粪草比对干式厌氧发酵产沼气效果的影响  

Effect of ratios of manure to crop on dry anaerobic digestion for biogas production

作　　者：刘战广[1,2] 朱洪光[1] 王彪 张亚雷[1,3] 

机构地区：[1]同济大学生物质能源研究中心,上海200092 [2]同济大学环境科学与工程学院,上海200092 [3]上海林海生态技术有限公司,上海200092

出　　处：《农业工程学报》2009年第4期196-200,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：上海市科委项目"多种农业有机废弃物沼气发酵集中供气技术的研究与示范"(07DZ12050);国家科技支撑计划项目"东部经济发达地区沼液好氧处理型沼气工程示范"(2008BADC4B05)

摘　　要：弄清粪草比对干式厌氧发酵产气效果的影响,对改进干式厌氧工程具有重要意义。该文按A、B、C、D设计了4组试验:A组为单独猪粪,B组为单独稻草,C组为猪粪与稻草质量比2︰1,D组为猪粪与稻草质量比1︰2。试验进行了62d,反应温度设定为(35±1)℃,各组反应的TS(总固体)浓度均为30%。结果显示,产气曲线出现拐点的时间A组在第48d,B组在第40d,C组在第26d,D组在第25d。C、D两组总产气量分别为15715mL和13186mL。而根据A、B两组单独原料产气量推算,C、D两组的产气潜力分别为15168mL和13838mL。实际测量值与计算值没有显著差别。调节粪草比可以从原料转化速率方面促进发酵效率,并不能提高原料的产气潜力。因此,粪草比改善的优势可能是改良原料结构和调节原料营养,而不是改善发酵原料的转化潜力。To make clear the impact of ratios of manure to crop on dry anaerobic digestion would be of great significance to promote the practical progress of dry anaerobic digestion project. Four experiments were set at total solids（TS） of concentration of 30%： （A） pig manure alone; （B） straw alone; （C） the mass ratio of pig manure to straw of 2：1; （D） the mass ratio of pig manure to straw of 1：2. The experimental temperature was controlled at （35±1） ℃. Over 62 days, operation period, the results showed that the biogas production to time curves of experiment （A）, （B）, （C） and （D） reached the inflection point at 48th, 40th, 26th and 25th days’ respectively. The total biogas yields of experimental （C） and （D） were 15715 and 13186 mL, respectively. According to the biogas yields of experiment （A） and （B） with the materials separately, it could be calculated that the biogas production potentials of （C） and （D） were 15168 and 13838 mL, respectively. There was no significant difference between the experimental results and the calculated values. The improvement of ratio of manure to crop could promote digestion efficiency by improving the digestion speed. But no obvious effect was found on enhancing the biogas production potential. Thus, the advantages of dry anaerobic co-digestion may be of improvement to material structure and of adjustment to material nutrient, but not of enhancement of the biogas production potential.

关 键 词：沼气 农业废弃物 猪粪 干式厌氧发酵 粪草比 发酵效率 产气潜力 

分 类 号：S216.4[农业科学—农业机械化工程]