摘要
餐厨垃圾三相分离后的固态残渣碳氮比较低,通过添加水稻秸秆调节其碳氮比后开展干式厌氧消化序批实验,考察其产气规律。结果显示:在65 d的发酵周期内,纯餐厨废渣的干式厌氧消化产气潜力为389.5 mL·g^(-1)VS,按5∶1的比例加入水稻秸秆的产气潜力可以达到409.9 mL·g^(-1)VS,二者混合发酵产气率较单一原料增加27.3%;发酵过程中氨氮积累至4000 mg·L^(-1),Methanosarcina是餐厨废渣厌氧消化过程中的优势产甲烷古菌,其相对丰度高达91.7%。
The C/N of solid residue after three-phase separation of food waste is relatively low.In this study,batch experiment of dry anaerobic digestion was carried out to investigate the law of biogas production by adding rice straw to adjust C/N.The results showed that in the 65 days,the biogas production potential of dry anaerobic digestion of pure food waste residues was 389.5 mL·g^(-1)VS,and the biogas production potential of adding rice straw in the ratio of 5∶1 could be 409.9 mL·g^(-1)VS,increased by 27.3%;Affected by high ammonia nitrogen content 4000 mg·L^(-1),Methanosarcina is the dominant methanogenic in the anaerobic digestion of food waste residues,and its abundance accounts for more than 91.7%.
作者
李强
邓雅月
马诗淳
尹小波
邓宇
LI Qiang;DENG Ya-yue;MA Shi-chun;YIN Xiao-bo;DENG Yu(Biogas Institute of Ministry of Agriculture and Rural Affairs,Chengdu 610041,China;Key Laboratory of Development and Application of Rural Renewable Energy,Ministry of Agriculture and Rural Affairs,Chengdu 610041,China)
出处
《中国沼气》
2022年第2期11-17,共7页
China Biogas
基金
四川省科技计划资助(2020YFS0288)
中国农业科学院科技创新工程(CAAS-ASTIP-2016-BIOMA)。
关键词
餐厨垃圾
三相分离
固态残渣
干式厌氧消化
水稻秸秆
food waste
three-phase separated
solid residues
dry anaerobic digestion
rice straw