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广西师范大学学报(自然科学版) ›› 2021, Vol. 39 ›› Issue (2): 144-153.doi: 10.16088/j.issn.1001-6600.2020061301
唐琳钦1, 王安柳1, 宿程远1,2*, 邓雪1, 赵力剑1, 先云川1, 陈宇1
TANG Linqin1, WANG Anliu1, SU Chengyuan1,2*, DENG Xue1, ZHAO Lijian1, XIAN Yunchuan1, CHEN Yu1
摘要: 研究了尿素(NS)、氯化铵(LA)、丙氨酸(BA)3种氮源对好氧颗粒污泥系统中的氮形态、污泥理化特性及微生物群落的影响。结果表明:LA组好氧颗粒污泥对溶解态氨氮去除率较低,NS组对总氮去除率最高;实验结束时(40 d),NS、LA、BA 3组污泥中的吸附态有机氮与吸附态氮的比值分别为73.28%、44.6%和77.3%,表明以氯化铵为氮源的污泥吸附态有机氮含量最低;好氧颗粒污泥胞外聚合物(EPS)中类色氨酸、辅酶F420峰荧光强度从大到小顺序为BA、NS、LA;在第40 d时BA组污泥亚硝酸盐氧化酶相对20 d时增加了91.8%,而NS和LA组分别增加了2.8%和40.8%,表明以氯化铵为氮源会提高污泥的亚硝酸盐氧化酶活性;微生物群落表明3组中优势菌均为Proteobacteria、Candidatus saccharibacteria、Bacteroidetes,以氯化铵为氮源的污泥Candidatus saccharibacteria丰度最高,丙氨酸的添加会增加脱氮细菌Proteobacteria、Bacteroidetes的丰度;京都基因与基因组百科全书(KEGG)二级通路图表明氨基酸代谢、碳水化合物代谢、膜运输为主要通路,其中BA组氨基酸代谢最高(13.11%)。总体而言,以丙氨酸为氮源的污泥脱氮性能更佳、脱氮功能菌丰度更高。
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