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Continuous fill intermittent decant type sequencing batch reactor application to upgrade the UASB treated sewage

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Abstract

The performance of continuous flow intermittent decant type sequencing batch (CFID) reactor treating the effluent of an UASB reactor treating domestic wastewater and operated at 8 h hydraulic retention time (HRT) was investigated. The CFID was operated at three different HRTs (22, 8 and 6 h) and three different dissolved oxygen (DO) patterns (<0.5, 2.5–3.5 and 3.5–4.5 mg/L). The highest effluent quality was observed at the 8 h HRT and 2.5–3.5 mg/L DO concentration. At this operational condition, the average BOD, TSS, ammonia nitrogen and fecal coliform removal efficiencies were 83, 90, 74 and 99 %, respectively. The CFID is a promising post-treatment option for existing UASB systems, with a final effluent quality that comply with receiving water and effluent reuse criteria.

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Acknowledgments

The authors would like to thank Prof. Marvyn C. Goronszy, for his critical suggestions and comments made during this study. The authors also extend thanks to the Petroleum Conservation Research Association, an autonomous body of Ministry of Petroleum & Gas, Govt. of India, New Delhi, India for financial supports.

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Correspondence to Abid Ali Khan.

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Khan, A.A., Gaur, R.Z., Diamantis, V. et al. Continuous fill intermittent decant type sequencing batch reactor application to upgrade the UASB treated sewage. Bioprocess Biosyst Eng 36, 627–634 (2013). https://doi.org/10.1007/s00449-012-0831-0

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  • DOI: https://doi.org/10.1007/s00449-012-0831-0

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