环境工程学报2018，Vol.12Issue(2)：645-653,9.DOI:10.12030/j.cjee.201707187
蔬菜类废弃物甲烷发酵的产气潜能及过程特征
Biogas production potential and process character of methane fermentation of vegetable waste
摘要
Abstract
Vegetable wastes are the promising source for methane fermentation.The aim of this present study to examine the biogas production by using five common vegetable wastes by batch test.Furthermore,the rate-limiting step and the characteristics of substance transform during methane fermentation were further analyzed.Results revealed that the cumulative methane production of five vegetable wastes evidently increased rapidly within 10 days.However,the highest methane production was obtained by potato and Chinese cabbage wastes,which were 102 mL · g-1(VS) and 83 mL · g-1(VS),respectively.On the other hand,the lowest methane production was received by cucumber waste down to 35 mL · g-1(VS).Consequently,kinetics analysis exposed that the rates of hydrolysis,acidification,acetification and methanation of potato and Chinese cabbage were higher than other vegetable wastes,the maximum conversion potential of them in each stage of methane fermentation was twice as much as others.The results of the staged character analysis on the rate-limiting step showed that the SCOD from rapid hydrolysis of Chinese cabbage was not highly effective to convert in VFAs during fermentation stages,but the conversion of the accumulative VFAs to acetic acid was the rate-limiting step of carrot,potato and cucumber.Moreover,eggplant considerably enhanced the accumulation of SCOD and VFA at the same time were characterized.In addition,the result of the matter transformation characteristics analysis during methane fermentation indicated that propionic accumulation which was evidently observed after 4 days in each waste due to the descent of the conversion rate of acitic acid to methane,after 10 days,the accumulated propionate content which was gradually degraded because of the reduction in acidogenesis process.关键词
蔬菜类废弃物/甲烷发酵/产气潜能/限速步骤/物质转化Key words
vegetable waste/methane fermentation/biogas production potential/rate-limiting step/substrate transformation分类
资源环境引用本文复制引用
宋亚楠,宋梓梅,裴梦富,贾雪雪,强虹..蔬菜类废弃物甲烷发酵的产气潜能及过程特征[J].环境工程学报,2018,12(2):645-653,9.基金项目
国家自然科学基金资助项目(51308460) （51308460）
