Effect of wastewater temperature and concentration of organic compounds on the efficiency of ammonium nitrogen removal in a household treatment plant servicing a school building

Bugajski, Piotr; Kurek, Karolina; Jóźwiakowski, Krzysztof

doi:10.24425/aep.2019.128638

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Tytuł artykułu

Effect of wastewater temperature and concentration of organic compounds on the efficiency of ammonium nitrogen removal in a household treatment plant servicing a school building

Autorzy

Bugajski Piotr , Kurek Karolina , Jóźwiakowski Krzysztof

Treść / Zawartość

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Identyfikatory

DOI

10.24425/aep.2019.128638

Warianty tytułu

Wpływ temperatury ścieków oraz związków organicznych na skuteczność usuwania azotu amonowego w przydomowej oczyszczalni przy budynku szkolnym

Języki publikacji

Abstrakty

The aim of this study was to determine the impact of the temperature of wastewater in a biological reactor with activated sludge and the BOD₅/N-NH₄ ratio in the influent to the treatment plant on nitrification efficiency and the concentration of ammonium nitrogen in treated wastewater. Tests were carried out in a household wastewater treatment plant which collects and treats sewage from a school building and a teacher’s house. During the 3-year study, large fluctuations in the sewage temperature in bioreactor were noted which was closely related to the ambient temperature. There were also large fluctuations in the concentration of organic matter and the concentration of ammonium nitrogen in inflowing sewage. The influence of wastewater temperature in the bioreactor and the BOD₅/N-NH₄ ratio on the concentration of ammonium nitrogen in treated wastewater was determined using Pearson’s linear correlation. A statistical analysis showed that a 1°C decrease in the temperature of wastewater in the bioreactor increased the concentration of ammonium nitrogen in treated wastewater by 2.64 mgN-NH₄·L^-1. Moreover, it was found that nitrification depended on the ratio of BOD₅ to the concentration of ammonium nitrogen in wastewater flowing into the bioreactor. An increase in the BOD₅/N-NH₄ ratio by 1 value led to a 5.41 mgN-NH₄·L^-1 decrease in the concentration of ammonium nitrogen.

Celem pracy było określenie wpływu temperatury ścieków w reaktorze biologicznym z osadem czynnym oraz stosunku BZT₅/N-NH₄ w ściekach dopływających do oczyszczalni na skuteczność procesu nitryfikacji i stężenia azotu amonowego w ściekach oczyszczonych. Badania prowadzono w przydomowej oczyszczalni, do której odpływają ścieki z budynku szkolnego oraz domu nauczyciela. W okresie 3-letnich badań odnotowano duże wahania temperatury ścieków w bioreaktorze co było ściśle związane z temperaturą otoczenia. Stwierdzono również duże wahania stężenia materii organicznej oraz stężenia azotu amonowego w ściekach dopływających. Analizę wpływu temperatury ścieków w bioreaktorze oraz stosunku BZT₅/N-NH₄ na stężenie azotu amonowego w ściekach oczyszczonych określono za pomocą korelacji liniowej Persona. W wyniku przeprowadzonej analizy statystycznej stwierdzono, że wraz obniżeniem temperatury ścieków w bioreaktorze o 1°C następuje zwiększenie stężenia azotu amonowego w ściekach oczyszczonych o 2,64 mgN-NH₄·L^-1. Ponadto stwierdza się, że proces nitryfikacji zależny jest od stosunku BZT₅ do stężenia azotu amonowego w ściekach dopływających do bioreaktora. Wraz ze wzrostem zależności BZT₅/N-NH₄ o 1 maleje stężenie stężenia azotu amonowego o 5,41 mgN-NH₄·L^-1

Słowa kluczowe

household wastewater treatment plant ammonium nitrogen organic compounds BOD5 air temperature wastewater temperature

przydomowa oczyszczalnia ścieków azot amonowy związki organiczne BZT5 temperatura powietrza temperatura ścieków

Wydawca

Institute of Environmental Engineering, Polish Academy of Sciences

Czasopismo

Archives of Environmental Protection

Rocznik

2019

Tom

Vol. 45, no. 3

Strony

31--37

Opis fizyczny

Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Bugajski Piotr

p.bugajski@urk.edu.pl

University of Agriculture in Kraków, Poland

autor

Kurek Karolina

University of Agriculture in Kraków, Poland

autor

Jóźwiakowski Krzysztof

University of Life Sciences in Lublin, Poland

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