环境工程学报2017，Vol.11Issue(11)：5848-5855,8.DOI:10.12030/j.cjee.201608143
同步化学除磷对A2/O工艺除污染效能与活性污泥性能的影响
Effect of simultaneous chemical phosphorus removal on contaminant removal efficiency and activated sludge characteristics in A2/O process
马秋莹 1刘旭林 1封莉 1张立秋1
作者信息
- 1. 北京林业大学环境科学与工程学院,北京100083
- 折叠
摘要
Abstract
In this study,we investigated the effects of different Al2 (SO4) 3 levels on the removal efficiencies of TP,COD,TN,and NH4+-N.We also examined the activated sludge characteristics with the simultaneous chemical phosphorus removal in the A2/O process.The optimal molar ratio of P-to-Al was 0.5 ∶ 1 under normal temperature conditions(from 18 to 32 ℃)and the concentrations of TP,COD,TN,and NH4+-N in the effluent met the first grade A Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).The results of the analysis of the activated sludge characteristics in the aerobic treatment unit showed that the sedimentation performance and the activity of sludge were strengthened and the values of SVI and Zeta potential reduced from 93.8 mL· g-1 to81.3 mL· g-1 and from-5.5 mV to-11.8 mV,respectively.The amounts of Extracellular Polymeric Substances increased by 59.9％,the ratio of protein-to-polysaccharide reduced from 5.2 to 2.1,and the oxygen uptake rate increased from 4.2mg· (g· min)-1to6.7 mg· (g· min)-1(MLSS)The results of the microorganism community structure analysis showed that microbial species reduced from 8 to 6 after Al2 (SO4) 3application.Nitrifying bacteria and denitrifying bacteria ratios decreased while the phosphorus-accumulating organism ratio reached 6％.Under low temperature conditions(from 18 to 32 ℃)and at the molar ratio of P-to-Al of 1∶1,the Al2 (SO4)3dosage should be increased so that the concentrations of TP,COD,TN,and NH4+-N in the effluent could meet the first-grade A standards.关键词
A2/O工艺/同步化学除磷/活性污泥性能/微生物种群结构Key words
A2/O process/simultaneous chemical phosphorus removal/activated sludge characteristics/microorganism community structure分类
资源环境引用本文复制引用
马秋莹,刘旭林,封莉,张立秋..同步化学除磷对A2/O工艺除污染效能与活性污泥性能的影响[J].环境工程学报,2017,11(11):5848-5855,8.
