Performance evaluation of an intermittent flow continuous mix anaerobic reactor operating on dairy manure

• Autores: A. E. Ghaly, E. A. Echiegu
• Localización: Biomass and bioenergy, ISSN 0961-9534, Vol. 4, Nº 3, 1993, pág. 185
• Idioma: inglés
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• Resumen

  • A pilot scale Intermittent Flow Continuous Mix Reactor (IFCMR) of 251 capacity was used to study the effects of operating temperature (25 and 35°C), influent solid content (3.3 and 6.6%) and hydraulic retention time (5, 10, 15, 20 and 25 days) on the biogas yield and pollution potential reduction of dairy manure. The results indicated that the intermittently fed anaerobic reactors fairly approximate continuously fed ones. The hydrolysis and acidogenesis processes resulted in the formation of intermediate volatile acids which were maintained in the system at a concentration higher than that which is considered growth limiting for the methanogenic bacteria. The biogas production rate rose steadily during the start up period of each experimental run until a quasi-steady state was achieved during which the effluent characteristics and the biogas production rate remained consistent. Reductions of up to 57.01%, 51.62% and 18.22% in the total solids, total COD, and total Kjeldahl nitrogen concentrations were achieved in the effluent.