摘要
为提高人粪无害化资源化利用效果,本研究以人粪为厌氧发酵原料,以猪粪发酵沼液为接种物,对玉米秸秆、小麦秸秆、水稻秸秆生物炭分别在5％、10％、20％的添加比例时对厌氧发酵产甲烷含量、累积产气量等指标的影响进行研究.结果表明:在35 ℃恒温条件下厌氧发酵40 d,各处理组累积产气量最高依次为添加10％水稻秸秆生物炭(C2)组,添加10％小麦秸秆生物炭(B2)组以及添加20％玉米秸秆生物炭(A3)组,分别为6 346 mL、5 044 mL、4 621 mL;对照组以及处理组的粪大肠杆菌灭活率和蛔虫卵死亡率的结果均大于99％,达到了无害化处理的目的;在处理组的厌氧发酵体系中检测到对产气效果具有明显积极影响的优势菌群Proteobacteria和Synergistetes,表明生物炭对人粪厌氧发酵产沼气具有积极作用.
Abstract
In order to enhance the harmless and resourceful utilization of human feces,this study utilized human fe-ces as anaerobic fermentation substrate and pig manure fermentation liquid as inoculum.The effects of biochar de-rived from maize straw,wheat straw,and rice straw,added at proportions of 5％,10％and 20％,were investigated on methane content and cumulative gas production during anaerobic fermentation.The results indicated that under con-stant temperature conditions of 35 ℃ for a fermentation period of 40 days,the highest cumulative gas production was observed in the group with 10％rice straw biochar(C2),followed by the group with 10％wheat straw biochar(B2),and the group with 20％maize straw biochar(A3),with respective values of 6346,5044,4621 mL,respectivly.Both the control and treatment groups exhibited over 99％inactivation of fecal Escherichia coli and mortality of helminth eggs,achieving the objective of harmless treatment.In the anaerobic fermentation system of the biochar-treated groups,advantageous bacterial phyla,Proteobacteria and Synergistetes were detected,indicating a positive impact of biochar on anaerobic methane production from human feces.
NETL
NSTL
万方数据