污水处理厂冬季硝化强化与微生物种群分析

发布时间：2018-04-24 15:14

本文选题：污泥龄 + 硝化　；参考：《中国环境科学》2017年09期

【摘要】：针对冬季低温抑制微生物活性导致硝化菌流失的问题,在实际污水处理厂通过两组10万m~3/d的反应池平行运行,考察了延长污泥龄对污水处理厂的出水水质、硝化速率和微生物种群结构的影响.研究结果表明,拉前延长污泥龄能够明显提升低温阶段COD、氨氮和TN的去除效率,硝化速率为对照组的3倍.焦磷酸测序结果表明,延长污泥龄后系统的微生物种群丰度和多样性均显著提高;氨氧化功能菌属Nitrosomonas(1.46%)和亚硝酸盐氧化功能菌属Nitrospira(0.13%)较对照组分别提高了12和13倍;反硝化相关菌属Hyphomicrobium、Thauera、Zoogloea等的相对丰度也明显增加.提前延长污泥龄这一方法能够实现硝化菌的富集,进而提升污水处理的硝化和脱氮效率.
[Abstract]:In view of the problem of nitrifying bacteria loss caused by low temperature inhibition of microbial activity in winter, the effluent quality of sewage treatment plant was investigated by using two groups of 100000 mm2 / 3 / d reactor parallel operation in actual sewage treatment plant, and the effect of prolonging sludge age on effluent quality of wastewater treatment plant was investigated. Effects of nitrification rate and microbial population structure. The results showed that the removal efficiency of COD, ammonia nitrogen and TN at low temperature stage could be obviously increased by prolonging sludge age before drawing, and the nitrification rate was 3 times as high as that of the control group. The results of pyrosequencing showed that the abundance and diversity of microbial population increased significantly after prolonging sludge age, ammonia oxidizing functional bacteria Nitrosomonasum 1.46) and nitrite oxidizing functional bacteria Nitrospiraum 0.13) were 12 and 13 times higher than those of the control group, respectively. The relative abundance of the genus Hyphomicrobium Thauera Zoogloea was also significantly increased. The enrichment of nitrifying bacteria can be realized by prolonging sludge age in advance, and then the nitrification and denitrification efficiency of wastewater treatment can be improved.
【作者单位】：上海城投污水处理有限公司;
【基金】：水体污染控制与治理专项(2013ZX07314-003)
【分类号】：X172;X703

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