Effect of influent nitrogen concentration on feasibility of short-cut nitrification during wastewater treatment in activated sludge systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F15%3A67414" target="_blank" >RIV/60460709:41210/15:67414 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1515/chempap-2015-0095" target="_blank" >http://dx.doi.org/10.1515/chempap-2015-0095</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/chempap-2015-0095" target="_blank" >10.1515/chempap-2015-0095</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of influent nitrogen concentration on feasibility of short-cut nitrification during wastewater treatment in activated sludge systems

Popis výsledku v původním jazyce

The inhibitory effect of free ammonia and free nitrous acid on nitrite-oxidising bacteria (NOB) was studied in a laboratory-scale sequencing batch reactor with a suspended microbial culture. The reactor was operated at 15 °C, with a dissolved oxygen concentration in excess of 5 mg L-1 and a nitrogen-loading rate of 0.2 kg m-3 d-1. Diluted reject water was used as influent. N?NO2- represented more than 90 % of all of the oxidised nitrogen, with influent TAN concentrations of 600 mg L-1, 300 mg L-1 and 150 mg L-1, respectively. With a TAN concentration of 75 mg L-1, a gradual increase in N?NO3- concentration was detected, indicating the threshold value enabling short-cut nitrification (SN) to be between 150 mg L-1 and 75 mg L-1 under the pertaining conditions. Next, the influent concentration of TAN was gradually increased from 75 mg L-1 to 1000 mg L-1 but the nitrite accumulation was not restored.

Název v anglickém jazyce

Effect of influent nitrogen concentration on feasibility of short-cut nitrification during wastewater treatment in activated sludge systems

Popis výsledku anglicky

The inhibitory effect of free ammonia and free nitrous acid on nitrite-oxidising bacteria (NOB) was studied in a laboratory-scale sequencing batch reactor with a suspended microbial culture. The reactor was operated at 15 °C, with a dissolved oxygen concentration in excess of 5 mg L-1 and a nitrogen-loading rate of 0.2 kg m-3 d-1. Diluted reject water was used as influent. N?NO2- represented more than 90 % of all of the oxidised nitrogen, with influent TAN concentrations of 600 mg L-1, 300 mg L-1 and 150 mg L-1, respectively. With a TAN concentration of 75 mg L-1, a gradual increase in N?NO3- concentration was detected, indicating the threshold value enabling short-cut nitrification (SN) to be between 150 mg L-1 and 75 mg L-1 under the pertaining conditions. Next, the influent concentration of TAN was gradually increased from 75 mg L-1 to 1000 mg L-1 but the nitrite accumulation was not restored.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Chemical Papers-Chemicke zvesti

ISSN

0366-6352

e-ISSN

—

Svazek periodika

69

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

9

Strana od-do

921-929

Kód UT WoS článku

000351637500003

EID výsledku v databázi Scopus

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