摘要
以软性填料的序批式生物膜法(SBBR)处理市政污水,通入不同强度的电流,考察系统的脱氮效率的变化情况。当电流强度为50mA,水力停留时间7h,厌氧0.5h、曝气3.5h、厌氧/缺氧3.0h时,TN、NH4+-N的去除率均达最大值;当电流为80mA时,TN、NO3--N的去除率分别比不加电流提高了20%、12%。结果表明:一定强度的电流能提高SBBR系统脱氮效能,但过大电流将产生抑制作用;脱氮效率的提高主要是由于电流促进了反硝化脱氮环节。
In order to improve the efficiency of biodenitrification for municipal wastewater. Research to the municipal wastewater treatment in sequencing batch biofilm（SBBR）with soft packing. Pass into the different intensity of current,examine the efficiency of the system changes in nitrogen removal When the current intensity was 50 mA, HRT was 7 h,anaerobic was 0.5 h,aeration was 3.5 h,anaerobic / anoxic was 3h.the removal rate of TN and NH＋-N both reach the maximum; When the current is 80mA the removal efficiency of TN and NO3^--N were increased by 20 % and 12% compared without current respectively. The results show that a certain intensity of current can im prove the performance of SBBR system denitrification, but after a large current will result in inhibition;the improve of nitrogen removal efficiency was mainly due to current promoted denitrification links.
出处
《三峡环境与生态》
2010年第6期5-8,29,共5页
Environment and Ecology in the Three Gorges
基金
国家"十一五"科技支撑计划项目
西南大学科技创新基金(0924005)
