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Author |
Rezaei, M.; Seuntjens, P.; Shahidi, R.; Joris, I.; Boenne, W.; Al-Barri, B.; Cornelis, W. |
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Title |
The relevance of in-situ and laboratory characterization of sandy soil hydraulic properties for soil water simulations |
Type |
A1 Journal article |
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Year  |
2016 |
Publication |
Journal of hydrology |
Abbreviated Journal |
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Volume |
534 |
Issue |
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Pages |
251-265 |
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Keywords |
A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Field water flow processes can be precisely delineated with proper sets of soil hydraulic properties derived from in situ and/or laboratory experiments. In this study we analyzed and compared soil hydraulic properties obtained by traditional laboratory experiments and inverse optimization tension infiltrometer data along the vertical direction within two typical Podzol profiles with sand texture in a potato field. The main goal was to identify proper sets of hydraulic parameters and to evaluate their relevance on hydrological model performance for irrigation management purposes. Tension disc infiltration experiments were carried out at four and five different depths for both profiles at consecutive negative pressure heads of 12, 6, 3 and 0.1 cm. At the same locations and depths undisturbed samples were taken to determine Mualem-van Genuchten (MVG) hydraulic parameters (theta(r), residual water content, theta(s), saturated water content, alpha and n, shape parameters and K-ls, saturated hydraulic conductivity) in the laboratory. Results demonstrated horizontal differences and vertical variability of hydraulic properties. The tension disc infiltration data fitted well in inverse modeling using Hydrus 2D/3D in combination with final water content at the end of the experiment, theta(f). Four MVG parameters (theta(s), alpha, n and field saturated hydraulic conductivity K-fs) were estimated (theta(r) set to zero), with estimated K-ls and alpha values being relatively similar to values from Wooding's solution which used as initial value and estimated theta(s) corresponded to (effective) field saturated water content, theta(f). The laboratory measurement of K-ls yielded 2-30 times higher values than the field method K-fs from top to subsoil layers, while there was a significant correlation between both K-s values (r = 0.75). We found significant differences of MVG parameters theta(s), n and alpha values between laboratory and field measurements, but again a significant correlation was observed between laboratory and field MVG parameters namely K-s, n, theta(s) (r >= 0.59). Assessment of the parameter relevance in 1-D model simulations, illustrated that the model over predicted and under predicted top soil-water content using laboratory and field experiments data sets respectively. The field MVG parameter data set resulted in better agreement to observed soil-water content as compared to the laboratory data set at nodes 10 and 20 cm. However, better simulation results were achieved using the laboratory data set at 30-60 cm depths. Results of our study do not confirm whether laboratory or field experiments data sets are most appropriate to predict soil water fluctuations in a complete soil profile, while field experiments are preferred in many studies. (C) 2016 Elsevier B.V. All rights reserved. |
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000371940900022 |
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2016-01-11 |
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0022-1694 |
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no |
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Call Number |
UA @ admin @ c:irua:133161 |
Serial |
8657 |
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Author |
Snoeckx, R.; Heijkers, S.; Van Wesenbeeck, K.; Lenaerts, S.; Bogaerts, A. |
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Title |
CO2conversion in a dielectric barrier discharge plasma: N2in the mix as a helping hand or problematic impurity? |
Type |
A1 Journal article |
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Year |
2016 |
Publication |
Energy & environmental science |
Abbreviated Journal |
Energ Environ Sci |
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Volume |
9 |
Issue |
9 |
Pages |
999-1011 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Carbon dioxide conversion and utilization has gained significant interest over the years. A novel gas conversion technique with great potential in this area is plasma technology. A lot of research has already been performed, but mostly on pure gases. In reality, N2 will always be an important impurity in effluent
gases. Therefore, we performed an extensive combined experimental and computational study on the effect of N2 in the range of 1–98% on CO2 splitting in dielectric barrier discharge (DBD) plasma. The presence of up to 50% N2 in the mixture barely influences the effective (or overall) CO2 conversion and energy efficiency, because the N2 metastable molecules enhance the absolute CO2 conversion, and this compensates for the lower CO2 fraction in the mixture. Higher N2 fractions, however, cause a drop in the CO2 conversion and energy efficiency. Moreover, in the entire CO2/N2 mixing ratio, several harmful compounds, i.e., N2O and NOx compounds, are produced in the range of several 100 ppm. The reaction pathways for the formation of these compounds are explained based on a kinetic analysis, which allows proposing solutions on how to prevent the formation of these harmful compounds. |
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000372243600030 |
Publication Date |
2015-12-15 |
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ISSN |
1754-5692 |
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UA library record; WoS full record; WoS citing articles |
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Impact Factor |
29.518 |
Times cited |
68 |
Open Access |
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Notes |
The authors acknowledge financial support from the IAP/7 (Inter-university Attraction Pole) program ‘PSI-Physical Chemistry of Plasma-Surface Interactions’, financially supported by the Belgian Federal Office for Science Policy (BELSPO), as well as the Fund for Scientific Research Flanders (FWO). This work was carried out in part using the Turing HPC infrastructure at the CalcUA core facility of the Universiteit Antwerpen, a division of the Flemish Supercomputer Center VSC, funded by the Hercules Foundation, the Flemish Government (department EWI) and the University of Antwerp. |
Approved |
Most recent IF: 29.518 |
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Call Number |
c:irua:133169 |
Serial |
4020 |
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Author |
Li, T.; Piltz, B.; Podola, B.; Dron, A.; de Beer, D.; Melkonian, M. |
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Title |
Microscale profiling of photosynthesis-related variables in a highly productive biofilm photobioreactor |
Type |
A1 Journal article |
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Year |
2016 |
Publication |
Biotechnology and bioengineering |
Abbreviated Journal |
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Volume |
113 |
Issue |
5 |
Pages |
1046-1055 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
In the present study depth profiles of light, oxygen, pH and photosynthetic performance in an artificial biofilm of the green alga Halochlorella rubescens in a porous substrate photobioreactor (PSBR) were recorded with microsensors. Biofilms were exposed to different light intensities (50-1,000mol photons m(-2) s(-1)) and CO2 levels (0.04-5% v/v in air). The distribution of photosynthetically active radiation showed almost identical trends for different surface irradiances, namely: a relatively fast drop to a depth of about 250 mu m, (to 5% of the incident), followed by a slower decrease. Light penetrated into the biofilm deeper than the Lambert-Beer Law predicted, which may be attributed to forward scattering of light, thus improving the overall light availability. Oxygen concentration profiles showed maxima at a depth between 50 and 150m, depending on the incident light intensity. A very fast gas exchange was observed at the biofilm surface. The highest oxygen concentration of 3.2mM was measured with 1,000mol photons m(-2) s(-1) and 5% supplementary CO2. Photosynthetic productivity increased with light intensity and/or CO2 concentration and was always highest at the biofilm surface; the stimulating effect of elevated CO2 concentration in the gas phase on photosynthesis was enhanced by higher light intensities. The dissolved inorganic carbon concentration profiles suggest that the availability of the dissolved free CO2 has the strongest impact on photosynthetic productivity. The results suggest that dark respiration could explain previously observed decrease in growth rate over cultivation time in this type of PSBR. Our results represent a basis for understanding the complex dynamics of environmental variables and metabolic processes in artificial phototrophic biofilms exposed to a gas phase and can be used to improve the design and operational parameters of PSBRs. Biotechnol. Bioeng. 2016;113: 1046-1055. (c) 2015 Wiley Periodicals, Inc. |
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000373476700013 |
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2015-10-24 |
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ISSN |
0006-3592 |
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no |
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Call Number |
UA @ admin @ c:irua:133255 |
Serial |
8248 |
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Author |
Sóti, V.; Jacquet, N.; Apers, S.; Richel, A.; Lenaerts, S.; Cornet, I. |
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Title |
Monitoring the laccase reaction of vanillin and poplar hydrolysate |
Type |
A1 Journal article |
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Year |
2016 |
Publication |
Journal of chemical technology and biotechnology |
Abbreviated Journal |
J Chem Technol Biot |
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Volume |
91 |
Issue |
6 |
Pages |
1914-1922 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL); Biochemical Wastewater Valorization & Engineering (BioWaVE) |
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Abstract |
BACKGROUND Laccase is an intensively researched enzyme for industrial use. Except for decolorisation measurements, HPLC analysis is the conventional method for monitoring the phenolic removal during laccase enzyme reaction. This paper reports an investigation of the continuous UV absorbance follow-up of the laccase reaction with steam pretreated poplar hydrolysate. RESULTS Vanillin was used as a model substrate and lignocellulose xylose rich fraction (XRF) as a biologically complex substrate for laccase detoxification. The reaction was followed by HPLC-UV as well as by UV spectrometric measurements. Results suggest that the reaction can be successfully monitored by measuring the change of UV absorbance at 280 nm, without previous compound separation. In case of XRF experiments the spectrophotometric follow-up is especially useful, as HPLC analysis takes a long time and provides less information than in case of single substrates. The method seems to be suitable for optimization and process control. CONCLUSION The obtained results can help to construct a fast, easy and straightforward monitoring system for laccase-phenolic substrate reactions. |
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000375768300040 |
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2015-07-29 |
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ISSN |
0268-2575; 1097-4660 |
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Impact Factor |
3.135 |
Times cited |
3 |
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Notes |
; This research is financed by the University of Antwerp (project number 15 FA100 002). ; |
Approved |
Most recent IF: 3.135 |
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Call Number |
UA @ admin @ c:irua:127694 |
Serial |
5972 |
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Author |
Anibas, C.; Schneidewind, U.; Vandersteen, G.; Joris, I.; Seuntjens, P.; Batelaan, O. |
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Title |
From streambed temperature measurements to spatial-temporal flux quantification : using the LPML method to study groundwater-surface water interaction |
Type |
A1 Journal article |
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Year |
2016 |
Publication |
Hydrological processes |
Abbreviated Journal |
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Volume |
30 |
Issue |
2 |
Pages |
203-216 |
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Keywords |
A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Knowledge on groundwater-surface water interaction and especially on exchange fluxes between streams and aquifers is an important prerequisite for the study of transport and fate of contaminants and nutrients in the hyporheic zone. One possibility to quantify groundwater-surface water exchange fluxes is by using heat as an environmlental tracer. Modern field equipment including multilevel temperature sticks and the novel open-source analysis tool LPML make this technique ever more attractive. The recently developed LPML method solves the one-dimensional fluid flow and heat transport equation by combining a local polynomial method with a maximum likelihood estimator. In this study, we apply the LPML method on field data to quantify the spatial and temporal variability of vertical fluxes and their uncertainties from temperature-time series measured in a Belgian lowland stream. Over several months, temperature data were collected with multilevel temperature sticks at the streambed top and at six depths for a small stream section. Long-term estimates show a range from gaining fluxes of -291 mm day(-1) to loosing fluxes of 12 mm day(-1); average seasonal fluxes ranged from -138 mm day(-1) in winter to -16 mm day(-1) in summer. With our analyses, we could determine a high spatial and temporal variability of vertical exchange fluxes for the investigated stream section. Such spatial and temporal variability should be taken into account in biogeochemical cycling of carbon, nutrients and metals and in fate analysis of contaminant plumes. In general, the stream section was gaining during most of the observation period. Two short-term high stream stage events, seemingly caused by blockage of the stream outlet, led to a change in flow direction from gaining to losing conditions. We also found more discharge occurring at the outer stream bank than at the inner one indicating a local flow-through system. With the conducted analyses, we were able to advance our understanding of the regional groundwater flow system. Copyright (C) 2015 John Wiley & Sons, Ltd. |
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000369164900004 |
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2015-06-24 |
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0885-6087 |
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no |
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Call Number |
UA @ admin @ c:irua:131587 |
Serial |
7986 |
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Author |
Zhang, Q.; De Clippeleir, H.; Shaw, A.; DeBarbadillo, C.; Su, C.; Al-Omari, A.; Wett, B.; Chandran, K.; Vlaeminck, S.E.; Murthy, S. |
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Title |
Mechanistic understanding of microbial activity inhibition : case study on sidestream deammonification for digester supernatant pretreated by thermal hydrolysis |
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P3 Proceeding |
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2016 |
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5 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151133 |
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8214 |
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Zhang, Q.; De Clippeleir, H.; DeBarbadillo, C.; Su, C.; Al-Omari, A.; Wett, B.; Chandran, K.; Vlaeminck, S.E.; Murthy, S. |
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Title |
Inhibition mechanisms affecting deammonification of dewatering filtrate from thermally hydrolyzed digested solid |
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P3 Proceeding |
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Year |
2016 |
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9 p.
T2 - WEFTEC.16, 24 - 28 September 2016, New O |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151123 |
Serial |
8102 |
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Vandekerckhove, T.G.L.; Courtens, E.N.P.; Prat, D.; Boon, N.; Vlaeminck, S.E. |
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Title |
The rise of thermophilic biotechnology for nitrogen removal |
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P3 Proceeding |
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2016 |
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17 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151125 |
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8481 |
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Vandekerckhove, T.; Courtens, E.N.P.; Prat, D.; Vilchez-Vargas, R.; Vital, M.; Pieper, D.H.; Meerbergen, K.; Lievens, B.; Boon, N.; Vlaeminck, S.E. |
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Transitioning from mesophilic to thermophilic nitrification: shaping a niche for archaeal ammonia oxidizers |
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P3 Proceeding |
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2016 |
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9 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151126 |
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8697 |
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Van Winckel, T.; De Clippeleir, H.; Yapuwa, H.; Wett, B.; Bott, C.; Sturm, B.; Vlaeminck, S.E.; Al-Omari, A.; Murthy, S. |
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Lets settle together? Extending external selection from mainstream deammonification to high-rate activated sludge |
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P3 Proceeding |
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2016 |
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13 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151131 |
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8171 |
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Van Winckel, T.; De Clippeleir, H.; Mancell-Egala, A.; Rahman, A.; Wett, B.; Bott, C.; Sturm, B.; Vlaeminck, S.E.; Al-Omari, A.; Murthy, S. |
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Balancing flocs and granules by external selectors to increase capacity in high-rate activated sludge systems |
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P3 Proceeding |
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2016 |
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6 p.
T2 - WEFTEC.16, 24 - 28 September 2016, New O |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151122 |
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7548 |
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Van Wesenbeeck, K. |
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Plasma catalysis as an efficient and sustainable air purification technology |
Type |
Doctoral thesis |
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2016 |
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171 p. |
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Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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978-90-5728-514-1 |
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no |
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Call Number |
UA @ admin @ c:irua:135267 |
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8388 |
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| Permanent link to this record |
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Author |
Sui, Y.; Alloul, A.; Muys, M.; Makyeme, M.; Coppens, J.; Verstraete, W.; Vlaeminck, S.E. |
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Title |
Invigorating the renaissance of single cell protein : safe opportunities for nutrient recovery and reuse as feed ingredient |
Type |
P3 Proceeding |
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Year |
2016 |
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Abbreviated Journal |
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Issue |
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Pages |
12 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151128 |
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8130 |
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Author |
Seuntjens, D.; Meerburg, F.A.; Vlaeminck, S.E.; Roume, H.; Pieper, D.H.; Jauregui, R.; Vilchez-Vargas, R.; Boon, N. |
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Title |
Microbial ecology of high-rate versus conventional activated sludge : environmental and operational parameters shape microbial structure, co-occurrence and functionality |
Type |
P3 Proceeding |
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Year |
2016 |
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Volume |
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Pages |
4 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151127 |
Serial |
8241 |
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Author |
Pintucci, C.; Peng, L.; Prat, D.; Colica, G.; Merijn, P.; Colsen, J.; Varga, S.; Sarli, J.; Benito, O.; Vlaeminck, S.E. |
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Title |
The ManureEcoMine Pilot Plant : towards advanced nutrient management in livestock waste treatment |
Type |
P3 Proceeding |
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Year |
2016 |
Publication |
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Abbreviated Journal |
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Volume |
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Pages |
13 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151130 |
Serial |
8201 |
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Author |
Muys, M.; Derese, S.; Verliefde, A.; Vlaeminck, S.E. |
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Title |
Struvite solubilisation rates enable direct addition To single cell protein bioreactors |
Type |
P3 Proceeding |
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Year |
2016 |
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Volume |
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Pages |
10 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151129 |
Serial |
8590 |
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Author |
Muys, M.; Derese, S.; Verliefde, A.; Vlaeminck, S.E. |
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Title |
Solubilization of struvite as a sustainable nutrient source for single cell protein production |
Type |
A2 Journal article |
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Year |
2016 |
Publication |
Communications in agricultural and applied biological sciences |
Abbreviated Journal |
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Volume |
81 |
Issue |
1 |
Pages |
179-184 |
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Keywords |
A2 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
By 2050, the world population will have considerably expanded and the life standard of many will increase, yielding a 50% higher demand in protein (FAO, 2011), and even increases of 82 and 102% for diary and meat products, respectively (Boland et al., 2013). To provide in this increasing demand we are highly dependent on our classical fertilizer to food chain which has a high environmental impact and lacks efficiency. Nutrient losses cause eutrophication and biodiversity loss and the input of resources is already beyond the boundaries of environmental sustainability (Steffen et al., 2015). Phosphate fertilizers are made from phosphate rock (apatite), of which the reserves are predicted to be depleted within 50 100 years if we continue business as usual (Cordell et al., 2009). Next to problems related to the unbalanced geopolitical distribution with dominance in China and Morocco, the decreasing quality of the remaining apatite will result in an increasing environmental impact of fertilizer production. Finally, our traditional food production model requires 30% of all ice-free land, 70% of all available freshwater and produces up to one third of the global greenhouse gas emission, of which 80 to 86% is linked to agricultural production (Vermeulen et al., 2012). To ensure food security, nutrient recovery from waste streams can provide an important strategy. In this context, struvite ( ) crystallisation may be applied to recover phosphorus, along with some nitrogen. Reusing these nutrients as agricultural fertilizer on the field will lead to considerable losses to the environment. In contrast, their use to cultivate micro-organisms, e.g. for single cell protein (SCP), offers to potential of a near perfect conversion efficiency (Moed et al., 2015). At this moment, microalgae represent the most developed type of SCP, and are a promising protein source due to their growth rate, high nutritional quality and extremely high nutrient usage efficiency (Becker, 2007). Reliable solubilisation data are essential to design a technological strategy for struvite dosage in bioreactors for SCP production. The effect on solubility and solubilisation rate of relevant physicochemical parameters was studied experimentally in aqueous solutions. Because pH and temperature greatly affect solubilisation kinetics they were set at a constant value of 7 and 20°C respectively. The effect of some parameters on struvite solubility was already studied (Bhuiyan et al., 2007; Ariyanto et al., 2014; Roncal-Herrero and Oelkers, 2011), but solubilisation rates were not yet considered and pH was not controlled at a constant value. The chemical parameters considered in this study include the concentration of different common ions ( and ), foreign ions ( and the chelating agent ethylenediaminetetraacetic acid, EDTA) present in micro-algal cultivation media as well as ionic strength (as set by NaCl). The main physical parameter included was contact surface, through variation in initial particle size and as well as in struvite dosage concentration. |
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1379-1176 |
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no |
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Call Number |
UA @ admin @ c:irua:151150 |
Serial |
8550 |
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Author |
Mozo, I.; Lacoste, L.; De Cocker, P.; Vlaeminck, S.E.; Sperandio, M.; Bessiere, Y.; Hernandez-Raquet, G.; Caligaris, M.; Barillon, B.; Martin Ruel, S. |
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Title |
Impact of temperature on mainstream deammonification performance and microbial community |
Type |
P3 Proceeding |
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Year |
2016 |
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Abbreviated Journal |
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Volume |
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Pages |
3 p.
T2 - IWA World Water Congress & Exhibition (W |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151121 |
Serial |
8065 |
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Mozo, I.; Lacoste, L.; aussenac, J.; De Cocker, P.; Vlaeminck, S.E.; Sperandio, M.; Caligaris, M.; Graveleau, L.; Barillon, B.; Martin Ruel, S. |
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Title |
Towards application of mainstream deammonification on municipal wastewater in warm and cold areas |
Type |
P3 Proceeding |
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Year |
2016 |
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4 p.
T2 - World Cities Summit, Singapore Internati |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151124 |
Serial |
8678 |
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Author |
Mozo, I.; Lacoste, L.; Aussenac, J.; De Cocker, P.; Vlaeminck, S.E.; Sperandio, M.; Caligaris, M.; Barillon, B.; Martin Ruel, S. |
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Title |
Overcoming the challenges for mainstream deammonification on municipal wastewater in warm and cold areas |
Type |
P3 Proceeding |
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Year |
2016 |
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Pages |
3 p.
T2 - 13th IWA Leading-Edge Conference on Wate |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151137 |
Serial |
8351 |
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Mozo, I.; Lacoste, L.; Aussenac, J.; De Cocker, P.; Vlaeminck, S.E.; Sperandio, M.; Caligaris, M.; Barillon, B.; Martin Ruel, S. |
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Title |
Towards application of mainstream deammonification on municipal wastewater in warm and cold areas |
Type |
P3 Proceeding |
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Year |
2016 |
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Abbreviated Journal |
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Volume |
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Pages |
4 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151136 |
Serial |
8679 |
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Author |
Meerburg, F.A.; Rahman, A.; Van Winckel, T.; Pauwels, K.; De Clippeleir, H.; Al-Omari, A.; Murthy, S.; Boon, N.; Vlaeminck, S.E. |
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Title |
Fast and furious : optimization and validation of high-rate contact stabilization (HiCS) for recovery of organics from sewage |
Type |
P3 Proceeding |
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Year |
2016 |
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Abbreviated Journal |
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3 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151132 |
Serial |
7958 |
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Author |
Ilgrande, C.; Christiaens, M.; Clauwaert, P.; Vlaeminck, S.E.; Boon, N. |
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Title |
Can nitrification bring us to Mars? The role of microbial interactions on nitrogen recovery in Life Support Systems |
Type |
A2 Journal article |
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Year |
2016 |
Publication |
Communications in agricultural and applied biological sciences |
Abbreviated Journal |
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Volume |
81 |
Issue |
1 |
Pages |
74-79 |
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Keywords |
A2 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
The development cost-effective life support technologies is a highly relevant topic for space biology. Currently, food and water supply during space flights is currently restricted by technical and economic constraints: daily water consumption of an average crew of 6 members is about 72 L, with an estimated cost of 2,160,000 d-1. To reduce these costs and sustain long term space missions, the European Space Agency designed MELiSSA, an artificial ecosystem based on 5 compartments for the recycling gas, liquid and solid waste (Lasseur et al., 2011). In the CI stage, crew and inedible solid waste is fermented by thermophilic anaerobic bacteria, producing volatile fatty acids (VFAs), CO2 and ammonium (NH4+). In the CII compartment the VFAs are converted into edible biomass, using the photoheterotroph Rodospirillum rubrum. Afterwards, the nitrifying CIII unit converts toxic levels of ammonia/ammonium into nitrate, which enables the effluent to be fed to the photoautotrohopic CIV stage, that provides food and oxygen for the crew (Godia et al., 2002). The highest nitrogen flux in a Life Support System is human urine. As nitrate is the preferred form of nitrogen fertilizer for hydroponic plant cultivation, urine nitrification is an essential process in the MELiSSA loop. The development of the Additional Unit for Water Treatment or Urine NItrification ConsortiUM (UNICUM) requires the selection and characterization of the microorganisms that will be used. The key microorganisms in the biological treatment of urine are heterotrophs, for the hydrolysis of urea into ammonia and carbon dioxide, Ammonia Oxidizing Bacteria (AOB), for the ammonia oxidation into nitrite and Nitrite Oxidizing Bacteria (NOB), for the conversion of nitrite into nitrate. The strains were selected according to predefined safety (non sporogenic and BSL 1) and metabolic (Ks, μmax) criteria. To evaluate functional consortia for space applications, ureolysis, nitritation and nitratation of the selected microorganisms and synthetic communities were elucidated. Additionally, urine is a matrix with a high salt content. Unhydrolised urine's EC ranges from 1.1 to 33.9 mS/cm, the mean value being 21.5 mS/cm (Marickar, 2010), while hydrolysed urine can reach higher levels, up to 75 mS/cm. This conditions could inhibit microbial metabolism, therefore the effect of salinity on urine nitrification was also elucidated. |
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1379-1176 |
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no |
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Call Number |
UA @ admin @ c:irua:151151 |
Serial |
7573 |
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Author |
Han, M.; De Clippeleir, H.; Al-Omari, A.; Vlaeminck, S.E.; Wett, B.; Murthy, S. |
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Title |
Free ammonia and/or temperature impact study on temperature-acclimated mainstream nitrification sludge |
Type |
P3 Proceeding |
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Year |
2016 |
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Abbreviated Journal |
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3 p.
T2 - WEF/IWA Nutrient Removal and Recovery Co |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151134 |
Serial |
7984 |
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Author |
Grunert, O.; Robles Aguilar, A.A.; Hernandez-Sanabria, E.; Vandekerckhove, T.; Reheul, D.; Van Labeke, M.-C.; Vlaeminck, S.; Boon, N.; Jablonowski, N.D. |
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Title |
Struvite and organic fertilizer impacting the rhizosphere microbial community, nutrient turnover and plant growth performance |
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P3 Proceeding |
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Year |
2016 |
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Pages |
12 p.
T2 - WEF/IWA Nutrient Removal and Recovery C |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:151135 |
Serial |
8589 |
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Author |
Grunert, O.; Robles Aguilar, A.A.; Hernandez-Sanabria, E.; Reheul, D.; Vlaeminck, S.E.; Boon, N.; Jablonowski, N.D. |
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Title |
Fertilizer type influences dynamics of the microbial community structure in the rhizosphere of tomato and impact the nutrient turnover and plant performance |
Type |
A2 Journal article |
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Year |
2016 |
Publication |
Communications in agricultural and applied biological sciences |
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Volume |
81 |
Issue |
1 |
Pages |
67-73 |
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Keywords |
A2 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Ammonia-oxidizing microorganisms (AOB and AOA) and nitrite oxidizing bacteria (NOB) are the most important organisms responsible for ammonia and nitrite oxidation in agricultural ecosystems and growing media. Ammonia and nitrite oxidation are critical steps in the soil nitrogen cycle and can be affected by the application of mineral fertilizers or organic fertilizers. The functionality of the microbial community has a major impact on the nutrient turnover and will finally influence plant performance. The microbial community associated with the growing medium and its functionality will also be influenced by the rhizosphere and the bulk soil. In our study, we used a tomato plant with a high root exudation capacity in order to stimulate microbial activity. We studied plant performance in rhizotrons (a phentotyping system for imaging roots), including an optical method (planar optodes) for non-invasive, quantitative and high-resolution imaging of pH dynamics in the rhizosphere and adjacent medium. The horticultural growing medium was supplemented with organic-derived nitrogen or ammonium derived from struvite. The possible differences in the root structure between treatments is compared with the total root length. Destructive growing medium sampling and high throughput sequencing analysis of the bacterial abundance of the communities present in the rhizosphere and the bulk soil is used to study the growing medium-associated microbial community structure and functionality, and this will be related to pH changes in the rhizosphere and the bulk soil. Our hypothesis is that the growing medium-associated microbial community structure changes depending on the nitrogen form provided and we expect a higher abundance of bacteria in the treatment with organic fertilizer and a higher abundance of AOB and NOB in the rhizosphere in comparison to the bulk soil. |
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1379-1176 |
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Call Number |
UA @ admin @ c:irua:151149 |
Serial |
7964 |
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Author |
Gielis, J.; Ding, Y.; Shi, P. |
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Title |
Towards a geometrical theory of morphology and morphogenesis |
Type |
P3 Proceeding |
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Year |
2016 |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
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Call Number |
UA @ admin @ c:irua:144548 |
Serial |
8677 |
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Author |
Fenu, A. |
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Title |
Modelling and operations of municipal membrane bioreactors : from conventional to novel applications |
Type |
Doctoral thesis |
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Year |
2016 |
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180 p. |
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Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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978-90-5728-504-2 |
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UA @ admin @ c:irua:157025 |
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8266 |
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Author |
Carvajal-Arroyo, J.M.; Vitor Akaboci, T.R.; Ruscalleda, M.; Colprim, J.; Courtens, E.; Vlaeminck, S.E. |
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Title |
Biofilms for one-stage autotrophic nitrogen removal |
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H3 Book chapter |
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2016 |
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205-222
T2 - Aquatic biofilms : ecology, water qua |
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H3 Book chapter; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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978-1-910190-17-3 |
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no |
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UA @ admin @ c:irua:130466 |
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7559 |
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Author |
Kim, E.; Spooren, J.; Broos, K.; Horckmans, L.; Quaghebeur, M.; Vrancken, K.C. |
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Title |
Selective recovery of Cr from stainless steel slag by alkaline roasting followed by water leaching |
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A1 Journal article |
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2015 |
Publication |
Hydrometallurgy |
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158 |
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139-148 |
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A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Selective chromium (Cr) leaching from stainless steel slag (SS slag) by alkali roasting followed by water leaching was investigated. The efficiency of the alkali roasting process for Cr leaching was increased by optimizing the mass ratio of alkaline agents (NaOH, and NaOH-NaNO3) to the slag, roasting temperature and time. At the optimum condition (0.67 mass ratio of NaOH to SS slag, 400 degrees C, 2 h) of NaOH roasting, chromium leaching was around 83%, while the matrix material was dissolved only to a limited extent (Si 8.0%). Mechanical activation of the SS slag prior to roasting reduced the optimum NaOH to SS slag mass ratio to 0.4. The addition of NaNO3 as an oxidant to the NaOH salt increased Cr leaching to 89% after roasting at 400 degrees C for 2 h. The remaining Cr phases in the residue were almost exclusively FeCr alloys. Further chromium dissolution from these alloys is prevented by a passivation layer of Fe oxides as shown by SEM/EDS images. Based on these results, a SS slag recycling process is suggested in which roasting-water leaching followed by water washing to remove Cr yields a residue which has potential for application as a construction material. (C) 2015 Elsevier B.V. All rights reserved. |
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000366768000019 |
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2015-11-02 |
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0304-386x |
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Call Number |
UA @ admin @ c:irua:130223 |
Serial |
8504 |
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