摘要
为提高水稻秸秆与猪粪田间混合厌氧发酵产生物甲烷的效率,研究在中温(35±1)℃下模拟田间厌氧发酵条件活性炭对厌氧发酵产生物甲烷的影响。试验分别设置了活性炭添加量为发酵基质质量的0%、1.0%、2.0%、3.0%、6.0%、8.0%等6个处理水平,测定了各处理的生物甲烷产气量和秸秆降解的变化。结果表明,活性炭的添加能加快秸秆和猪粪混合厌氧发酵进程,缩短停滞时间,提高产甲烷峰值;活性炭的添加对秸秆和猪粪混合厌氧发酵生物甲烷的产量有显著影响。随着活性炭添加量的增加,生物甲烷的累计产量呈先增加后减少的变化,以2%和3%活性炭添加量的生物甲烷的累计产量最高,分别比对照提高了29.29%和28.04%;活性炭的加入还有利于混合厌氧发酵系统水稻秸秆纤维素和半纤维素的降解。在活性炭添加量为3%的条件下,总木质纤维素降解率达到29.57%,纤维素和半纤维素降解率分别为45.35%和34.09%,分别比对照提高了125.73%、122.00%和128.33%。表明适量活性炭的添加能加快水稻秸秆和猪粪混合厌氧发酵进程,提高厌氧发酵系统甲烷的产率和秸秆的降解率。
In order to improve the methane production efficiency of the mixed anaerobic fermentation with rice straw and pig manure in the field,this research carried out an experiment of activated carbon on methane production by simulating the field anaerobic fermentation conditions at medium temperature(35±1)℃ in the laboratory. Six treatments were used whose activated carbon content account for 0%,1%,2%,3%,6%,8% of fermentation substrate,respectively. The variation of gas production and straw degradation of each treatment was determined. The results showed that the activated carbon promoted the mixed anaerobic fermentation process by shortening lag time and increasing the peak value of methane production;the addition of activated carbon significantly influenced the biological methane production of the mixed anaerobic fermentation with straw and pig manure. The biological methane production increased firstly and then decreased with the increasing activated carbon amount,and reached the highest value at 2% and 3% treatments,increasing by 29.29% and 28.04% contrasting to the control,respectively;the addition of activated carbon also promoted the degradation of cellulose and hemicellulose of rice straw in the mixed anaerobic fermentation system. At the treatment of 3% activated carbon,the degradation rate of total lignocellulose,cellulose and hemicellulose reached 29.57%,45.35% and 34.09%,respectively,increasing by 125.73%,122.00% and 128.33% contrasting to the control. The results indicated that the addition of activated carbon can accelerate the process of mixed anaerobic fermentation with rice straw and pig manure,and increase the methane production and straw degradation in the anaerobic fermentation system.
作者
朱佳琪
陈芳清
黄永文
熊丹伟
刘杨赟
ZHU Jia-qi;CHEN Fang-qing;HUANG Yong-wen;XIONG Dan-wei;LIU Yang-yun(Hubei International Scientific and Technological Cooperation Center of Ecological Conservation and Management in Three Gorges Area,China Three Gorges University,Yichang 443002,Hubei,China;Hubei Zhengjiang Environmental Science&Technology Co.,Ltd.,Yichang 443002,Hubei,China)
出处
《湖北农业科学》
2022年第11期44-49,共6页
Hubei Agricultural Sciences
基金
湖北省科技创新专项重点项目(2016AHB014)。
关键词
混合厌氧发酵
甲烷
活性炭
秸秆降解
mixed anaerobic fermentation
methane
activated carbon
straw degradation
