牛粪和餐厨垃圾混合两相发酵产氢产甲烷的协同作用研究  

Study of the synergistic effects on the two-stage hydrogen and methane production by co-digestion of cattle manure and food waste

作　　者：刘新媛 黄耀坤 吴楠 彭锦星 靳登超 Liu Xinyuan;Huang Yaokun;Wu Nan;Peng Jinxing;Jin Dengchao(College of Engineering and Technology,Tianjin Agricultural University,Tianjin 300392,China;China Northwest Architecture Design And Research Institute Co.Ltd.,Xi’an 710018,China)

机构地区：[1]天津农学院工程技术学院,天津300392 [2]中国建筑西北设计研究院有限公司,陕西西安710018

出　　处：《可再生能源》2023年第8期995-1000,共6页Renewable Energy Resources

基　　金：国家重点研发计划子课题(2018YFD1100503);天津市教委科研计划项目(2022KJ021)。

摘　　要：通过两相厌氧发酵批式实验,研究牛粪和餐厨垃圾在不同混合比例下(4∶0,3∶1,2∶2,1∶3和0∶4)的产氢、产甲烷和产能特性,探究混合基质发酵在两相厌氧发酵产能过程中的协同作用。研究结果表明:氢气产率、甲烷产率和能量产率均随着餐厨垃圾占比的提高而增大,混合发酵在缩短产气延迟时间和提高最大产氢产甲烷速率方面具有积极作用;氢气产率和丁酸产量呈显著正相关关系,说明混合发酵和餐厨垃圾产氢均遵循丁酸型代谢途径;牛粪单独发酵时的主要挥发性脂肪酸产物为乙酸,氢气产率很低;混合发酵产氢在牛粪和餐厨垃圾之比为1∶3时表现出协同作用,而在牛粪和餐厨垃圾之比为3∶1和2∶2时表现出拮抗作用;在产甲烷和产能方面混合发酵呈现协同作用,且协同率随牛粪占比的增加而提高;当牛粪和餐厨垃圾之比为3∶1时,产甲烷协同率和产能协同率分别为23.6%和20.4%,协同效果最显著。Two-stage anaerobic digestion experiment was conducted to investigate the features of the hydrogen,methane and energy production from co-digestion of cattle manure and food waste at the mixing ratios of 4∶0,3∶1,2∶2,1∶3 and 0∶4,and also the synergistic effects of co-substrate fermentation.Results showed that the hydrogen yield,methane yield and energy yield increased with food waste proportion,the co-digestion had positive effects on reducing lag times for hydrogen and methane production,and also increased the maximum hydrogen and methane production rates.Statistical analysis showed a significant positive relationship between the hydrogen yield and the n-butyrate content,indicating the hydrogen production by food waste or co-substrate fermentation followed the butyrate-pathway.However,the main volatile fatty acid detected was acetate for cattle manure fermentation in the first stage and the hydrogen yield was low.The synergistic effect for hydrogen production was acquired at the cattle manure and food waste ratio of 1∶3,but the antagonistic effects were found at the ratios of 3∶1 and 2∶2.All the mixing ratios obtained synergistic effects for methane and energy production,and the synergistic rates increased with cattle manure proportions.The most significant synergistic effect was achieved at the ratio of 3∶1 with the synergistic rate of 23.6%for methane production and 20.4%for energy production.

关 键 词：餐厨垃圾 牛粪 厌氧发酵 产氢产甲烷 协同作用 

分 类 号：TK6[动力工程及工程热物理—生物能]