摘要
常温（26～30℃）下应用连续流短程硝化反硝化工艺处理模拟城市生活污水，对连续流短程硝化反硝化污泥的运行参数进行了研究。结果表明，在常温、进水NH4^＋-N为50mg／L、曝气区pH为7．5～8．0、曝气量为0．3L／min、曝气区水力停留时间为4h的条件下，NO2^--N／（NO3^--N＋NO2^--N）达0．677，TN去除率为35％左右；在上述条件下，无需调节曝气区pH，选择前置反硝化区与曝气区的体积比为1：2、前置反硝化区水力停留时间为2h、回流比为2：1时，连续流短程硝化反硝化工艺的TN去除率达86．9％，COD去除率达92．7％；pH的变化规律正确反映了系统运行状况，可作为系统运行的实时控制参数。
A lab scale continuous flow shortcut nitrification-denitrification A/O system was employed for treating the artifical municipal wastewater. The effects of operating parameters （ammonia loading, HRT, A ： O volume ratio, recycle rate） on the treatment performance were determined. Operating at 26-30℃, feed ammonia concentration of 50 mg/L, HRT of 4 h in aerobic zone and air flow of 0.3 L/min, the ratio of NO2^--N/（ NO3^ -N ＋ N2^- -N）reached 0. 677;however, the removal efficiency of TN was about 35%.When the volume ratio of the pre-denitrification （A） zone to the aerobic （O） zone was 1：2 and operating at a recycle ratio of 2 ： 1, the TN removal went up to 86.9% while 92.7% of COD was also removed. The results show that pH, an indicator of the instantaneous system performance, is an useful parameter for real time control of the treatment operations.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第4期6-9,共4页
Environmental Pollution & Control
基金
国家"863"计划项目(No.2006AA02Z211)
江苏省自然科学基金资助项目(No.BK2006181
No.BK2007188)
江苏省环保科技项目(No.2007020)
关键词
连续流
短程硝化反硝化
生活污水
水力停留时间
continuous flow
shortcut nitrification denitrification
municipal wastewater
HRT
