A2O设施处理长三角平原地区农村生活污水的效果
- Title:
- Performance of A2O Facilities for Rural Domestic Sewage Treatment in Yangtze River Delta Plain
- 关键词:
- font-size: 10pt; ">A font-size: 10pt; "> 2O; 农村生活污水; 脱氮除磷; 长三角平原地区
- Keywords:
- font-size: 10pt; ">anaerobic-anoxic-oxic (A font-size: 10pt; "> 2 O); rural domestic sewage; nitrogen and phosphorus removal; Yangtze River Delta plain
- 摘要:
-
厌氧/缺氧/好氧（A2O）设施在长三角平原地区农村生活污水处理中应用广泛，此次调研了5个镇39个A2O设施对污染物的去除效果和进水量。结果表明，A2O设施进水COD、氨氮、TN、TP的浓度分别为（95±80）、（56.2±40.0）、（61.6±40.1）、（4.6±2.8） mg/L，部分设施进水浓度较低，说明污水收集有问题。由于进水量不稳定，A2O设施受降雨量影响很大，与设计规模有较大偏差。A2O设施对COD、氨氮、TN、TP的去除率分别为(46.9±30.5)%、(46.0±37.3)%、(19.7±18.7)%和(25.1±21.9)%，各设施之间对污染物的去除情况差别很大，出水COD达标率较高，但氮、磷达标率较低。进水COD浓度低引起的有机负荷与进水COD/TN值偏低、雨污分流不彻底引起的较大水力冲击负荷、进水水质水量波动大、设施运维工作不到位引起的生物脱氮除磷效果不佳，是A2O设施应用效果不理想的重要原因。
- Abstract:
-
Anaerobic-anoxic-oxic (A2O) facilities are widely applied in rural domestic sewage treatment in the Yangtze River Delta plain. Pollutants removal performance and influent flow rate of 39 A2O facilities in five towns were investigated. The influent concentrations of COD, ammonia nitrogen (NH 3 -N),total nitrogen (TN)and total phosphorus (TP) were (95±80) mg/L,(56.2±40.0) mg/L,(61.6±40.1) mg/L and (4.6±2.8) mg/L, respectively. The very low influent concentration in some facilities indicated that there was a problem in sewage collection. Due to the unstable influent flow rate, the A2O facilities were greatly affected by rainfall and deviated from the design capacity.The removal rates of COD, NH3-N, TN and TP by the A2O facilities were (46.9±30.5)%, (46.0±37.3)%, (19.7±18.7)% and (25.1±21.9)%, respectively,and the removal performances varied greatly among facilities. The standard achieving rate of effluent COD was high, but those of effluent nitrogen and phosphorus were low. Important reasons for the poor performance of the facilities were as follows: the too low organic load and influent COD/TN ratio caused by the low concentration of influent COD, high shocking load caused by incomplete diversion of rain and sewage, dramatic fluctuation in quality and quantity of the influent, as well as poor biological removal of nitrogen and phosphorus caused by inadequate operation and maintenance of the facilities.
相似文献/References:
[1]孙永利,张维,郑兴灿,等.城镇居民人均日生活污水污染物产生量测算之产污规律[J].中国给水排水,2020,36(6):1.
[2]范荣桂,刘娜,尹利鹏,等.污泥厌氧催化快速发酵产VFAs的试验研究[J].中国给水排水,2020,36(11):69.
[3]镇祥华,余琴芳,万年红,等.污水处理厂二级出水深床滤池超深度脱氮研究[J].中国给水排水,2020,36(11):91.
[4]赵美玲,朱涛,冯江,等.水力模型在合流制调蓄池进水管改造中的应用[J].中国给水排水,2020,36(7):114.
[5]朱一文,王文亮.基于水文方法的暴雨调节塘规模计算[J].中国给水排水,2020,36(7):118.
[6]李骏飞,李欢,杨磊三.粤港澳大湾区创新治水模式分享[J].中国给水排水,2020,36(8):1.
[7]李激,王燕,熊红松,等.城镇污水处理厂消毒设施运行调研与优化策略[J].中国给水排水,2020,36(8):7.
[8]赵锡锋,李兴强,李军.好氧颗粒污泥技术中试研究及应用进展[J].中国给水排水,2020,36(8):30.
[9]王建西.PTA2O工艺用于养猪废水处理及其Anammox现象分析[J].中国给水排水,2020,36(8):56.
[10]高海英,邓磊,侯晓庆,等.MBR工艺在西安经开草滩污水处理厂中的应用[J].中国给水排水,2020,36(8):63.
[11]莫俊锋,王文亮,白献宇,等.基于设计暴雨法的CSO调蓄池池容计算方法探讨[J].中国给水排水,2020,36(8):77.
[12]郭健.纳入大直径热力管的综合管廊设计研究[J].中国给水排水,2020,36(8):82.
[13]蒙政成,冼萍,黄付平,等.NCMBR工艺在工业园区污水处理工程中的应用[J].中国给水排水,2020,36(8):88.
