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Peng, L.; Carvajal-Arroyo, J.M.; Seuntjens, D.; Prat, D.; Colica, G.; Pintucci, C.; Vlaeminck, S.E. |
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Title |
Smart operation of nitritation/denitritation virtually abolishes nitrous oxide emission during treatment of co-digested pig slurry centrate |
Type |
A1 Journal article |
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Year |
2017 |
Publication |
Water research |
Abbreviated Journal |
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Volume |
127 |
Issue  |
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Pages |
1-10 |
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Keywords |
A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
The implementation of nitritation/denitritation (Nit/DNit) as alternative to nitrification/denitrification (N/DN) is driven by operational cost savings, e.g. 1.0-1.8 EUR/ton slurry treated. However, as for any biological nitrogen removal process, Nit/DNit can emit the potent greenhouse gas nitrous oxide (N2O). Challenges remain in understanding formation mechanisms and in mitigating the emissions, particularly at a low ratio of organic carbon consumption to nitrogen removal (CODrem/N-rem). In this study, the centrate (centrifuge supernatant) from anaerobic co-digestion of pig slurry was treated in a sequencing batch reactor. The process removed approximately 100% of ammonium a satisfactory nitrogen loading rate (0.4 g N/L/d), with minimum nitrite and nitrate in the effluent. Substantial N2O emission (around 17% of the ammonium nitrogen loading) was observed at the baseline operational condition (dissolved oxygen, DO, levels averaged at 0.85 mg O-2/L; CODrem/N-rem of 2.8) with similar to 68% of the total emission contributed by nitritation. Emissions increased with higher nitrite accumulation and lower organic carbon to nitrogen ratio. Yet, higher DO levels (similar to 2.2 mg O-2/L) lowered the aerobic N2O emission and weakened the dependency on nitrite concentration, suggesting a shift in N2O production pathway. The most effective N2O mitigation strategy combined intermittent patterns of aeration, anoxic feeding and anoxic carbon dosage, decreasing emission by over 99% (down to similar to 0.12% of the ammonium nitrogen loading). Without anaerobic digestion, mitigated Nit/DNit decreases the operational carbon footprint with about 80% compared to N/DN. With anaerobic digestion included, about 4 times more carbon is sequestered. In conclusion, the low CODrem/N-rem feature of Nit/DNit no longer offsets its environmental sustainability provided the process is smartly operated. (c) 2017 Elsevier Ltd. All rights reserved. |
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000418219000001 |
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2017-09-30 |
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0043-1354; 1879-2448 |
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no |
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Call Number |
UA @ admin @ c:irua:148521 |
Serial |
8548 |
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Author |
Zhang, Q.; Vlaeminck, S.E.; DeBarbadillo, C.; Suzuki, R.; Kharkar, S.M.; Al-Omari, A.; Wett, B.; Chandran, K.; Murthy, S.; De Clippeleir, H. |
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Title |
Startup strategies of deammonification reactors treating reject water from thermally hydrolyzed solids |
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P3 Proceeding |
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Year |
2017 |
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5 p.
T2 - WEFTEC.17, 30 September 4 October 2017, |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151113 |
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8579 |
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Author |
Keulemans, M. |
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Title |
Study of electron transfer processes in plasmonic photocatalysis |
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Doctoral thesis |
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2017 |
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170 p. |
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Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:147504 |
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8596 |
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Vlaeminck, S.E.; Kobayashi, K.; Jandra, J.; Van Nevel, S.; Vandekerckhove, T.G.L. |
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Title |
Sulphidotrophic denitrification treating regeneration water from ion exchange at high performance and low opex |
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P3 Proceeding |
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Year |
2017 |
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3 p.
T2 - IWA 2017 Conference on Sustainable Waste |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151108 |
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8620 |
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Author |
Xiao, Y. |
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Theoretical study of the optoelectronic properties of new type 2DEG materials : multilayer graphene and monolayer MoS2 |
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Doctoral thesis |
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2017 |
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144 p. |
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Doctoral thesis; Condensed Matter Theory (CMT) |
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no |
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Call Number |
UA @ admin @ c:irua:144948 |
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8661 |
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Author |
Alloul, A.; Vlaeminck, S.E. |
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Towards upgrading of wastewater resources to microbial protein : volatile fatty acids impacting growth kinetics and yield of purple bacteria |
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P3 Proceeding |
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2017 |
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2 p.
T2 - 5th IWA Benelux Young Water Professional |
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P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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UA @ admin @ c:irua:151115 |
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8683 |
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Author |
Bencs, L.; Horemans, B.; Buczyńska, A.J.; Van Grieken, R. |
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Title |
Uneven distribution of inorganic pollutants in marine air originating from ocean-going ships |
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A1 Journal article |
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Year |
2017 |
Publication |
Environmental pollution |
Abbreviated Journal |
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222 |
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226-233 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
The distribution of mass, water-soluble inorganic salts and mineral elements of size-segregated aerosols (PM1, PM2.5-1 and PM10-2.5), precursor gaseous pollutants, black carbon, and nanoparticles (10-300 nm size range) at the Southern Bight of the North Sea has been studied. The concentrations of air pollutants peaked over shipping lanes, open-water anchorage areas and frequently navigated waters, due to the presence of mobile emission sources. A considerable decrease in air pollutant levels was seen when diverting from these marine areas towards remote or coastal banks. These findings showed the rapid dispersion of pollutants in the marine air. The nano-aerosol count, originating from ocean-going ships, peaked at lower average aerodynamic diameters (e.g., approximate to 28 nm) than those, observed from low displacement vessels (45-50 nm, e.g., for fishing boats). The average diameter of nano-PM depended also on weather conditions, e.g., it was higher (approximate to 50 nm) in air of higher humidity. (C) 2016 Elsevier Ltd. All rights reserved. |
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000395360900028 |
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2017-01-06 |
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0269-7491; 1873-6424 |
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Call Number |
UA @ admin @ c:irua:142516 |
Serial |
8710 |
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Han, M.; Seuntjens, D.; Al-Omari, A.; Takacs, I.; Meerburg, F.; Murthy, S.; Vlaeminck, S.E.; De Clippeleir, H. |
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Water and process parameters as controllers for the ammonia to nitrite oxidation rate ratio in activated sludge |
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P3 Proceeding |
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Year |
2017 |
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Pages |
3 p.
T2 - IWA 2017 Conference on Sustainable Waste |
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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:151110 |
Serial |
8748 |
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de Paepe, J.; Lindeboom, R.E.F.; Vanoppen, M.; Alonso Farinas, B.; Coessens, W.; Abbas, A.; Christiaens, M.; Dotremont, C.; Beckers, H.; Lamaze, B.; Demey, D.; Rabaey, K.; Clauwaert, P.; Verliefde, A.R.D.; Vlaeminck, S.E. |
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Title |
Water treatment unit breadboard : ground test facility for the recycling of urine and shower water for one astronaut |
Type |
P3 Proceeding |
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Year |
2017 |
Publication |
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Abbreviated Journal |
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Pages |
2 p.
T2 - 5th IWA Benelux Young Water Professional |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Call Number |
UA @ admin @ c:irua:151114 |
Serial |
8749 |
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