好氧颗粒污泥膜生物反应器处理畜禽废水

采用好氧颗粒污泥膜生物反应器处理畜禽废水,分别对COD、NH4 -N、NO2--N、NO3--N的去除效果和对膜通量的影响进行了研究。结果表明:在水力停留时间(HRT)为8h,进水COD浓度为600mg/L,NH4 -N浓度为40mg/L的条件下,出水COD、NH4 -N的浓度分别为46.6和4.8mg/L。NO2--N和NO3--N的去除率也可达90%以上。并且好氧颗粒污泥的加入减缓了膜的污染。

Application of Membrane Bioreactor Seeded with Aerobic Granular Sludge for Livestock Farm Wastewater Treatment

Nitrogen and organic substances in the synthetic livestock farm wastewater were efficiently removed by using an aerobic granular sludge membrane bioreactor where biofilm was fixed on a hollow-fiber membrane. The effluent COD and NH 4-N concentration were 46.6 mg/L and 4.8 mg/L on average under the conditions of HRT 8 h, the volume load of COD 600 mg/L, and the concentration of ammonia nitrogen 40mg/L. The removal efficiency of nitrate nitrogen and nitrite nitrogen were approximately 90%. In addition, the introduction of aerobic granules into the MBR system was beneficial to controlling membrane fouling.