摘要
溧阳市花园污水处理厂主要收集和处理溧阳主城区南部及部分乡镇的生活污水,设计出水标准执行《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。随着脱氮除磷要求的不断提高,为更好地适应太湖地区城镇污水处理厂新的排放标准,避免造成刚建成投产即面临提标的被动局面,花园污水处理厂设计适度超前,常规处理工艺采用改良厌氧-缺氧-好氧(AAO)工艺,深度处理采用“微絮凝+反硝化深床滤池”工艺,深挖常规处理单元脱氮除磷的潜力,同时预留深度处理单元进一步脱氮除磷空间。建成后,花园污水处理厂运行效果良好,2021年1月—2022年9月,实际出水主要污染物指标优于《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》(DB 32/1072—2018)排放标准,其中,氨氮、COD_(Cr)、TP达到《地表水环境质量标准》(GB 3838—2002)Ⅳ类水标准的达标率分别为96.9%、99.5%、100%,TN质量浓度稳定在10.0 mg/L以下。
Liyang Huayuan wastewater treatment plant(WWTP)mainly collects and treats domestic wastewater of the southern part of Liyang main urban area and some towns.The design effluent standard implements Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918—2002)first class A criteria.With the continuous improvement of nitrogen and phosphorus removal requirements,in order to better adapt to the new discharge standard for municipal WWTP of Taihu Region,and avoid facing the passive situation of upgrading when it is just completed and put into operation,Huayuan WWTP is moderately advanced in design,and the conventional treatment process adopts improved anaerobic-anoxic-aerobic(AAO)process.The advanced treatment adopts"micro-flocculation+denitrification deep-bed filter"process to deeply explore the potential of nitrogen and phosphorus removal in conventional treatment units,while reserving space for further nitrogen and phosphorus removal in advanced treatment units.After completion,Huayuan WWTP has a good operation effect.From January 2021 to September 2022,the main pollutant index of the actual effluent is better than requirement of Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant&Key Industries of Taihu Area(DB 32/1072-2018).The compliance rates of ammonia nitrogen,COD_(Cr)and TP to class IV water standard of Environmental Quality Standards for Surface Water(GB 3838-2002)are 96.9%,99.5%and 100%,respectively,and TN mass concentration is stable below 10.0 mg/L.
作者
罗宏伟
熊顺华
汪勇
陆琳
袁克诚
张力桢
董伟
LUO Hongwei;XIONG Shunhua;WANG Yong;LU Lin;YUAN Kecheng;ZHANG Lizhen;DONG Wei(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Nanjing210000,China;Liyang Water Resources Bureau,Liyang213300,China;China Construction ECO-Environmental Group Co.,Ltd.,Beijing100044,China;Liyang China Construction Water Protection Co.,Ltd.,Liyang213300,China)
出处
《净水技术》
CAS
2023年第10期155-165,共11页
Water Purification Technology
关键词
生活污水
改良AAO工艺
脱氮除磷
反硝化深床滤池
Ⅳ类水标准
domestic wastewater
improved AAO process
nitrogen and phosphorus removal
denitrification deep bed filter
classⅣwater standard
