环境工程学报2017，Vol.11Issue(5)：2646-2653,8.DOI:10.12030/j.cjee.201603253
酸化冲击对低pH厌氧发酵系统性能的影响
Effect of acidification shock on performance of anaerobic fermentation system at low pH
摘要
Abstract
The objective of this experiment is to investigate the effect of acidification shock on the performance of anaerobic fermentation systems for energy recovery from organic wastewater.Variations in detection parameters were systematically analyzed in an anaerobic internal circulation reactor (AICR) fed with synthetic molasses wastewater.Influent volume loading was increased step by step to simulate the emergence of acidification shock on a high-volume loading.After acidification shock was applied,high-throughput sequencing technology was used to analyze the structure of the microbial community.The results showed that acidification shock had a fatal effect on the system.Acidification caused reductions in total biogas production rate and COD removal rate,disintegrated the granular sludge,transformed the fermentation type,and completely inhibited methanogens.With the imple mentation of the acidification shock,butyric-type fermentation was transformed into mixed-acid fermentation,which has a lower hydrogen-producing capacity than that of butyric-type fermentation.Total biogas production rate was reduced by about 50％ (from 2 100 mmol · (L · d)-1 to 1 056 mmol · (L · d)-1) under the circum stances of no change in influent volume loading.The result of the microbial community analysis showed that the percentage of non-hydrogen producing bacteria was 54.7％,whereas the percentage of hydrogen producing bacteria was only 37.7％ in the system,and methane-producing bacteria were not detected after acidification.关键词
酸化/低pH/厌氧发酵/冲击/颗粒污泥Key words
acidification/low pH/anaerobic fermentation/shock/granular sludge分类
资源环境引用本文复制引用
张松,刘敏,陈滢..酸化冲击对低pH厌氧发酵系统性能的影响[J].环境工程学报,2017,11(5):2646-2653,8.基金项目
国家自然科学基金资助项目(51108285) （51108285）
