Application of segmented inlet multi-stage AO-MBR process in underground wastewater treatment plant
A underground WWTP with a design scale of 60 000 m3/d in northern China adopted the multi-stage A/O process and MBR process for inlet water,and the effluent quality met the re-quirements of standard B in the Discharge Standard of Water Pollutants for Urban Sewage Treat-ment Plants(DB 11/890-2012).The total investment of the project is 462.76 million yuan.The total cost of water treatment is 3.26 yuan/m3,of which the variable cost is 0.918 yuan/m3,and the fixed cost is 2.342 yuan/m3.Since commercial transport,the design process has been efficient and stable.The average discharge concentrations of COD,TN,NH4-N and TP in effluent are 13 mg/L,10.6 mg/L,0.24 mg/L and 0.2 mg/L,and the average removal rates are 93％,78.6％,99.5％and 96％,respectively.The high quality of the water plant ensures the supply of recycled water in the planned service area,effectively ensuring the sustainable use of recycled water resources in the area.
Underground wastewater treatment plantMulti-stage AOMBRReclaimed water
万方数据
维普
