不同剩余污泥发酵液对NOx-还原的影响  

Effect of different waste activated sludge fermentation supernatants on NO_x^- reduction process

作　　者：何岳兰 王淑莹[1] 李夕耀[1] 马斌[1] 郭思宇[1] 

机构地区：[1]北京工业大学,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《中国环境科学》2016年第10期2964-2971,共8页China Environmental Science

基　　金：住建部2014年科学技术项目计划(2014-k7-022);北京工业大学第13届研究生科技基金项目(ykj-2014-10898)

摘　　要：在(35±1)℃,且pH值分别为酸性(pH=4.0,5.0,6.0)和碱性(pH=8.0,9.0,10.0)条件下进行剩余污泥厌氧发酵,批次试验研究了相同体积的不同污泥发酵液对NO_x^-还原过程的影响.结果表明:当pH=8.0产生的发酵液做碳源时反应速率最高,NO_3^-和NO_2^-的比还原速率分别为16.28mg/(g VSS·h)和17.51mg/(g VSS·h).酸性条件产生的发酵液做碳源时NO_2^-还原过程较NO_3^-还原过程快;而碱性条件产生的发酵液做碳源时NO_3^-还原速率高,且产生了反硝化过程中亚硝酸盐积累现象,其中pH=10.0产生的发酵液做碳源时反硝化过程亚硝积累率高达82.5%.This research adopted the（35±1）℃ temperature and pH were acidity（pH=4.0, 5.0, 6.0） and alkaline（pH=8.0, 9.0, 10.0） conditions to conduct waste activated sludge anaerobic fermentation, using an equal volume of different fermentation liquid as carbon source researched its effect on NO_x- reduction process.The results showed that： when the fermentation liquid produced in pH=8.0 condition as carbon source, the highest reaction rate appeared, NO_3- and NO_2-reduction rate respectively were 16.28mg/（g VSS·h） and 17.51mg/（g VSS·h）. The NO_2- reduction process was faster than the NO_3- reduction process while the fermentation liquid as carbon source produced by acidic condition, but the NO_3-reduction rate was higher when the fermentation liquid as carbon source produced by alkaline condition. Meanwhile, which produced the nitrite accumulation phenomenon among the denitrification process, the accumulation rate of nitrite during denitrification process reached 82.5% when the fermentation liquid as carbon source produced in pH=10.0condition.

关 键 词：污泥发酵液 反硝化 碳源 碳氮比 

分 类 号：X703.1[环境科学与工程—环境工程]