High-Rate Partial Nitritation of Municipal Wastewater after Psychrophilic Anaerobic Pretreatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F17%3A43913548" target="_blank" >RIV/60461373:22320/17:43913548 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/abs/10.1021/acs.est.7b02078" target="_blank" >https://pubs.acs.org/doi/abs/10.1021/acs.est.7b02078</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.est.7b02078" target="_blank" >10.1021/acs.est.7b02078</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-Rate Partial Nitritation of Municipal Wastewater after Psychrophilic Anaerobic Pretreatment

Popis výsledku v původním jazyce

Partial nitritation/anammox can provide energy-efficient nitrogen removal from the main stream of municipal wastewater. The main bottleneck is the growth of nitrite oxidizing bacteria (NOB) at low temperatures (&lt;15 °C). To produce effluent suitable for anammox, real municipal astewater after anaerobic pretreatment was treated by enriched ammonium oxidizing bacteria (AOB) in suspended sludge SBR at 12 °C. NOB were continually washed out using aerobic duration control strategy (ADCS). Solids retention time was set to 9−16 days. Using this approach, average ammonia conversion higher than 57% at high oxidation rate of 0.4 ± 0.1 kg-N kg-VSS−1 d−1 was achieved for more than 100 days. Nitrite accumulation (N−NO2−/N−NOX) of 92% was maintained. Thus, consistently small amounts of present NOB were efficiently suppressed. Our mathematical model explained how ADCS enhanced the inhibition of NOB growth via NH3 and HNO2. This approach will produce effluent suitable for anammox even under winter conditions in mild climates.

Název v anglickém jazyce

High-Rate Partial Nitritation of Municipal Wastewater after Psychrophilic Anaerobic Pretreatment

Popis výsledku anglicky

Partial nitritation/anammox can provide energy-efficient nitrogen removal from the main stream of municipal wastewater. The main bottleneck is the growth of nitrite oxidizing bacteria (NOB) at low temperatures (&lt;15 °C). To produce effluent suitable for anammox, real municipal astewater after anaerobic pretreatment was treated by enriched ammonium oxidizing bacteria (AOB) in suspended sludge SBR at 12 °C. NOB were continually washed out using aerobic duration control strategy (ADCS). Solids retention time was set to 9−16 days. Using this approach, average ammonia conversion higher than 57% at high oxidation rate of 0.4 ± 0.1 kg-N kg-VSS−1 d−1 was achieved for more than 100 days. Nitrite accumulation (N−NO2−/N−NOX) of 92% was maintained. Thus, consistently small amounts of present NOB were efficiently suppressed. Our mathematical model explained how ADCS enhanced the inhibition of NOB growth via NH3 and HNO2. This approach will produce effluent suitable for anammox even under winter conditions in mild climates.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Science &amp; Technology

ISSN

0013-936X

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

11029-11038

Kód UT WoS článku

000412716500014

EID výsledku v databázi Scopus

2-s2.0-85030749036