曝气量对剩余污泥中有机质溶出的影响  

Effect of aeration quantity on dissolved organic matter release from excess sludge

作　　者：段小睿[1] 

机构地区：[1]天津创业环保集团股份有限公司东郊污水处理厂,天津300381

出　　处：《工业用水与废水》2011年第1期86-89,共4页Industrial Water & Wastewater

基　　金：天津市自然科学基金项目(08JCYBJC13200);天津市高等学校科技发展基金计划项目(20060521)

摘　　要：剩余污泥中富含有机质、磷等物质,将其大量溶出有利于后续的资源回收利用。厌氧和好氧条件对污泥中有机质的溶出影响较大。调整不同的曝气量,对剩余污泥中SCODCr、VFAs、磷等的溶出进行对比研究。结果表明,ρ(DO)<1 mg/L,明显利于VFAs的生成;较高的曝气量(ρ(DO)=7 mg/L)也利于SCODCr的生成,但是由于存在好氧微生物对SCODCr的利用,且产物多为CO2等,所以SCODCr值低于低曝气量条件;ρ(DO)<2 mg/L,明显利于磷的释放,厌氧条件下14 d的释磷量为54.8 mg/L左右;曝气量越大越利于剩余污泥中NO3--N的生成。As excess sludge contains high concentration of organic matters,phosphorus and so on,to release the said matters largely from it is benefit for the following resources recycling and utilization.The influence of anaerobic and aerobic conditions on the release of organic matters in sludge was significant.The release of SCODCr,VFAs,phosphorus and some other matters from the excess sludge were comparatively studied through adjusting aeration quantity.The results showed that,when ρ（DO） 1 mg/L,VFAs formed largely;higher quantity of dissolved oxygen（ρ（DO） = 7 mg/L） was also conducive to SCODCr formation.However,for the existence of the phenomena that aerobic microorganisms used SCODCr to produce CO2 and so on,SCODCr production quantity with high aeration quantity was less than that with low aeration quantity;The DO with concentration below 2 mg/L was significantly beneficial to the phosphorus release,and the release amount was about 54.8 mg/L after 14 d of reaction under anaerobic condition;the formation quantity of NO3——N increased with the increasing of aeration quantity.

关 键 词：剩余污泥 曝气量 有机质 

分 类 号：X703.1[环境科学与工程—环境工程]