不同盐度下活性污泥中微生物群落变化规律及其处理模拟染料废水

发布时间：2018-03-11 19:22

本文选题：盐度　切入点：活性污泥　出处：《环境科学》2017年07期 　论文类型：期刊论文

【摘要】：通过逐渐提高SBR反应器中活性污泥的盐度,探索不同盐度下活性污泥的活性、性质及其微生物群落变化,并研究结晶紫废水以及纳米四氧化三铁对微生物群落的影响.结果表明,随着盐度的增加,活性污泥的COD、氨氮去除率以及污泥体积指数SVI值均降低,在质量分数2%的盐度下,COD、NH_4~+-N的去除率为80%和75%,SVI值不足35 mL·g~(-1);随着盐度的增加微生物的多样性逐渐减少,系统中革兰氏阴性菌优势菌种的位置逐渐被真菌和放线菌取代,而革兰氏阳性菌依然为优势菌;加入结晶紫染料的活性污泥与盐度为2%的活性污泥样品相比发现:红细菌属、丽水菌属含量有所增加,产黄杆菌、农杆菌属含量减小.加入MNPs的结晶紫-活性污泥与不加MNPs的结晶紫活性污泥对比:酸胞菌属、产黄杆菌含量增加,红细菌属、农杆菌属含量减小.
[Abstract]:By gradually increasing the salinity of activated sludge in SBR reactor, the activity, properties and microbial community changes of activated sludge under different salinity were explored. The effects of crystal violet wastewater and nano-Fe _ 2O _ 3 on microbial community were studied. The results showed that the COD, NH3-N removal efficiency and SVI value of activated sludge decreased with the increase of salinity. Under the salinity of 2%, the removal rate of COD4 ~ -N was 80% and 75% SVI was less than 35 mL 路g ~ (-1). With the increase of salinity, the diversity of microorganisms gradually decreased, and the dominant species of Gram-negative bacteria were gradually replaced by fungi and actinomycetes. However, Gram-positive bacteria were still the dominant bacteria, and the addition of crystal violet dye to activated sludge samples showed that the red bacteria, Lishui bacteria and xanthobacterium were higher than those of the activated sludge samples with salinity of 2%. The content of Agrobacterium decreased. The content of acidocystis, xanthobacterium and Agrobacterium decreased with the addition of MNPs.
【作者单位】：青岛科技大学环境与安全工程学院;
【基金】：山东省自然科学基金项目(ZR2013EEL008)
【分类号】：X172;X703

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