Anaerobic Co-digestion of Fresh Maize Leaves with Elephant Grass

Journal of Applied Sciences and Environmental Management

Oleghe, P.O.¹  Efosa, J.O.¹  Olugbemide, A.D.¹  Imsuen, A.O.¹ 

关键词: co-digestion;    maize leaves;    elephant grass;    biogas;    synergistic effect;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

Anaerobic co-digestion of maize leaves (ML) with Elephant grass (EG) was studied ina single phase digester at ambient temperature (29±3°C). Special attention was paid to synergistic andantagonistic effect of co-digestion of the substrates on biogas production in order to establish the bestblend. Six different treatments were set up based on mixture proportions in digesters labelled A-E.Digester A contained 100% maize leaves (100% ML), which served as control. The compositions ofother digesters were as follows: Digester B contained 90% ML and 10% EG, C 80% ML, 20% EG, D70% ML, 30% EG, and E 60% ML, 40% EG. The initial pH of the digesters varied from 3.94-4.12 whilethe final pH ranged from 3.01-10.49. 100% ML produced 520ml of biogas at the end of 20 days of theexperiment. Digesters B and E had synergistic effects on biogas production with total volume of 870mland 610ml respectively. However, Digesters C and D had negative effects on biogas yield producing460ml and 400ml. Percentage decreases of the two digesters were 11.5% and 23.1% respectively. DigesterE showed 67.3% higher biogas production compared to digestion of maize leaves alone.

【 授权许可】

Unknown