The Effect of Limited Ammonium Variations on Biological Nitrogen Removal Process

Yıl 2018, Cilt: 21 Sayı: 1, 81 - 87, 01.01.2018

Serdar Göçer Dilek Akman Kevser Cırık

https://doi.org/10.18016/ksudobil.293209

Öz

The aim of this study was to investigate the effect of
varying limited ammonium concentrations on the heterotrophic
denitrification process responsible for biological nitrogen removal. The system
performance was evaluated with gradually decreasing ammonium-nitrogen
concentrations from 20 mgNH₄⁺-N L^-1to
inexistent ammonium inlet at 100 mgNO₃^- L^-1.
Results of this study indicated that the total nitrogen removal efficiency
reached maximum level at influent ammonium-nitrogen of 5 mg L^-1due
to the absence of residual ammonium at the end of the reaction, although
varying ammonium concentrations did not noticeably affect the nitrate removal
efficiency. Additionally, nitrate consumption rate had a tendency to increase with the limitation
of influent ammonia and the nitrate consumption rate reached maximum
level at operational condition where ammonium was not present, corresponding to
85.4 mgNO₃^--N gMLSS^-1h^-1. The
maximum ammonium consumption rate have attained with influent ammonium-nitrogen
of 5 mg L^-1, being 18.4 mgNH₄⁺-N gMLSS^-1h^-1.

Anahtar Kelimeler

Ammonium consumption, heterotrophic denitrification, biological nitrogen removal, nitrate consumption rate

Biyolojik Azot Giderim Prosesinde Sınırlı Amonyum Değişiminin Etkisi

Öz

Bu çalışmanın temel amacı, biyolojik azot gideriminden sorumlu
heterotrofik denitrifikasyon prosesinde değişen sınırlı amonyum
konsantrasyonlarının etkisini araştırmaktır. Sistem performansı 100 mg NO₃^-
L^-1 sabit giriş nitrat konsantrasyonunda 20 mgNH₄
⁺ -N L^-1'den kademeli olarak azalan amonyum azotu
konsantrasyonları ile değerlendirilmiştir. Bu çalışmanın sonuçları, amonyum
konsantrasyonlarındaki değişimin nitrat giderme etkinliğini belirgin bir
şekilde etkilememesine rağmen, reaksiyonun sonunda kalıntı amonyum bulunmaması
nedeniyle 5 mg L^-1'lik giriş amonyum-azotu konsantrasyonunda toplam
azot giderim veriminin maksimum seviyeye ulaştığını göstermiştir. Buna ek
olarak, nitrat tüketim hızı giriş amonyum konsantrasyonun sınırlanması ile
artış eğiliminde iken, amonyum bulunmayan işletim koşulunda nitrat tüketim
hızı, 85,4 mg NO₃^--N gMLSS^-1 sa^-1olarak
maksimum seviyeye ulaşmıştır. Maksimum amonyum tüketim oranı, 5 mgL^-1'lik
amonyum azotuyla, 18,4 mg NH₄⁺-N gMLSS sa^-1
olarak elde edilmiştir.

Anahtar Kelimeler

Amonyum tüketim, biyolojik azot giderimi, heterotrofik denitrifikasyon

Kaynakça

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