剩余污泥水解酸化挥发酸产量最大化试验研究  

Studies on maximizing the production of VFAs in hydrolysis and acidification process of waste activated sludge

作　　者：蔚静雯[1] 郑明霞[2] 王坤 王凯军[2] 陶涛[1] 

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074 [2]清华大学环境学院,北京100084

出　　处：《可再生能源》2012年第11期87-92,共6页Renewable Energy Resources

基　　金：国家高技术研究发展"863"计划项目(2009AA064702)

摘　　要：对剩余污泥水解酸化中挥发酸产量最大化的影响因素进行了研究。试验中投加了甲烷抑制剂氯仿来减少产甲烷反应在水解酸化过程中的干扰。试验首先研究了45℃下氯仿的不同投加量对产甲烷菌的抑制效果,旨在得到抑制产甲烷菌的最合适的氯仿投加量,并考察氯仿的投加对水解酸化效果的影响。采用上述试验得出的合适剂量的氯仿作为产甲烷抑制剂,排除产甲烷菌对挥发酸的消耗。试验重点研究了35℃和45℃下,剩余污泥水解酸化过程中挥发酸产生潜力,结果表明,在45℃时,每克VS的SCOD最大产量达到225.51 mg,挥发酸每克VS的COD最大累积量达到155.71 mg,较35℃高出21.22%,说明45℃更有利于有机物溶解和挥发酸累积,能有效促进水解酸化反应的发生。Factors of hydrolysis and acidification process to maximize the production of VFAs in waste activated sludge were studied.To inhibit the interference of methane-producing reactions in the process of hydrolysis and acidification,Chloroform was added in the test.Firstly,effect of different dosage of chloroform at 45 ℃ was investigated to find the most appropriate dosage to inhibit the reaction of methanogens and discuss the effect on the hydrolysis and acidification process as well.Then according to the above conclusions,the optimal dosage of chloroform was used as methanogenic inhibitor to exclude the consumption of VFAs.Focused on the temperature of 35 ℃ and 45 ℃,the volatile acid production potential was studied.The results showed that,at 45 ℃,the maximum value of SCOD can be achieved at 225.51 mg/gVS and the maximum accumulation of VFAs was 155.71 mgCOD/gVS,which was 21.22% higher than 35 ℃.45 ℃ is more conducive to the dissolved organic matter and volatile acids accumulated and also can effectively promote the occurrence of hydrolysis and acidification reaction.

关 键 词：剩余污泥 水解酸化 产甲烷菌 

分 类 号：X705[环境科学与工程—环境工程]