一体式自生动态膜生物反应器的运行特性

Operation characteristics of integrated self-forming dynamic membrane bioreactor

采用涤纶短纤滤布作为分离介质构成一体式动态膜生物反应器(DMBR)处理模拟生活污水,对反应器处理效果、运行特性进行研究。结果表明,在一个运行周期内,分析DMBR的过滤压差和膜通量变化,在运行10h以后,反应器出水水质趋于稳定,动态膜基本形成,膜通量基本维持在37.9L/(m2.h)。DMBR对COD、氨氮、总氮的平均去除率分别为89.00%、82.50%、44.85%,出水浊度维持在1NTU左右,反应器的反冲洗周期为30h左右,出水水质优于城镇污水处理厂污染物排放一级A标准(GB18918—2002),可回用于城镇景观用水等。

Short-staple polyester filter cloth was utilized as the separation medium to develop a submerged dynamic membrane bioreactor （DMBR）. The treatment efficiency and operation characteristics of DMBR were studied. Results showed that the removal efficiency of the DMBR for average COD,NH4^＋-N and total nitrogen were 89.00%,82.50% and 44.85%,respectively,and the effluent turbidity was about 1NTU. The outflow water quality was better than the first grade A required by the discharge standard of pollutants for municipal wastewater treatment plant,and the treated water can be used for town landscape. Analysis in variation of filtration pressure and flux showed that the dynamic membrane could be formed within 10 h with a flux of 37.9L·m^-2·h^-1,and its backwashing period was about 30 h.