Title: | The Management of Manure Production Units at the College of Zoo-Technology and Ecology in Chihuahua, Mexico |
Author: | Velez, S. C. Soto, C. R. |
Abstract: | Residues management environmental problematic is complex, due to the lack of environmental education and participation capacity in the community and government. The hardly livestock activities planification contribute to the excretes accumulation leading to the environment degradation and putting the public health and livestock at risk. The first objective was to propose a manure management plan at the animal production unit’s in the Facultad de Zootecnia y Ecologia. A second objective was to evaluate the biogas production from a manure mixture (pig, chicken, rabbit and cattle) produced in an anaerobic reactor and a third objective assess whether to implement a production scale biogas digester that support the provision of energy demands in production units. To accomplish the first objective a diagnostic was conducted on the recollection, disposition and use common practices of the mixture and its implications in two neighboring urban communities. In order to identify the impact an inquiry was applied in houses randomly selected within a 50, 100 and 200 m distance from the production units, Microsoft Excel and SAS 8.0 Proc Jeans XP were used to perform statistical analysis. To evaluate the mixture biogas generation rate and methane composition, an ascendant flow bioreactor was operated (UASB) with 5l capacity using mesophilic temperatures between neutral pH ranges with an organic charge (OC) of 1.9 kg SV m d . The methane content estimation CH ( ), biogas 3 1 4 g was analyzed using the gas chromatography technique. The benefit of implementing large scale digesters were evaluated based on production of CH in applying the efficiencies of total excreta estimated based on 4 the number of animals recorded and their excretion rates, calculated based on rates of consumption and digestibility of the species involved To minimize identified problems training is suggested from the standpoint . of environmental hygiene to operating personnel and implement biotechnologies to re evaluate the excreta. Production efficiencies of biogas and CH obtained were 20.5 l and 13.5 l per kg of VS respectively and 4 estimated production of 204 thousand 113 L Ch ( ) in addressing the total (105.8 t/month) of sewage 4 g generated, so the installation of a bigger digester is a viable alternative to support the energy demands of the production units. |
URI: | http://10.0.0.98/xmlui/handle/1/2045 |
Date: | 2010 |
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Observatorio Ambiental de El Colegio de Chihuahua (COLECH)
Biblioteca Virtual Ambiental del Estado de Chihuahua (BVA)
Correo electrónico: bva@colech.edu.mx