水力负荷对微污染水自养反硝化的影响  

Influence of Hydraulic Loading on Sulfur-based Autotrophic Denitrification of Micro-polluted Water

作　　者：刘续[1] 周伟丽[2] 董晓静[2] 何圣兵[2] 李杰[1] 王亚娥[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《中国给水排水》2015年第5期45-49,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07101-007-005);浙江省近岸水域生物资源开发与保护重点实验室开放基金资助项目(J2013005)

摘　　要：为了减小生物反硝化系统的占地面积,以细高形和矮胖形两个生物滤柱为研究对象,采用硫自养反硝化技术脱除微污染水中的硝酸盐氮,研究两个反应器可达到的最短HRT和最大水力负荷。结果表明,矮胖形反应器的最短HRT为0.5 h,最大水力负荷为1.0 m3/(m2·h),且对TN和NO-3-N的平均去除率分别为83%和89%;而细高形反应器的最短HRT为10 min,最高水力负荷可达6.0 m3/(m2·h),且对TN、NO-3-N的平均去除率仍能维持在89%、94%左右。两反应器均不会出现NO-2-N的积累现象。在HRT为0.5 h的条件下,待运行稳定后,分别对两个反应器中的陶粒表面及污泥进行扫描电镜观察,发现两个反应器中的细菌均以长丝状细菌为主,且微生物主要存在于污泥中。Sulfur-based autotrophic denitrification technology was applied to treat the low concen- tration nitrate-contaminated water. In order to reduce the land area of biological denitrification system, two column reactors with the same volume, one slim and another short, were used to compare the denitri- fication performance. At last, the shortest HRT and the largest hydraulic loading were determined. The results showed that the shortest HRT and the largest hydraulic loading of the short reactor were 0.5 h and 1.0 m3/（m^2·h） , and the average removal rates of TN and NO3- -N were 83% and 89% , respectively. While the shortest HRT and the largest hydraulic loading of the slim reactor were 10 min and 6.0 m3/ （m^2·h）, and the average removal rates of TN and NO3- -N were 89% and 94%, respectively. The accumulation of nitrite was not observed in both reactors. SEM observation was made when the reactors ranstably at the HRT of 0.5 h, and it was verified that the filamentous bacteria predominated in both reactors, and bacterial population in the sludge was much higher than that on the surface of ceramsite.

关 键 词：硫自养反硝化 微污染水 HRT 水力负荷 SEM 

分 类 号：X703[环境科学与工程—环境工程]