强碱预处理和碱性强度对剩余污泥发酵的影响  

Effect of Super-alkali Pretreatment and Alkaline Intensity on the Waste Activated Sludge Fermentation

作　　者：彭永臻[1] 邢立群[1] 金宝丹[1] 王淑莹[1] 

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

出　　处：《北京工业大学学报》2016年第2期277-284,共8页Journal of Beijing University of Technology

基　　金：住建部2014年科学技术项目计划(2014-k7-022)

摘　　要：为改善污泥发酵性能,提高发酵的产酸量,在25℃条件下,研究了不同碱度(碱性(pH=10)、强碱性(pH=12)和强碱预处理(pH=12)-碱性(pH=10)对剩余污泥水解酸化的影响.结果表明:在25℃条件下,相比于碱性发酵,强碱性发酵和强碱预处理-碱性发酵均提高了SCOD、DNA、蛋白质和多糖的产量,从而为产酸菌提供了更多的产酸基质.同时发现,强碱性发酵抑制了产酸菌的活性,导致其产酸量远远低于碱性发酵,但是在强碱预处理-碱性发酵过程中,短链脂肪酸(SCFAs)和乙酸的产量均得到大幅度提高,较碱性发酵分别提高了20.00%和23.00%.显然,强碱预处理-碱性发酵更有利于剩余污泥厌氧发酵产酸.In order to improve the sludge fermentation performance and increase the short chain fatty acid(SCFAs) production,the influence of different basicity(alkaline pH=10,super-alkaline pH=12 and super-alkali pretreatment pH=12 alkaline pH=10) on WAS hydrolysis acidification was studied at25℃.The results showed that the super-alkaline fermentation and super-alkali pretreatment-alkali fermentation could improve the production of SCOD,DNA,protein and polysaccharide compared with alkaline fermentation,which provided abundant acidification substance for acidification bacteria.It also found that the activity of acidification bacteria was inhibited in the super-alkaline fermentation,which led to the lower SCFAs production than other conditions.However,the SCFAs and acetic acid were enhanced significantly in the super-alkali pretreatment alkali fermentation,which increased by 20.00%and23.00%respectively compared with the alkaline fermentation.Obviously,the super-alkali pretreatment alkali fermentation was more conducive to WAS anaerobic fermentation to producing acid.

关 键 词：剩余污泥 短链脂肪酸 厌氧发酵 碱性强度 

分 类 号：X703[环境科学与工程—环境工程]