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《Journal of Harbin Institute of Technology》 2011-10
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Analysis on removing and accumulating approach of phosphorus in A/A/O technology

HAO Rui-xia,LI Tong,LIU Feng,LIU Jing(College of Architecture and Civil Engineering,Beijing University of Technology,100124 Beijing, China)  
To improve the scientific management level and effluent quality of a municipal wastewater treatment plant(WWTP),the relationship between the phosphorus removal approach and operating parameters of the A/A/O technology was analyzed by sampling and analyzing samples from the treatment technology process of a WWTP in Beijing,and also the phosphorus material balance was assessed for the sewage treatment system.The results showed that the denitrifying phosphorus removal played remarkably a role for phosphorus removal in the anoxic zone of A/A/O process.The absorption of phosphorus in anoxic zone had exceeded the quantity in the oxic zone.The nitrate concentration in the returned nitrifying liquid had an influence on the denitrifying phosphorus removal.The relationship between phosphorus removal and sludge load,sludge retain time(SRT) showed negative correlation.When the sludge load was about 0.15 kg/(kg·d)and the SRT was about 10-12 d in A/A/O process,the phosphorus removal rate was up to 88%.There was also a negative correlation relationship between the phosphorus accumulation and the sludge emission capacities in the wastewater treatment system.When the sludge emission capacities were controlled to 2.0-2.5 percent inflow of the treatment plant,the phosphorus removal efficiency could be kept on stable and economic status.
【Fund】: 国家自然科学基金资助项目(50778004);; 北京市自然科学基金资助项目(80820006);; 国家水体污染控制与治理科技重大专项(2009ZX07104-006)
【CateGory Index】: X703
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