Continuous fill intermittent decant type sequencing batch reactor application to upgrade the UASB treated sewage |
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Authors: | Abid Ali Khan Rubia Zahid Gaur Vasileios Diamantis Beni Lew Indu Mehrotra A. A. Kazmi |
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Affiliation: | 1. Department of Civil Engineering, IIT Roorkee, Roorkee, 246447, India 2. Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece 3. The Volcani Center, Institute of Agriculture Engineering, Beit Dagan, 50250, Israel 4. Department of Civil Engineering, Ariel University Center of Judea and Samaria, Ariel, 40700, Israel
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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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