Effect of Intermittent Aeration and Step-Feed on Nitrogen Removal Performance in Anoxic-aerobic Sequencing Batch Reactor

Year 2019, Volume: 4 Issue: 3, 299 - 307, 30.10.2019

Engin Gürtekin

https://doi.org/10.28978/nesciences.646457

Cited By: 1

Abstract

In this study, it was investigated the effect intermittent aeration and step-feed on nitrogen removal
by providing anoxic-aerobic, anoxic-aerobic-anoxic-aerobic and step-feed anoxic-aerobic-anoxicaerobic working conditions. Chemical oxygen demand (COD) removal efficiency was the same in
all three working conditions and was found to be 91%. The NH4
+
-N removal efficiency is almost
the same. The NH4
+
-N removal efficiencies in the W1, W2 and W3 are 92%, 93% and 95%,
respectively. Total inorganic nitrogen (TIN) removal efficiency increased by 4% when intermittent
aeration was applied. Increasing the efficiency of TIN removal by 24% was achieved by applying
the step-feed intermittent aeration. Experimental results show that the effect of intermittent aeration
on TIN removal was limited and that TIN removal performance with step-feed intermittent aeration
was significantly increased.

Keywords

Sequencing batch reactor, nitrogen removal, intermittent aeration, step-feed

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