MBBR工艺预处理黄浦江微污染原水

MBBR Technology for Pretreatment of Micro-polluted Raw Water in Huangpu River

为考察移动床生物膜反应器(MBBR)对黄浦江微污染水的预处理效果而进行了中试,结果表明:MBBR工艺具有良好的生物硝化效果,最大氨氮填料表面负荷可达0.072g/(m2·h);在温度为24.9℃、进水氨氮浓度为3mg/L左右、停留时间为1h、填料填充率为50%的条件下,氨氮去除率可达到77.6%;对CODMn的平均去除率为5%;水温、进水氨氮浓度及停留时间对硝化有一定影响;进水浊度、气水比对氨氮和CODMn去除效果影响不大。

The pretreatment of micro-polluted raw water in Huangpu River by moving bed bio-film reactor (MBBR) was investigated by means of a pilot-scale test.The result shows that favorable effect of biological nitrification can be obtained in MBBR,and the maximum surface load of ammonia nitrogen is 0.072 g/(m^2·h).The average removal rate of ammonia nitrogen was up to 77.6 % under the conditions of temperature 24.9 ℃,the influent ammonia nitrogen 3 mg/L,retention time 1 h,and the suspend packing stuffing rate 50%.The average removal rate of COD_(Mn) is 5%.The water temperature,influent level of ammonia nitrogen,and hydraulic retention time have certain effects on nitrification.The influence of raw water turbidity and the ratio between air and water on removal of ammonia nitrogen and COD_(Mn) is not so great.