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Research on Operation Efficiency and Membrane Fouling of A2/O-MBR in Reclaimed Water Treatment

机译：A2 / O-MBR在再生水处理中的运行效率和膜污染研究

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Taking the public building domestic wastewater as an example, the combination of the MBR (membrane bioreactor) process and the traditional A /O (anaerobic-anoxic-oxic) process was established and analyzed in terms of the removal effect of the pollutants, the impact of the microbial community changes on the process, the MBR membrane fouling, the cleaning methods, and the cleaning performance. The results indicated that the effluent water quality of the domestic wastewater treated with the A /O-MBR process was stable and met the emission requirement to the natural water body. There was good microbial diversity in raw water, the anaerobic tank, the anoxic tank, the aerobic MBR tank and the disinfection tank, and the aerobic MBR tank has a wide variety of aerobic microorganisms, which elevates the removal of organics and the nitrification of ammonia nitrogen and ensures the qualification of nitrogen and phosphorus indexes of the system effluent water. For the fouled membrane, the surface of the contaminated membrane was covered by macromolecular contaminants, causing the membrane flux to drop, and after different cleaning methods to the membrane were compared, it was discovered that the combined use of cleaning agents had better effects than the single ones, and the cleaning method of sodium hydroxide followed by hydrochloric acid showed the best effect, achieving a membrane flux restoration ratio above 80% after cleaning.
机译：以公共建筑生活污水为例，建立了MBR（膜生物反应器）工艺与传统A / O（厌氧-缺氧-氧化）工艺的结合，并从污染物的去除效果，影响等方面进行了分析。微生物群落的变化对过程，MBR膜结垢，清洁方法和清洁性能的影响。结果表明，采用A / O-MBR工艺处理的生活污水的出水水质稳定，符合自然水体的排放要求。原水，厌氧池，缺氧池，需氧MBR池和消毒池中的微生物多样性良好，需氧MBR池中有多种需氧微生物，从而提高了有机物的去除和氨的硝化作用氮，确保系统污水中氮和磷指标合格。对于结垢的膜，被污染的膜的表面被大分子污染物覆盖，导致膜通量下降，并且在对膜进行不同的清洗方法进行比较之后，发现清洗剂的组合使用比清洗膜的效果更好。单次清洗，用氢氧化钠加盐酸清洗的方法效果最好，清洗后膜通量恢复率达到80％以上。

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