EFFECT OF TEMPERATURE ON METHANOGENIC TREATMENT OF REAL SEWAGE TREATMENT USING AnMBR

Abstract

 The activated sludge treatment of sewage has disadvantages such as energy consumption due to aeration and generation of a large amount of excess sludge. The anaerobic membrane bioreactor(AnMBR) is attracting attention as a new wastewater treatment technology because it is energy-saving / energy-creating process and has a small amount of sludge production. In this study, a continuous treatment experiment of AnMBR treatng real sewage was conducted by changing the operating temperature and hydraulic retention time (HRT). The effect of temperature on treatment performance and biogas production was evaluated, and the COD mass balances at different conditions were identified. At a condition of HRT6 h and operating temperature 20 °C, a good treatment performance such as effluent BOD< 20 mg/L, effluent COD< 50 mg/L and removal efficiency >90% was achieved. At a condition of HRT6 h and operating temperature 25 °C, the biogas production was 0.079 L-gas / L-sewage. The amount of sludge produced by AnMBR method was less than that of the activated sludge treatment process even under high load conditions or low temperature conditions.