SRT对剩余污泥厌氧发酵产酸的影响研究  

Effects of SRT on Acid Production during Anaerobic Digestion of Sewage Sludge

作　　者：章涛[1] 黄天寅[1] 刘锋[1] 吴玮[1] 冯延申[1] 

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215000

出　　处：《中国给水排水》2017年第5期116-119,共4页China Water & Wastewater

摘　　要：城市污泥厌氧发酵产生短链挥发性脂肪酸是实现污泥减量化、无害化和资源化的重要途径。在中温(35±1)℃条件下,不对p H值进行调控,考察了SRT在6、8、10、13 d时,剩余污泥厌氧发酵过程中SCOD、TOC及VFAs的水解溶出情况及变化规律。结果表明,SRT对污泥水解酸化具有重要影响,一定范围内延长SRT有利于污泥的水解,提高了VFAs的产量。SRT为10 d时可以获得较高的产酸量,产酸率达到0.36 g VFAs/g VS。改变SRT,VFAs的组分也随之发生变化。The production of short chain volatile fatty acid （VFAs） from domestic sewage sludge anaerobic digestion is an important way to achieve the volume reduction, harmlessness and reuse of sludge. In mesophilic digestion, without pH control, productions of SCOD, TOC and VFAs were investi- gated with sludge retention time （SRT） controlled at 6, 8, 10, and 13 days. Results showed significant effect of SRT on sludge hydrolysis and acidification. Increasing SRT within a certain range could improve the hydrolysis process and VFAs production. Maximum VFAs production was achieved with 10-d SRT, and acid production rate reached 0. 36 gVFAs/gVS. Moreover, the composition of VFAs was found to be varying with different SRTs.

关 键 词：剩余污泥 厌氧发酵 SRT 挥发性脂肪酸 

分 类 号：X703[环境科学与工程—环境工程]