三种主要农村废弃物混合产沼气试验研究

Anaerobic Co-digestion of Three Major Rural Wastes for Biogas Production

随着我国农村经济的发展,农村废弃物越来越多,利用其生产沼气,不仅可以为人们提供清洁能源,还能大力改善农村生活环境。本研究选取农村三种主要废弃物(玉米秸秆、有机生活垃圾和牛粪)按照不同的质量比(1∶0∶0、1∶2∶0、1∶1.5∶0.5、1∶1∶1、1∶0.5∶1.5、1∶0∶2)混合进行产沼气试验。结果表明,相比单物料和双物料,三物料混合厌氧发酵能显著提高产气率和减少发酵周期。玉米秸秆、有机生活垃圾和牛粪产沼气性能最佳的配比为1∶0.5∶1.5。

Rural wastes have increased with the development of rural economy in China. Biogas technology can not only provide clean energy,but also improve the rural living environment. In this study,three major rural wastes( maize straw,domestic organic garbage and cow manure) were anaerobically co-digested at different ratios( 1∶ 0∶ 0,1∶ 2∶ 0,1∶ 1. 5∶ 0. 5,1∶ 1∶ 1,1∶ 0. 5∶ 1. 5 and 1∶ 0∶ 2,by wet weight ratio). The results revealed that ternary mixing of feedstocks significantly increased the biogas yield and reduced the digestion time compared with binary mixing of feedstocks and single feedstock. The optimal mixing ratio of the three feedstocks was 1∶ 0. 5∶ 1. 5 for anaerobic co-digestion.