海水盐度对A/O生物系统处理效果的影响  

Influence of Seawater Salinity on Processing Effect of A/O Biology System

作　　者：于德爽[1] 冷栋栋[1] 吴祥芬[1] 

机构地区：[1]青岛大学化学化工与环境学院,青岛266071

出　　处：《青岛理工大学学报》2009年第3期94-99,共6页Journal of Qingdao University of Technology

基　　金：国家自然科学基金(50678085)

摘　　要：试验采用A/O工艺,在进水COD为500-600 mg/L,NH3-N为80-90 mg/L,pH7.0-8.0,溶解氧为2-3 mg/L,温度为18-25℃的条件下,分别研究了不同海水盐度（10%,30%,50%,70%海水比例）对有机物及NH3-N去除效果的影响,对系统短程硝化的影响,以及对活性污泥结构与沉降性能的影响.结果表明：海水盐度在30%范围内,经驯化稳定后,系统对COD和NH3-N的去除率均可达到90%左右,NH3-N去除率受盐度影响程度相对更小;控制海水盐度在30%以上,系统可实现短程硝化;海水盐度为50%时,亚硝化率可达到97%,且较为稳定;随海水盐度的增加,污泥絮凝体由开放、疏松变得封闭、紧密,SVI不断下降.The experiment has been initiated to study the influence of different seawater salinities （10%, 30%, 50%, 70% seawater proportion） on the removal efficiency of COD and NH3-,N, the shortcut nitrification-denitrification of the system, the activated sludge configuration and the settling characteristics by A/O process, under the conditions of the influent COD 500-600 mg/L, NH3-N 80-90 mg/L, pH7. 0-8.0, DO 2-3 mg/L and the temperature 18-25 ℃. The result of the experiment indicates that the removal efficiency of COD and NH3-N is about 90% after being domesticated in the 30% seawater salinity and the seawater salinity has less influence on the removal efficiency of NH3-N than that of COD. The system could achieve the shortcut nitrification-denitrification by controlling the seawater salinity above 30%, and the nitrosation rate could be steadied at 97% in 50% seawater salinity. The sludge flocculation is changing from open and loose into close and compact with the increase of seawater salinity, and the SVI is dropping unceasingly.

关 键 词：海水盐度 COD去除率 NH3-N去除率 短程硝化 活性污泥结构 

分 类 号：X703.1[环境科学与工程—环境工程]