TY - JOUR ID - 572 TI - Evaluation of Process Performance and Sludge Properties of an up-flow staged Sludge Blanket (USSB) reactor for Treatment of Molasses Wastewater JO - International Journal of Environmental Research JA - IJER LA - en SN - 1735-6865 AU - Onodera, T. AU - Sase, S. AU - Choeisai, P. AU - Yoochatchaval, W. AU - Sumino, H. AU - Yamaguchi, T. AU - Ebie, Y. AU - Xu, K. AU - Tomioka, N. AU - Mizuochi, M. AU - Syutsubo, K. AD - Center for Regional Environmental Research, National Institute for Environmental Studies, Ibaraki 305-8506, Japan AD - Center for Regional Environmental Research, National Institute for Environmental Studies, Ibaraki 305-8506, Japan- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata 940-2188, Japan AD - Department of Environmental Engineering, Khon Kaen University, Khon Kaen 40002, Thailand AD - Department of Environmental Engineering, King Mongkut’s University of Technology Thonburi, Thailand AD - Department of Civil Engineering, Gifu National College of Technology, Gifu 501-0495, Japan AD - Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata 940-2188, Japan AD - Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Ibaraki 305-8506, Japan Y1 - 2012 PY - 2012 VL - 6 IS - 4 SP - 1015 EP - 1024 KW - USSB KW - Molasses wastewater KW - Sludge property KW - Sludge activity KW - Microbial community structure DO - 10.22059/ijer.2012.572 N2 - A combination of an acidification reactor and an up-flow staged sludge bed (USSB) reactor wasapplied to treatment of molasses wastewater. The USSB, equipped with three gas solid separators, wasselected because of superior organic removal by means of good retention of granular sludge. The combinedsystem was continuously operated at mesophilic (35°C) conditions for 600 days. The USSB achieved a highorganic removal rate of 37 kgCOD/m3 day (organic loading rate of 43 kgCOD/m3 day with 86.2% CODremoval). The USSB retained high sludge concentration of approximately 58 gVSS/L based on the reactorvolume. The retained granular sludge had good settle-ability with a sludge volume index (SVI) of 4 to 20 ml/gSS. The retained sludge possessed a sufficient level of methanogenic activities for acetate (1.2 gCOD/gVSS day) and for hydrogen (1.7 gCOD/gVSS day). Analysis of microbial community revealed that genus Methanobacterium as hydrogen utilizing methanogen and order Methanosarcinales as acetate utilizingmethanogen were detected in the retained sludge of the USSB reactor. The superior performance of the USSB was attributed to good retention of a large amount of granular sludge with high methanogenic activity. UR - https://ijer.ut.ac.ir/article_572.html L1 - https://ijer.ut.ac.ir/article_572_d3eb2999dbd4ba200927803fcb861441.pdf ER -