摘要
为提高菇渣的利用效率,以菇渣为发酵原料,在35℃下,进行初始干物质浓度为6%、8%、10%和12%的厌氧发酵,考察了初始干物质浓度对产甲烷性能及有机质降解的影响。结果表明:初始干物质浓度在10%时发酵效果最佳,此时累计产甲烷量、VS产气率和VS产甲烷率分别为4 034.71 m L、235.15 m L·g^(-1)和134 m L·g^(-1),VS降解率为43.19%;菇渣的沼气产率与VS降解率成正比;淀粉、脂肪和蛋白质的降解率分别为99.01%、70.78%和17.16%;总纤维素的降解率为30.37%,以半纤维素降解为主。实验结果说明,菇渣具有较高的产气性能;产生的沼气主要来源于微生物对碳水化合物的降解。
In order to improve the application of mushroom residue for biogas production,it was digested anaerobically at 35 ℃ at 6%,8%,10%,and 12% of total solid substrate concentration,respectively. The effect of initial dry matter concentration on biogas yield and organic matter degradation was investigated. Our results indicate that the yield of cumulative methane（ 4 034. 71 m L）,the rate of gas production per volatile solid（ 235. 15 m L·g-1）,the rate of methane production per volatile solid（ 134 m L·g-1）,and the degradation rate of mushroom residue（ 43. 19%） were highest at an initial dry matter concentration of 10%. Furthermore,the production of biogas using mushroom residue as substrate was proportional to the degradation rate of the substrates used. The degradation rate of starch,fat,and protein were 99. 01%,70. 78% and 17. 16%,respectively. The lignocellulose degradation rate was 30. 37%,mainly from hemicellulose. These results illustrate that mushroom residue has a great potential for biogas production via microbial carbohydrate degradation.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第7期3819-3824,共6页
Chinese Journal of Environmental Engineering
基金
黑龙江省自然科学基金资助项目(QC2011C083)
关键词
菇渣
厌氧发酵
有机质
初始干物质浓度
甲烷
mushroom residue
anaerobic fermentation
organic substance
initial dry matter concentration
methane
