好氧颗粒污泥MBR工艺处理变电站生活污水性能分析

实验对比研究了好氧颗粒污泥膜生物反应器（AGMBR）和传统絮状污泥膜生物反应器（MBR）处理变电站生活污水过程中的膜污染行为及净水性能。以变电站生活污水作为进水，经60 d可以成功培养出好氧颗粒污泥。与传统絮状污泥相比，好氧颗粒污泥能够有效减缓膜污染，尤其是不可逆膜污染。AGMBR水力反洗频率仅为传统MBR的33.3%，30 d连续运行的膜孔阻力仅为传统MBR的69.3%。进一步分析发现，AGMBR反应器中EPS含量显著低于传统MBR，而且EPS中多糖组分含量也远低于传统MBR（仅为MBR的46%）。净水性能对比结果表明，AGMBR对TN和TP有着优异的去除性能，30 d运行平均去除率比传统MBR分别高出37.8%和40.5%。

PERFORMANCE OF AEROBIC GRANULAR SLUDGE MBR PROCESS FOR THE TREATMENT OF SUBSTATION SEWAGE

This study compared the membrane fouling behavior and water purification performance of aerobic granular sludge membrane bioreactor (AGMBR) and traditional flocculent sludge membrane bioreactor (MBR) for the treatment of substation sewage. Using substation domestic sewage as the feed water, aerobic granular sludge could be successfully cultivated after 60 days. Compared with traditional flocculent sludge, aerobic granular sludge could effectively slow down membrane fouling, especially irreversible membrane fouling. In AGMBR, the hydraulic backwash frequency was only 33.3% of that in traditional MBR, and the resistance from pore blocking in 30-day continuous operation was only 69.3% of traditional MBR. Further analysis suggested that EPS content in AGMBR reactor was significantly lower than that of traditional MBR, and the content of polysaccharide in EPS was only 46% of the traditional MBR. The comparison result in water purification performance showed that AGMBR had an excellent removal performance for TN and TP, and the average removal rate of 30-day running was 37.8% and 40.5% higher than that of the traditional MBR, respectively.