低温条件下反硝化脱氮过程优化及其在污水处理厂冬季运行中的应用研究

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中图分类号：X321 文献标识码：A 文章编号：1008-9500（2025）10-0061-03

DOI： 10.3969/j.issn.1008-9500.2025.10.018

Abstract： The denitrification eficiency significantly decreases under low temperature conditions，becoming the main challeng in winter operation of sewage treatment plants.This paper combines laboratory simulation and enginering practice to systematicallyoptimize the denitrification processfrom theaspects of temperature regulation，carbon source optimization，domesticationofdenitrifying bacteria，andadjustmentofprocessparameters.Theresearchresults indicate that by adopting measures such asconstant temperature insulation，precise addition of sodium acetate，enrichment of lowtemperatureresistantbacterialcommunities，andoptimizationofrefluxratioand hydraulicretentiontime intheanoxic tank， thedenitrificationeiciencyissigficantlyimproed，andthetotalnitrogenconcentratiointeefuentisableades the Class A discharge standard.

Keywords：denitrification;wastewater treatment; total nitrogen removal

随着社会经济的发展和城市化进程的加快，污水处理的需求日益增长。（剩余3531字）