Experimental Investigation of Optimal Methanization Conditions for Cotton Residues: Case Study

For optimum methanization of cotton residues, four (4) samples were made up in vases, with cotton residues as the main component.The first sample consisted of 30g of cotton residue and 270 ml of inoculum, the second of 30g of cotton residue, 270 ml of inoculum and 0.1g of sodium, the third of 15 g of cotton residue, 270 ml of inoculum and 15g of cow dung, and the fourth of 15g of cotton residue, 270 ml of inoculum, 15g of cow dung and 0.1g of sodium.It took 75 days to digest the 30 g of organic matter contained in each sample.The results of this study showed that the sample 4, made up of cotton residue, inoculum, cow dung and sodium, gave the highest biogas volume (1.068 m3), methane volume (0.66 m3) and methane content in the biogas (89%).The best conditions for optimal biogas production from cotton residues are those of a combination of cotton residues, inoculum, cow dung and sodium ash.The results of this study provide knowledge for choosing the optimum conditions for the methanization of organic matter from agricultural waste.