摘要
辽宁某开发区污水处理厂提标改造工程设计规模为5×10~4m^3/d,排放标准由《城镇污水处理厂污染物排放标准》(GB 18918-2002)二级标准提标至一级A标准。原生化处理采用百乐克(BIOLAK)工艺,通过分析确定改造工艺为五段AO+MBBR工艺,即厌氧+缺氧+好氧+后置缺氧+后置好氧,在缺氧段和好氧段投加MBBR填料,当原水C/N比不足时在后置缺氧段投加乙酸钠以保证总氮达标。改造后实际运行出水水质稳定达到一级A标准。
The design scale of upgrading project of a sewage treatment plant in a development zone in Liaoning Province was 5 × 10~4 m^3/d. The discharge standard was raised from the second level standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) to the first level A standard. The original biological treatment process was BIOLAK process. Through analysis,the modified process was determined to be five-stage AO + MBBR process,namely anaerobic + anoxic +aerobic + anoxic-aerobic. MBBR filler was added in the anoxic and aerobic stages. When the C/N ratio of raw water was insufficient to ensure the total nitrogen removal,sodium acetate was added in the anoxic stage. The quality of the effluent after the modification could reach the first level A standard.
作者
刘强
LIU Qiang(Dalian Municipal Design & Research Institute Co. Ltd.,Dalian 116011,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第16期53-57,共5页
China Water & Wastewater
关键词
五段AO
MBBR
百乐克
提标改造
一级A标准
five-stage AO
MBBR
BIOLAK
upgrading and reconstruction
the first level A standard
