添加聚氨酯泡沫载体对用于煤气化废水（CGW）处理的缺氧/好氧膜生物反应器（A/O-MBR）的影响：性能和微生物群落结构。
Effects of polyurethane foam carrier addition on anoxic/aerobic membrane bioreactor (A/O-MBR) for coal gasification wastewater (CGW) treatment: Performance and microbial community structure.
机构信息
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730070, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
出版信息
Sci Total Environ. 2021 Oct 1;789:148037. doi: 10.1016/j.scitotenv.2021.148037. Epub 2021 May 26.
Coal gasification wastewater (CGW) is a typical toxic and refractory industrial wastewater with abundant phenols contained. Two identical anoxic/aerobic membrane bioreactors (with (R2) and without (R1) polyurethane (PU) foam) were carried out in parallel to investigate the role of PU foam addition in enhancing pollutants removal in CGW. Results showed that both systems exhibited effective removal of chemical oxygen demand (>93%) and total phenols (>97%) but poor ammonia nitrogen removal (<35%) constrained by ammonia oxidation process. GC-MS analysis revealed that aromatic and other refractory intermediates were dramatically reduced in R2. Moreover, the PU addition had negligible influence on the total soluble microbial products and extracellular polymeric substances contents but significantly alleviated membrane fouling with the operating time 33% prolonged. Microbial community revealed that Flavobacterium, Holophaga, and Geobacter were enriched on PU. Influent type might be a main driver for microbial community succession.
煤气化废水（CGW）是一种典型的有毒、难处理的工业废水，其中含有丰富的酚类物质。本研究采用了两个相同的缺氧/好氧膜生物反应器（分别为添加聚氨酯（PU）泡沫的 R2 和未添加的 R1）进行平行实验，以探究添加 PU 泡沫对提高 CGW 中污染物去除的作用。结果表明，两个系统都对化学需氧量（COD）（>93%）和总酚（>97%）具有有效的去除效果，但由于氨氧化过程的限制，氨氮去除效果较差（<35%）。GC-MS 分析表明，芳香族和其他难降解中间产物在 R2 中显著减少。此外，PU 添加对总可溶微生物产物和胞外聚合物含量几乎没有影响，但显著缓解了膜污染，使运行时间延长了 33%。微生物群落分析表明，Flavobacterium、Holophaga 和 Geobacter 在 PU 上得到了富集。进水类型可能是微生物群落演替的主要驱动因素。
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