Operation characteristics and microbial community of modified UNITANK process in winter
GU Xiaodan1,2,, HUANG Yong1,2,,, DING Yongwei3, HUANG Jihui4, WANG Wei4, ZHANG Jun4, CHEN Fangfang4 1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China 2.National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou 215009, China 3.Suzhou Water Group Co. Ltd., Suzhou 215001, China 4.Suzhou Drainage Co. Ltd., Suzhou 215001, China
Abstract:To solve the problem of large fluctuation of effluent quality from modified UNITANK process in a Suzhou municipal sewage treatment plant in winter, periodical operation characteristics of the modified UNITANK was analyzed by the model. The high-throughput sequencing of Illumina MiSeq was used to analyze the microbial community structure of activated sludge in the modified UNITANK in winter. The results showed denitrification was sufficient in the anoxic zone, uniform aeration in the edge tank led to inadequate nitrification in the front and middle of the edge tank, ammonia and soluble phosphate in the periodic effluent gradually increased. The analysis of microbial community structure indicated that the microbial diversity was higher than other seasons, which was related to the unique process operation mode. Saprospiraceae, Nitrosomonas and Nitrospira were the dominant bacteria in the activated sludge in winter, which ensured the performance on the biological removal of nitrogen and phosphorus in the modified UNITANK process. Key words:modified UNITANK process/ winter/ model/ community structure/ operating characteristic.
图1改良型UNITANK工艺平面布置图 Figure1.Layout of modified UNITANK process
图2上半周期改良型UNITANK工艺沿程氨氮、${\bf{NO}}_3^ - $-N、${\bf{SPO}}_4^{3 - }$-P的变化 Figure2.Changes of ammonium, ${\rm{NO}}_3^ - $-N and ${\rm{SPO}}_4^{3 - }$-P concentration along the modified UNITANK process in the first half period
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1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China 2.National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou 215009, China 3.Suzhou Water Group Co. Ltd., Suzhou 215001, China 4.Suzhou Drainage Co. Ltd., Suzhou 215001, China Received Date: 2021-02-27 Accepted Date: 2021-05-26 Available Online: 2021-07-23 Keywords:modified UNITANK process/ winter/ model/ community structure/ operating characteristic Abstract:To solve the problem of large fluctuation of effluent quality from modified UNITANK process in a Suzhou municipal sewage treatment plant in winter, periodical operation characteristics of the modified UNITANK was analyzed by the model. The high-throughput sequencing of Illumina MiSeq was used to analyze the microbial community structure of activated sludge in the modified UNITANK in winter. The results showed denitrification was sufficient in the anoxic zone, uniform aeration in the edge tank led to inadequate nitrification in the front and middle of the edge tank, ammonia and soluble phosphate in the periodic effluent gradually increased. The analysis of microbial community structure indicated that the microbial diversity was higher than other seasons, which was related to the unique process operation mode. Saprospiraceae, Nitrosomonas and Nitrospira were the dominant bacteria in the activated sludge in winter, which ensured the performance on the biological removal of nitrogen and phosphorus in the modified UNITANK process.
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