A^2/O系统中碳、氮、磷的物料平衡分析  

Analysis on Mass Balance of Carbon,Nitrogen and Phosphorus in A^2/O Process

作　　者：黄满红[1,2] 李咏梅[2] 顾国维[2] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]同济大学国家污染控制与资源化重点实验室,上海200092

出　　处：《中国给水排水》2009年第13期41-44,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50138010;50570114);上海市重点学科建设项目(B604);东华大学校基金资助项目(113-10-0044018)

摘　　要：通过考察水力停留时间(HRT)和泥龄(SRT)对A2/O系统去除碳(C)、氮(N)、磷(P)的影响,对系统的运行参数进行优化,并分析了C、N、P三种元素在最佳工况下的物料平衡和质量分布。结果表明,HRT对系统去除COD、TN和TP的影响不大,当HRT>8h时,系统对各指标的去除率已基本不再变化;系统对TN的去除率随SRT的减小而减小,对TP的去除率随SRT的减小而增大,对COD的去除率受SRT的影响较小;综合考虑系统的除碳脱氮除磷效果,确定最佳的HRT为8h、SRT为15d,此时系统中C、N和P的平衡百分比分别为82.2%、95.2%和95.1%,其中进水COD主要以CO2的形式(66.2%)被去除,TN主要以N2的形式(59.0%)被去除,TP主要由剩余污泥(84.4%)带出系统。Through investigating the influence of hydraulic retention time （HRT） and sludge retention time （SRT） on the removal of carbon （C）, nitrogen （N）, phosphorus （P） by A^2/O system, the operating parameters of the system were optimized, and the mass balance and distribution of C, N, P under the optimal conditions were analyzed. The results show that HRT has no significant effect on the removal of COD, TN and TP. When HRT is higher than 8 h, the removal rate of any indicators is not basically changed, The removal rate of total nitrogen is decreased and the removal rate of total phosphorus is increased with the decrease of SRT, and the removal rate of COD is less affected by the SRT. Consider- ing the removal effects of carbon, nitrogen and phosphorus in the system comprehensively, it is determined tha（ the optimal HRT is 8 h, SRT is 15 d. At this point, the mass balance rates of C, N and P are 82.2%, 95.2% and 95.1%, respectively. The influent COD is removed mainly in the form of CO2 （66.2%）, TN is removed mainly in the form of N2 （59.0%）, TP is removed mainly with the excess sludge （84.4%）.

关 键 词：A2/O系统 碳 氮 磷 物料平衡 

分 类 号：X703[环境科学与工程—环境工程]