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

Authors : Engin GÜRTEKİN

Pages : 299-307

Doi:10.28978/nesciences.646457

View : 19 | Download : 13

Publication Date : 2019-10-30

Article Type : Research Paper

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 insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(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