Technoeconomic analysis of biogas production using simple and effective mechanistic model calibrated with biomethanation potential experiments of water lettuce (pistia stratiotes) inoculated by buffalo dung

While many papers report biomethanation potential of various substrates subjected to treatments, very few the economic implications their work. Here, we a simple but effective mechanistic model, using Contois and Monod kinetics, considering only two classes micro-organisms (a) acidogens (b) acetomethanogens. We fitted our model CH4 CO2 evolution data from studies water lettuce (pistia stratiotes) inoculated with buffalo dung at five different ratios substrate inoculum. The was obtained by gas chromatography. has been used simulate three types biodigestors: 1-stage continuous digestor, 2-stage digestor (c) semi-batch intermittent draining digestate. exhibited no major improvement over presenting 4% increase in methane production rate 25% longer response times. best performance shown operation due tolerance high microbial loads. Biogas generated grown on farm pond approach can be monetized offsetting use market bought LPG. return investment is 24.7% 25 kg emissions are abated per ton utilized.