Production of Biogas from Bagasse: Effect of Cow Dung to Bagasse Feed Ratio, Media Solution pH and Digester’s Moisture Content on Biogas Volume and Methane Yield

Abstract

Anaerobic digestion experiments were conducted to investigate feasibility of biogas production from bagasse and cow dung. Design-Expert software was used for design of experiment and optimization process. Twelve experiments using 500 ml glass bottle s digesters were conducted at temperature of 35 o C and hydraulic time of 14 days. Biogas volume was measured daily, and composition was analyzed at the end of experiment. Digester's performance was evaluated in terms of biogas volume and methane yield produced. The objective of this work was to investigate the effect of cow dung to bagasse feed ratio, digester's moisture content and media solution pH on biogas volume and methane yield. The results showed that high media solution pH and low digester's moisture content favors high biogas and methane yield. The optimum biogas volume and methane yield were found to be 305.87ml and methane yield of 28.75 ml/gVS respectively at digester's moisture content of 80.00%, media solution pH of 8.00, 4.64 g of cow dung and 5.36 g of bagasse.

Potential of Renewable Energy in Jamaica’s Power Sector: Feasibility Analysis of Biogas Production for Electricity Generation

“…As for the methane content in biogas from bagasse, the study used the research findings from Kwaku Armah et al, 2020 [39], which established 60% as the average methane output. Likewise, Tuesorn et al [40] and Sthembiso, M., and Makarfi, I.Y., 2020 [41] have confirmed higher methane production in the co-fermentation of sugarcane bagasse with swine manure (68%) and in dairy cow manure (80%). Similarly, research by Rangkuti et al, 2006 [42], and Lansing et al, 2010 [43] have verified average methane generation of 61.7% and 69.9% in biogas generation from dairy cow dung and swine manure substrates, respectively.…”

“…where BP is the normalized biogas generation rate from the total available residue of substrates presented as 2.14 in the work of Suhartini et al [35], A r (kg kg −1 ) is the entire available residue, V r (kg d −1 ) is the ratio of volatile solids from substrates, and G r m 3 kg −1 of volatile solids represents the rate of biogas generation. The theoretical BP is calculated in [26,41] Source: derived from sources in the references of the table [20,25,26].…”