TY - JOUR ID - 489 TI - Comparative Study on Startup Performance of UAHR and UASB Reactors in Anaerobic Treatment of Distillery Spentwash JO - International Journal of Environmental Research JA - IJER LA - en SN - 1735-6865 AU - Selvamurugan, M. AU - Doraisamy, P. AU - Maheswari, M. AU - Nandakumar, N.B. AD - Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore - 641 003, Tamil Nadu, India Y1 - 2012 PY - 2012 VL - 6 IS - 1 SP - 235 EP - 244 KW - Upflow Anaerobic Hybrid Reactor KW - Upflow Anaerobic Sludge Blanket reactor KW - startup performance KW - Steady state condition KW - biogas production DO - 10.22059/ijer.2011.489 N2 - In this paper, startup performance of Upflow Anaerobic Hybrid Reactor and Upflow Anaerobic Sludge Blanket reactors in anaerobic treatment of distillery spentwash has been studied under identical conditions of operation. Various effluent characteristics like pH, Electrical Conductivity, Chemical Oxygen Demand, Biochemical Oxygen Demand and Total Solids and other process parameters like biogas production and methane per cent in biogas were studied until the attainment of steady state. The startup of the reactors has been completed and steady state condition attained on 25th day of reactor operation in UAHR and 34th day in UASB reactor. The treated effluent characteristics of both reactors were fairly steady after attaining the steady state condition. The pH of treated effluent during steady state condition was almost neutral for both reactors even though the influent had an acidic pH. The maximum COD, BOD and TS removal efficiencies were as high as 79.60%, 87.39% and 69.96% in UAHR as compared with UASB of 72.98%, 81.34% and 66.23%, respectively during the steady state period. The maximum volumetric gas production of 149 L m-3 produced more in UAHR than in UASB reactor during steady state condition. The population of total anaerobic bacteria and methanogenic bacteria also more as that of the other parameters in UAHR than in UASB reactor and it were 55.2 x 103 ml-1 and 40.0 x 102 ml-1 respectively in UAHR. It is found that from an overall assessment the UAHR has proved superior in its performance compared to the UASB reactor during the startup process. UR - https://ijer.ut.ac.ir/article_489.html L1 - https://ijer.ut.ac.ir/article_489_ff37cb9d31092cb228064823914800ca.pdf ER -