不同pH值条件下Fe^(3+)、Cu^(2+)和Zn^(2+)对厨余垃圾两相厌氧消化水解酸化过程的影响  

Effect of Fe^(3+)、Cu^(2+) and Zn^(2+) on the hydrolysis and acidification of two-phase anaerobic digesting kitchen wastes at different pH values

作　　者：李亚红[1] 王琦[1] 蔡伟民[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《环境工程学报》2007年第10期116-119,共4页Chinese Journal of Environmental Engineering

摘　　要：通过间歇实验研究了在pH=7和不调节pH两种情况下添加不同浓度的Fe3+、Cu2+和Zn2+对厌氧消化水解酸化阶段有机酸组分和含量的影响。结果表明,pH=7时,添加50 mg/L Fe3+和30 mg/L Cu2+,有利于厨余垃圾水解酸化过程的进行,反应生成的VFA(挥发性脂肪酸)含量增加。不调节pH时,添加100 mg/L以下的Fe3+和Cu2+对VFA含量也有所促进,但乳酸含量也增加。在2种pH条件下添加Zn2+对反应的促进或抑制作用均不明显。The effects of Fe^3＋ , Cu^2＋ and Zn^2＋ on the two-phase anaerobic digestion of kitchen wastes at different pH values were studied by intermittent experiments. Different concentrations of Fe^3＋ , Cu^2＋ and Zn^2＋ were added at pH = 7 and without pH adjustment to study their effects on the hydrolysis and acidification proces- ses. The results showed that, when pH = 7, the addition of 50 mg/L Fe^3 ＋ or 30 mg/L Cu^2 ＋ would promote the hydrolysis and acidification, and the yield of volatile fatty acid （VFA） was also increased. Without pH adjustment the addition of less than 100 mg/L Fe^3＋ or Cu^2＋ would improve the yield of both lactic acid and VFA. But the addition of Zn^2＋ didn＇ t affect the hydrolysis and acidification much whether pH = 7 or without pH adjustment.

关 键 词：厌氧 FE^3+ Cu^2+ ZN^2+ pH值 VFA 

分 类 号：X705[环境科学与工程—环境工程]