摘要
湖北省某污水处理厂处理规模3×10^(4) m^(3)/d,设计出水要求达到国家标准《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A标准,该污水处理厂提标面临占地受限问题。采用“MBBR-高效沉淀过滤工艺”,紧密结合现状工艺设施对现有CAST工艺进行改造,生化池原位镶嵌MBBR工艺,无需新增构筑物,深度处理单元采用高效沉淀过滤工艺,在极小占地条件下完成实施,保证SS和TP的稳定高效去除。改造后出水COD_(Cr)、BOD_(5)、SS、TN、TP、NH_(3)-N平均浓度分别低于20、5.5、8.8、12、0.28、2.4 mg/L,出水水质浓度稳定优于设计出水标准,部分指标可达到地表准IV类标准。“MBBR-高效沉淀过滤工艺”具有简洁集约、稳定高效的特点,适用于占地受限污水厂的改扩建或新建。
To retrofit a wastewater treatment plant with the capacity of 3×10^(4)m^(3)/d in Hubei Province,its effluent is designed to meet the Class 1-A level specified in“Discharge standard of pollutants for urban wastewater treatment plants”(GB 18918-2002)whilst facing a trouble of limited land availability.An MBBR-high efficiency precipitation filtration process is adopted to retrofit the current CAST process whilst being closely integrated with the existent process facilities.The biochemical tank is embedded with MBBR process in situ without any additional structure needed.In order to ensure the stable and efficient removal of SS and total phosphorus,the high efficiency precipitation filtration process is used as an advanced treatment unit within a minimal space.Through the retrofitting,average concentration of COD_(Cr),BOD_(5),SS,total nitrogen,total phosphorus and ammonia-nitrogen in the effluent could be lower than 20,5.5,8.8,12,0.28 and 2.4 mg/L,respectively,i.e.,the effluent strength could keep at stable level superior to its design standard,or even part of variables could tend to attain the Category IV of surface water standard.A feature of the MBBR-high efficiency precipitation filtration process is concise,intensive,stable and efficient,so as to be applicable to retrofitting,expanding or newly constructing a WWTP with limited space available.
作者
郑潭
Zheng Tan(North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300000)
出处
《上海环境科学》
2023年第2期76-80,共5页
Shanghai Environmental Sciences
关键词
移动床生物膜反应器
高效沉淀过滤工艺
提标改造
脱氮除磷
Moving bed biofilm reactor(MBBR)
High efficiency precipitation filtration process
Upgrading and retrofi tting
Denitrification and phosphorus removal
