AnGMBR处理低浓度废水的运行特性

采用厌氧颗粒污泥床膜生物反应器（AnGMBR）对模拟生活污水进行处理，并对其运行特性进行研究.结果表明，在室温、进水COD 260mg/L的条件下，AnGMBR的出水COD能稳定维持在30mg/L以下，即使HRT降至5h，系统的出水COD仍满足一级A排放标准.AnGMBR的总甲烷转化量在0.234~0.271L/g COD_去除之间，其进水COD约有61%~70%转化为甲烷.AnGMBR在运行过程中颗粒污泥的粒径、机械强度没有较大的差异，颗粒污泥具有较好的稳定性.经过一段时间的连续运行，AnGMBR的TMP稳定维持在35kPa左右，膜丝在经过清洗后，其性能能够得到有效的恢复.AnGMBR中用于颗粒污泥流化所需的能耗较低，膜滤出水为主要的需能部位，系统各阶段的产能均能满足能耗需求.AnGMBR高效稳定的运行表明，AnGMBR作为一个低耗高效的废水处理系统，具有良好应用潜力.

Characteristics of anaerobic granular sludge bed membrane bioreactor for dilute wastewater treatment

Anaerobic granular sludge bed membrane bioreactor (AnGMBR) with simulated domestic wastewater was studied at room temperature. With the influent COD of 260mg/L, the effluent COD of AnGMBR could remain stable under 30mg/L; Even if the HRT was reduced to 5h, it could still meet the level A Emission Standard. The total methane conversion of AnGMBR was between 0.234 and 0.271L/g COD_R, about 61% to 70% of the influent COD was converted into methane. The particle size and mechanical strength of granular sludge were not different during the operation of AnGMBR, and granular sludge could keep stable. After a period of continuous operation, AnGMBR's TMP kept stable at about 35kPa. The performance of membrane was restored effectively after cleaning. The energy consumption required for the fluidization of granular sludge in AnGMBR was lower, and the permeate water was the main energy consumption required part. The energy output could meet the energy demand. Thus, the AnGMBR system had great potential as an energy positive wastewater treatment system.