60000m³d城市污水处理厂设计

Design of 60000m3/d municipal sewage treatment plantAbstract:The output of domestic sewage in a county is about 60000m3/d,among which the designed inlet water quality is CODcr=450mg/L.BODs=260 mg/L;SS =270 mg/L;NH3 -N=45 mg/L;TN =55 mg/L;TP =5.0 mg/L;PH =7-8.Through the analysis of the biodegradability of sewage water quality,it is concluded that the biodegradability of sewage is better,and the method of biological treatment can be adopted for sewage treatment.MSBR process is adopted in the core biochemical treatment part of the design.The grid,pump room and aerated sand settling tank are the first part of the pretreatment.MSBR process reaction pool is the second part.The high density clarifier,rotary table filter and ultraviolet disinfection tank are the third part.The sludge treatment system is the fourth part.After treatment,the eflluent water quality can steadily meet the first-class standard A in discharge standards for pollutants from urban sewage treatment plants(GB 18918-2002).Keywords:domestic sewage;MSBR process;Pollutants.