电子受体对富磷污泥重力浓缩过程中释磷的影响  

Effect of Electron Acceptor on Anaerobic Phosphorus Release during Gravity Thickening of Phosphorus-rich Excess Sludge

作　　者：王莉[1,2] 杨永哲[1] 李林辉[1] 高榕 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安市环境保护科学研究院,陕西西安710002

出　　处：《中国给水排水》2010年第19期24-27,共4页China Water & Wastewater

基　　金：教育部留学回国人员科研项目(教外司留[2009]1001);陕西省高校省级重点实验室重点科研项目(09JS028)

摘　　要：利用富磷剩余污泥进行重力浓缩试验,分别以硝酸盐、亚硝酸盐、溶解氧作为电子受体,考察不同浓度的电子受体对厌氧浓缩过程中磷释放的影响。结果表明:当有硝酸盐存在时,剩余污泥几乎不释磷,当硝酸盐浓度达到60 mg/L时,对释磷具有明显的抑制作用;低浓度的亚硝酸盐对磷的释放也有一定的抑制作用,但是当亚硝酸盐浓度>35 mg/L时,反而会促进磷酸盐的释放;控制曝气时间以保证一定的溶解氧量,随着曝气时间的延长,硝酸盐浓度不断增加,浓缩时污泥起始释磷时间推后,当曝气时间达到24 h时,对污泥释磷具有明显的抑制作用。Phosphorus-rich excess sludge was used to perform gravity thickening test, and the effect of different concentrations of electron acceptors on anaerobic phosphorus release during gravity thickening of phosphorus-rich excess sludge was investigated using nitrate, nitrite and DO as electron ac- eeptors. The results show that the excess sludge does not release phosphorus in the presence of nitrate, and the inhibition effect is obviously when the nitrate concentration is 60 mg/L. The low concentration of nitrite inhibits phosphorus release to a certain extent, however, when the nitrite concentration is higher than 35 mg/L, the phosphorus release is promoted. The aeration time is controlled to guarantee a certain amount of dissolved oxygen, as the aeration time is increased, nitrate concentration is increased and the phosphorus release time delays during gravity thickening. There is a significant inhibitory effect on the phosphorus release when the aeration time is more than 24 h.

关 键 词：富磷剩余污泥 重力浓缩 厌氧释磷 电子受体 硝酸盐 亚硝酸盐 

分 类 号：X703[环境科学与工程—环境工程]