Pilot-scale temperate-climate treatment of domestic wastewater with a staged anaerobic fluidized membrane bioreactor (SAF-MBR)
2014
Shin, Chungheon | McCarty, Perry L. | Kim, Jeonghwan | Bae, Jaeho
A pilot-scale staged anaerobic fluidized membrane bioreactor (SAF-MBR) was operated continuously for 485days, without chemical cleaning of membranes, treating primary-settled domestic wastewater with wastewater temperature between 8 and 30°C and total hydraulic retention time (HRT) between 4.6 and 6.8h. Average chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) removals averaged 81% and 85%, respectively, during the first winter at 8–15°C before full acclimation had occurred. However, subsequently when fully acclimated, summer and winter COD removals of 94% and 90% and BOD5 removals of 98% and 90%, respectively, were obtained with average effluent COD never higher than 23mg/L nor BOD5 higher than 9mg/L. Operational energy requirement of 0.23kWh/m3 could be met with primary and secondary methane production, and could be reduced further through hydraulic change. Biosolids production in all seasons averaged 0.051g volatile suspended solids per g COD removed.
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