【摘要】：以農(nóng)業(yè)廢棄物稻草和豬糞為發(fā)酵原料,首次采用纖維素降解復合菌系對稻草和豬糞混合物進行生物處理,通過考察不同碳氮比(25∶1、30∶1、35∶1和40∶1)條件下稻草和豬糞混合物生物預處理的發(fā)酵特征及后續(xù)的產(chǎn)甲烷能力,探討了碳氮比對稻草和豬糞的協(xié)同生物預處理及厭氧消化效果的影響.結果表明,控制碳氮比為30∶1、料水比為11%時,稻草和豬糞混合物經(jīng)纖維素降解復合菌系于55℃預處理30 h后其厭氧消化效果最佳.在此條件下,稻草和豬糞降解液中濾紙酶活和羧甲基纖維素酶酶活分別達到了2.18和2.31 IU,其失重率高達41.69%;隨后經(jīng)厭氧發(fā)酵后其甲烷產(chǎn)率和產(chǎn)甲烷速率分別可達318.14 m L·g-1(以VS計)和10.61 m L·d-1·g-1(以VS計),且總量為9.9 g的稻草和豬糞混合物的總甲烷產(chǎn)量可達1948 m L,上述結果相對于未經(jīng)生物預處理的對照組均提高了38%.本研究結果可進一步為其它種類的農(nóng)作物秸稈和畜禽糞便的高效資源化利用提供理論支撐,展現(xiàn)出了巨大的應用潛力.
[Abstract]:The mixture of rice straw and pig dung was treated with cellulose-degrading bacteria for the first time, using rice straw and pig dung as fermentation materials. The fermentation characteristics and methanogenic capacity of the mixture of rice straw and pig manure were studied under different C / N ratios (25: 1 30: 1 35: 1 and 40:1). The effects of C / N ratio on the synergistic biological pretreatment and anaerobic digestion of rice straw and pig manure were studied. The results showed that when the ratio of carbon to nitrogen was 30: 1 and the ratio of material to water was 11, the mixture of rice straw and pig manure was pretreated at 55 鈩，

本文編號：2253223