Methane emission and bioenergy potential from livestock manures in Mexico

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Inty Omar Hernandez-De Lira1, David H. Huber2, Teodoro Espinosa-Solares3 and Nagamani Balagurusamy1*

1Laboratorio de Biorremediacion, Escuela de Ciencias Biologicas, Universidad Autonoma de Coahuila, Torreon 27000, Coahuila, Mexico

2Department of Biology and Gus R. Douglass Institute, West Virginia State University, Institute, West Virginia 25112, USA

3Departamento de Ingenierıa Agroindustrial, Universidad Autonoma Chapingo, Chapingo 56230, Edo. de Mexico, Mexico

*bnagamani@uadec.edu.mx

Methane is an important greenhouse gas contributing to the global climate change leading to global warming and livestock accounts as one of the major sources of methane emission. Although, Intergovernmental Panel on Climate Change (IPCC) has developed guidelines to quantify emissions from enteric fermentation and manure management, it is recently reported that the National methane emission in US is underestimated by a factor of 1.5 – 1.7. This study estimated the emission of methane in Mexico based on the animal census data from 2012. On an average, the total livestock in Mexico produced about 344,275 t·d-1 of animal manure. Further, a manure map of different states of Mexico was developed and their potential methane emission was estimated. It is calculated that the total methane emission from enteric fermentation and manure is about 40,447.68 and 1,307.04 Gg CO2 Eq respectively. In the case of animal manures, beef and swine manures respectively contributed about 47 and 27 % of total methane emission. Based on the data obtained, the bioenergy potential of Mexico by way of manure treatment using anaerobic digestion was calculated and is approximately 5,910.35 TJ, which can generate 410.41 GWh of electricity and reduce emissions of methane by 2,240.64 Gg CO2Eq. The data clearly suggests that anaerobic digestion is a sustainable technology, not only for generation of renewable bioenergy, but also for significant reduction in methane emission from animal manures.

Mexico-Livestock-Methane emissions


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