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Seuntjens, D.; Carvajal Arroyo, J.M.; Van Tendeloo, M.; Chatzigiannidou, I.; Molina, J.; Nop, S.; Boon, N.; Vlaeminck, S.E. |
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Title |
Mainstream partial nitritation/anammox with integrated fixed-film activated sludge : combined aeration and floc retention time control strategies limit nitrate production |
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A1 Journal article |
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Year  |
2020 |
Publication |
Bioresource Technology |
Abbreviated Journal |
Bioresource Technol |
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Volume |
314 |
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123711-10 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Implementation of mainstream partial nitritation/anammox (PN/A) can lead to more sustainable and cost-effective sewage treatment. For mainstream PN/A reactor, an integrated fixed-film activated sludge (IFAS) was operated (26 °C). The effects of floccular aerobic sludge retention time (AerSRT_floc), a novel aeration strategy, and N-loading rate were tested to optimize the operational strategy. The best performance was observed with a low, but sufficient AerSRTfloc (~7d) and continuous aeration with two alternating dissolved oxygen setpoints: 10 min at 0.07–0.13 mg O2 L−1 and 5 min at 0.27–0.43 mg O2 L−1. Nitrogen removal rates were 122 ± 23 mg N L−1 d−1, and removal efficiencies 73 ± 13%. These conditions enabled flocs to act as nitrite sources while the carriers were nitrite sinks, with low abundance of nitrite oxidizing bacteria. The operational strategies in the source-sink framework can serve as a guideline for successful operation of mainstream PN/A reactors. |
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000558601200004 |
Publication Date |
2020-06-24 |
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0960-8524 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
11.4 |
Times cited |
3 |
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Notes |
; D.S. was supported by a Ph.D. grant from the Institute for the Promotion of Innovation by Science and Technology in Flanders (IWTVlaanderen, SB-131769). M.V.T. was supported by a Ph.D. SB Fellowship from the Research Foundation -Flanders (FWO-Vlaanderen, 1S03218N). ; |
Approved |
Most recent IF: 11.4; 2020 IF: 5.651 |
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Call Number |
UA @ admin @ c:irua:170054 |
Serial |
6559 |
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Seuntjens, D.; Han, M.; Kerckhof, F.-M.; Boon, N.; Al-Omari, A.; Takacs, I.; Meerburg, F.; De Mulder, C.; Wett, B.; Bott, C.; Murthy, S.; Carvajal Arroyo, J.M.; De Clippeleir, H.; Vlaeminck, S.E. |
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Title |
Pinpointing wastewater and process parameters controlling the AOB to NOB activity ratio in sewage treatment plants |
Type |
A1 Journal article |
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Year |
2018 |
Publication |
Water research |
Abbreviated Journal |
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Volume |
138 |
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37-46 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Even though nitrification/denitrification is a robust technology to remove nitrogen from sewage, economic incentives drive its future replacement by shortcut nitrogen removal processes. The latter necessitates high potential activity ratios of ammonia oxidizing to nitrite oxidizing bacteria (rAOB/rNOB). The goal of this study was to identify which wastewater and process parameters can govern this in reality. Two sewage treatment plants (STP) were chosen based on their inverse rAOB/rNOB values (at 20 °C): 0.6 for Blue Plains (BP, Washington DC, US) and 1.6 for Nieuwveer (NV, Breda, NL). Disproportional and dissimilar relationships between AOB or NOB relative abundances and respective activities pointed towards differences in community and growth/activity limiting parameters. The AOB communities showed to be particularly different. Temperature had no discriminatory effect on the nitrifiers' activities, with similar Arrhenius temperature dependences (ΘAOB = 1.10, ΘNOB = 1.061.07). To uncouple the temperature effect from potential limitations like inorganic carbon, phosphorus and nitrogen, an add-on mechanistic methodology based on kinetic modelling was developed. Results suggest that BP's AOB activity was limited by the concentration of inorganic carbon (not by residual N and P), while NOB experienced less limitation from this. For NV, the sludge-specific nitrogen loading rate seemed to be the most prevalent factor limiting AOB and NOB activities. Altogether, this study shows that bottom-up mechanistic modelling can identify parameters that influence the nitrification performance. Increasing inorganic carbon in BP could invert its rAOB/rNOB value, facilitating its transition to shortcut nitrogen removal. |
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000431747300005 |
Publication Date |
2017-11-24 |
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0043-1354; 1879-2448 |
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Call Number |
UA @ admin @ c:irua:149976 |
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8385 |
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Author |
Seuntjens, D.; Carvajal Arroyo, J.M.; Molina, J.; Boon, N.; Vlaeminck, S.E. |
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Title |
Enabling partial nitritation/anammox on pre-treated sewage with IFAS : aeration and floc SRT control strategies limit nitrate production |
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P3 Proceeding |
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2017 |
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3 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:151116 |
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7901 |
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