Influencia del pH sobre la digestión anaerobia de biorresiduos de origen municipal

Municipal bio-wastes-MBW are characterized by their high content of organic matter, humidity, nutrients, and additionally are wastes easily acids, which makes them a source of pollution when are improperly disposed. Anaerobic digestion-AD is a technological alternative for MBW pollution control as well as for methane production as a renewable energy source; however, parameters such as pH can affect the process. This study evaluated at laboratory scale thought Biochemical Potential Methane-BPM assays at a temperature of 30oC during 40 days, the influence of pH on the MBW-AD. The pH values tested ranged from 5.5 to 8.0 units, using as inoculum sludge coming from the sludge anaerobic digestion of a domestic wastewater treatment plant. It was noticed that the acid pH between 5.5 and 6.0 units had the lowest methane production, 70.0 and 71.0mLCH4*gVS-1 respectively; while pH values near to the neutrality achieved the best results, being the highest production of methane corresponding to a pH of 7.0 units, reaching a value of 126.0mLCH4*gVS-1. Similarly, it was found that pH values from 7.0 to 8.0 units had the best buffer capacity, ensuring stability of the anaerobic process and avoiding inhibition phenomena. To achieve this condition, it is necessary to apply pH adjust due to the acid characteristics of the MBW.

• Autores: Parra Orobio, Brayan Alexis; Torres Lozada, Patricia; Marmolejo Rebellón, Luis Fernando; Cárdenas Cleves, Lina Marcela; Vásquez Franco, Carlos; Torres López, Wilmar Alexander; Ordóñez Andrade, José Abdón
• Tipo de recurso: Article of journal
• Fecha de publicación: 2014
• Institución: Universidad de Ciencias Aplicadas y Ambientales U.D.C.A
• Repositorio: Repositorio Institucional UDCA
• Idioma: spa
• OAI Identifier: oai:repository.udca.edu.co:11158/2213
• Acceso en línea: https://revistas.udca.edu.co/index.php/ruadc/article/view/421; https://doi.org/10.31910/rudca.v17.n2.2014.421
• Palabra clave: Biodegradabilidad anaerobia; Capacidad buffer; Potencial bioquímico de metano; Residuos sólidos; Materia orgánica; Nutrientes; Humedad; Residuos
• Rights: openAccess
• License: Derechos Reservados - Universidad de Ciencias Aplicadas y Ambientales