Study on Biogas Production by Anaerobic Fermentation of Fungi Residue

Yao Li; Yuan Changbo; Wang Yanqin; Cao Debin; Bian Wenfan; Yang Guang

doi:10.3969/j.issn.1001-4942.2014.02.019

Abstract：With vinasse fungi residue as the raw material , the batch fermentation experiments were car-ried out using fermentation device in laboratory .The methane production potential and influencing factors of fungi residue anaerobic fermentation were discussed , and the application experiments were carried out in rural household biogas digesters .The results showed that the fungi residue after proper treatment could achieve effi-cient fermentation to produce biogas;the raw material biogas rate could be up to 0.133 m3/kg of dry matter, and the biogas production potential was about half of that of straw .Using fungi residue to produce biogas had the advantages of simple pretreatment method and rapid start .The optimal parameters of using fungi residue to produce biogas were as follows .The raw fungi residue was mixed with cow dung at the ratio of 7∶3 ( dry weight) to produce the fermented material;the fermented material, biogas slurry and water were mixed at the ratio of 5∶3∶2 by weight;after pile of retting pretreatment for 3 ~5 days, and adding 10%of chicken manure biogas slurry , the fermentation started .Using fungi residue for household fermentation to produce biogas was feasible, which could meet the daily needs of household in the seasons with higher temperature ; the fed -batch manner should be adopted during the household application .