文档介绍：第 34 卷第 4 期
期
Environmental Science & Technology
Vol. 34
Apr. 2011
李定龙,戴肖云,赵宋敏, 对厨余垃圾厌氧发酵产酸的影响[J]. 环境科学与技术,2011,34(4):125--long,DaiXiao-yun,ZhaoSong-min,
[J].EnvironmentalScience&Technology,2011,34(4):125-128.
pH对厨余垃圾厌氧发酵产酸的影响
李定龙, 戴肖云, 赵宋敏, 刘东飞, 祁静
(常州大学环境与安全工程学院,江苏常州 213164)
摘
要:在接种比例为 4∶1,温度为 37℃的条件下,采用污泥加热灭菌的方法,研究初始 pH 对厨余垃圾厌氧发酵产酸的影响。结果
表明,发酵产物的组成与 pH 有关,乙酸在不同的 pH 条件下总为主要产物;当 pH=7 时,乙酸和 VFA 产量在第 5 天达到最大值 g/L
和 g/L,气体组分中 CO2 是主要成分,COD 去除率达到 %, 发酵液中 pH 并没有发生较大的波动,其变化幅度基本集中在 ~
之间。通过实验确定了厨余垃圾厌氧发酵产酸的最佳初始 pH 为 7。
关键词:厨余垃圾; 厌氧发酵; 挥发性脂肪酸; pH
中图分类号:X705
文献标志码:A
doi:.1003-
文章编号:1003-6504(2011)04-0125-04
Influence of pH on Acidity during Anaerobic Fermentation of
Kitchen Waste
LI Ding-long, DAI Xiao-yun, ZHAO Song-min, LIU Dong-fei, QI Jing
(School of Environmental and Safety Engineering, ChangZhou University, ChangZhou 213164, China)
Abstract:Under the conditions of inoculation ratio of 4 ∶1 and temperature 37℃, using method of sludge heat steriliZa-
tion, the influence of pH on acidity during anaerobic fermentation of kitchen waste was studied. Results indicated that the
composition of fermentation product was related to pH and acetic acid was always the main product in different conditions.
When pH was 7, th