【摘要】 通过调整煤热解废水的COD/N,废水中的总氮得到了有效的去除。在COD/N为4、5和6时,总氮的出水浓度分别为(45.67±4.91)mg/L、(13.55±2.96)mg/L和(7.56±2.84)mg/L,COD的出水浓度分别为(92.71±14.13)mg/L、(60.21±9.74)mg/L和(132.08±20.38)mg/L;废水的脱氢酶抑制率在COD/N为5时最低,为0.25,即此时的微生物受到的抑制最小;微生物群落分析表明酚降解菌Ottowia可能利用甲醇作为共代谢基质降解酚类物质,反硝化菌Hyphomicrobium在COD/N为5时的相对丰度为16.44%,高于COD/N为6时的13.32%,即过量的甲醇投加使有机异养菌数量增加,Hyphomicrobium的丰度下降。更多还原

【Abstract】 The total nitrogen(TN)in coal pyrolysis wastewater was efficiently removed by adjusting the COD to nitrogen ratio of the wastewater.The effluent TN concentration was(45.67±4.91)mg/L,(13.55±2.96)mg/L,and(7.56±2.84)mg/L during the COD/N of 4,5,and 6,respectively.And the effluent COD concentration was(92.71±14.13)mg/L,(60.21±9.74)mg/L,and(132.08±20.38)mg/L during the COD/N of 4,5,and 6,respectively.The dehydrogenase inhibition of the wastewater was 0.25 when the COD/N was 5,which lower than that when the COD/N was both 4 and 6.Microbial community analysis indicated that the methanol might be applied by phenol-degrading bacteria Ottowia as the co-metabolic substrate.Hyphomicrobium,as the denitrifying bacteria,exhibited the relative abundance of 16.44% at the COD/N of 5 which was higher than that in COD/N of 6(13.32%),implying that the extra addition of methanol increased the abundance of organic heterotrophic bacteria while decreased the abundance of Hyphomicrobium.更多还原