大连理工大学学报2025，Vol.65Issue(3)：228-234,7.DOI:10.7511/dllgxb202503002
PND-SNAD工艺处理污泥消化液实际工程启动研究
Study of start-up of full scale PND-SNAD project for treating sludge digestion liquor
摘要
Abstract
In response to the challenges faced by the simultaneous nitritation-anammox-denitrification(SNAD)process in practical engineering applications,including susceptibility to fluctuations in water quality and quantity,a combined process of partial nitritation and denitrification(PND)with SNAD is constructed for treating sludge digestion liquor.During the continuous 197-day operation,the water volume is gradually increased,ultimately reaching a design capacity of 400 m3/d.The effluent concentrations of COD and TN are 421.1 and 330.9 mg/L,with COD and TN removal efficiencies of 80.3％and 88.0％,respectively.The PND-SNAD process is successfully started.Carbon and nitrogen balance analysis reveals that the PND unit contributes 65.9％to COD removal and 42.6％to TN removal,reducing the effluent NH4+-N concentration to 514.0 mg/L,which effectively improves the influent quality to the SNAD unit.In the SNAD unit,82.1％of TN is removed through the anammox pathway.High-throughput sequencing results reveal that the relative abundance of ammonia-oxidizing bacteria(0.194％)in the PND unit's flocculent sludge is significantly higher than that of denitrifying bacteria(0.063％),which favors nitritation.Candidatus Brocadia is the dominant anammox bacterium,significantly enriched on the biofilm of the SNAD unit(relative abundance of 22.44％).关键词
污泥消化液/部分亚硝化-反硝化(PND)/同步亚硝化-厌氧氨氧化-反硝化(SNAD)/脱氮除碳/微生物群落Key words
sludge digestion liquor/partial nitritation and denitrification(PND)/simultaneous nitritation-anammox-denitrification(SNAD)/nitrogen and carbon elimination/microbial community分类
环境科学引用本文复制引用
周月,徐晓晨,柳丽芬,赵凯歌,杨蒙,杨凤林..PND-SNAD工艺处理污泥消化液实际工程启动研究[J].大连理工大学学报,2025,65(3):228-234,7.基金项目
国家自然科学基金资助项目(21777018). （21777018）
