温度对厨余垃圾两相厌氧消化中水解和酸化过程的影响  

Influence of Temperature on Hydrolysis and Acidogenesis of Kitchen Wastes in Two-Phase Anaerobic Digestion

作　　者：赵杰红[1] 张波[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：《环境科学》2006年第8期1682-1686,共5页Environmental Science

摘　　要：实验考查了厨余垃圾在4个温度(25℃、37℃、40℃、50℃)条件下的水解率、挥发酸(VFA)产量和速率、乳酸产量和有机酸的组成.结果表明:温度对水解和酸化过程均有较大影响,在小于37℃范围内水解率和酸化率均随温度升高而增加,最大的VFA浓度在37℃下获得,达34.4g/L.超过37℃,酸化率下降而水解率继续增加,最大水解率在50℃下获得达82%.VFA中以甲酸和乙酸为主,并有少量丙酸和丁酸产生,同时乳酸浓度一直较高.通过实验确定了厨余垃圾水解酸化过程的最优温度条件为37℃.The experiment evaluated the solubilization rate and VFA production rate of kitchen wastes with controlled-temperature at 25℃ , 37℃ , 40℃ and 50℃ , and subsequently investigated the lactic acid production and constituents of individual organic acids at various temperature levels. Results show that the increase of temperature when below 37℃ may improve both hydrolysis and acidogenesis rates and acidogenesis rate decreases while hydrolysis rate increases above 37℃. The maximum VFA concentration of 34.4g·L^-1 was achieved at 37℃ and a higher hydrolysis rate of 82% was obtained at 50℃. Formic and acetic acid were predominant VFA, while propionic and butyric acid took a relatively little part. And lactic acid concentration remained relatively high. Accroding to the experiment an optimum temperature to optimize both hydrolysis and acidification is 37℃.

关 键 词：厌氧 水解 酸化 温度 厨余废物 

分 类 号：X705[环境科学与工程—环境工程]