Effect of aeration cycle on Efficiency of Wastewater Treatment in SBR System

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Kwannate Sombatsompop Pitsanu Poosaenkam Atthasit Kraisawan

Abstract

This work was intended to study the effect of aeration cycle on efficiency of wastewater treatment in Sequencing Batch Reactor (SBR). Ratio of anaerobic to aerobic period was varied at 2:6, 4:4 and 6:2 using a total reaction time of 8 h/cycle. The sludge retention time (SRT) used in this study was 10 days; and synthetic wastewater had COD of 500 mg/l. The results showed that the sludge characteristics with short aeration time were compact and large flocs, and no stalked ciliates-protozoa were observed. The COD removal efficiencies under anaerobic to aerobic ratio of 2:6, 4:4 and 6:2 were 88, 91 and 94%, respectively. The ammonia removal efficiencies under anaerobic to aerobic ratio of 2:6, 4:4 and 6:2 were 75, 53 and 13% respectively. The effluents of nitrite and nitrate were 33, 21 and 3 mg/l, and 30, 14 and 2 mg/l for anaerobic to aerobic ratio of 2:6, 4:4 and 6:2 respectively. The results in this work suggested that the anaerobic to aerobic ratio of 6:2 was the most suitable condition for wastewater treatment in the SBR system.

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How to Cite
Sombatsompop, K., Poosaenkam, P., & Kraisawan, A. (2017, December 4). Effect of aeration cycle on Efficiency of Wastewater Treatment in SBR System. Applied Environmental Research, 30(1), 53-64. Retrieved from //tci-thaijo.org/index.php/aer/article/view/104711
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Original Research