The current treatment capacity of this wastewater treatment plant(WWTP)is 80 000 m3/d,and the standard of effluent is the national first class B standard.The oxidation ditch+secondary sedimentation tank process is adopted with area coverage of 53 395 m2.The main upgrading process of membrane bio-reactor(MBR)+ultraviolet photocatalytic ozone oxidation combined oxidation is adopted to meet the requirement of no new land use.The scale can be expanded to 180 000 m3/d,and tons of water covered only 0.296 m2/m3.The effluent standard raises to the B standard in Beijing Discharge Standards for Water Pollutants from Urban Sewage Treatment Plants(DB11/890-2012).In full use of the original treatment unit for upgrading reconstruction and expansion,the original coarse screen lifting pump room process is used through expansion,the original oxidation ditch process is transformed into modified anaerobic-anoxic-oxic(AAO)process.The main biochemical unit is successively implemented according to the two series of models of(100 000+80 000)m3/d.Reconstruction and expansion requirements are realized in three stages to achieve uninterrupted water supply and maintain the original effluent standard during construction.Civil construction of pre-treatment and advanced treatment unit according to the long-term construction,the total investment is about 540 million yuan,of which the relevant design ideas can be used as reference for similar projects.
关键词
膜生物反应器(MBR)/紫外光催化臭氧氧化/提标改扩建/不新增用地/不停水
Key words
membrane bio-reactor(MBR)/UV photocatalytic ozonation/upgrading reconstruction and expansion/no new land use/non-stop water supply
维普
万方数据