Biochemical potential of methane (BMP) of camelid waste and the Andean region agricultural crops

This paper evaluates the anaerobic digestion of agricultural waste, manure and slaughterhouse residues of species typical of the Andes, such as llama, vicuna and guinea pig; quinoa, amaranth and wheat straw in order to be able to use them as a renewable energy source and boost rural development in the region. Has been used sludge from a WWTP as inoculum, evaluating the effect of two relationships between the substrate and inoculum (RSI) for both livestock and agricultural waste. The highest cumulative maximum methane production rate was obtained for the residues of flame manure and quinoa straw for an RSI of 1:2 with productions of 376.08 ml CH4/g SV and 377.02 ml CH4/g SV respectively. In these materials an RSI of 1:2 obtained increases of 22.56% and 37.54% compared to the RSI 1:1. Also, the kinetic analysis showed that the modified Gompertz model is the one that best fits performance, with constant differences of 7.06% between the experimental and predicted values. On the other hand, the modified Gompertz model was adjusted to the experimental results with an r(2) of (0.998) and an RMSE of 4.09 ml/g SV at 17.12 ml/g SV. (c) 2020 Elsevier Ltd. All rights reserved.

Automated summary

This study evaluated the anaerobic digestion of agricultural waste, manure, and slaughterhouse residues from species typical of the Andes region, such as llama, vicuna, and guinea pig; quinoa, amaranth, and wheat straw. The highest methane production rates were achieved for flame manure and quinoa straw at an RSI of 1:2, with significant increases compared to an RSI of 1:1. The modified Gompertz model proved to be the best fit for performance analysis, with a constant difference of 7.06% between experimental and predicted values.