Operation and Optimization of the Parallel AN/AO Process
The parallel AN/AO process, first proposed by the authors to efficiently use denitrifying phosphorus removing bacteria, was briefly introduced in the paper. Key operational parameters I.e. Influent feed ratio of AN unit vs. AO unit, internal mixed liquid suspended solids (MLSS) return ratio (IMRR), external sludge return ratio (ESRR), sludge retention time (SRT) and hydraulic retention time (HRT) were optimized and determined as 12:8, 200％, 25％, 15 days and 6 hours respectively. Mass balance of main pollutants such as chemical oxygen demand (CODcr), total nitrogen (TN) and total phosphorus (TP) were conducted to demonstrate environmental fates of pollutants and to evaluate optimization potential of different compartments. The process operated under optimal parameters achieved pollutants removal efficiency of 74％, 99％, 68％, and 83％ in COD, NH3-N, TN and TP respectively. Effluent COD, NH3-N, TN and TP concentrations were 49.1 mgL-1, 0.4 mgL-1, 14.8 mgL-1, and 0.8 mgL-1 comparing to influent concentrations 186.7 mgL-1, 37.8 mgL-1，46.2 mgL-1, and 4.7 mgL-1 respectively. Effluent of the process can meet the Discharging Standards for Chinese Urban WWTPs (GB18918-2002) first grade (B) stably.
Enhanced biological phosphorus removal (EBPR) Parallel AN/AO process Denitrifying phosphorus removing bacteria (DPB) parameter optimization
Hong-bo LIU Le-jun SHI Si-qing XIA Wen-ping CAO
State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,200092 Shanghai,P.R.C Department of Municipal Engineering of Henan University of Urban Construction,467044,Pingdingshan,P. Department of Municipal Engineering of Henan University of Urban Construction,467044,Pingdingshan,P.
国际会议
北京
英文
1-8
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）