Effect of Different Ratios of Acetic Acid to Propionic Acid on Nitrogen Removal Performance in Anoxic-Aerobic Sequencing Batch Reactor

Öz

In this study, the effect of different ratios acetic acid to propionic acid on nitrogen removal performance in anoxic-aerobic sequencing batch reactor was investigated. COD and NH₄⁺-N removal were almost complete at all acetic acid/propionic acid ratios and were not affected by the acetic acid / propionic acid ratio. However, NO₃^--N removal decreased with decrease in acetic acid/propionic acid ratios. Consequently; the total inorganic nitrogen (TIN) removal efficiencies in R1, R2, R3, R4 and R5 were 55%, 52%, 49%, 45% and 43%, respectively. Experimental results show that higher nitrogen removal efficiency is obtained with acetic acid and that the nitrogen removal efficiency decreases as the propionic acid ratio increases in the carbon source.

Anahtar Kelimeler

• Sequencing batch reactor,nitrogen removal,acetic acid,propionic acid,denitrification

Anoksik-aerobik Ardışık Kesikli Reaktörde Azot Giderme Performansına Farklı Asetik Asit/Propiyonik Asit Oranlarının Etkisi

Öz

Bu çalışmada, anoksik-aerobik ardışık kesikli reaktörde azot giderme performansına farklı asetik asit/propiyonik asit oranlarının etkisi araştırılmıştır. KOİ ve NH₄⁺-N giderimi tüm asetik asit/propiyonik asit oranlarında hemen hemen tamamlanmış olup, asetik asit/propiyonik asit oranından etkilenmemiştir. Ancak, NO₃^--N giderimi asetik asit/propiyonik asit oranı azaldıkça azalmıştır. Buna bağlı olarak; R1, R2, R3, R4 ve R5’de toplam inorganik azot (TIN) giderme verimleri sırasıyla % 55, %52, % 49, % 45 ve % 43 olarak bulunmuştur. Deneysel sonuçlar, asetik asit ile daha yüksek azot giderme verimi elde edildiğini ve karbon kaynağında propiyonik asit oranı arttıkça azot giderme veriminin azaldığını göstermiştir.

Anahtar Kelimeler

• Ardışık kesikli reaktör,azot giderimi,asetik asit,propiyonik asit,denitrifikasyon

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