Effect of natural zeolite support on the kinetics of cow manure anaerobic digestion

• Autores: Rafael Borja Padilla, L. Travieso
• Localización: Biomass and bioenergy, ISSN 0961-9534, Vol. 5, Nº 5, 1993, pág. 395
• Idioma: inglés
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• Resumen

  • The kinetics of anaerobic digestion of cow manure has been studied using a batch bioreactor with biomass immobilized on zeolite and a control digester. The apparent kinetic constant, Ko, and the mean rate of methane production decreased considerably with substrate concentration in the control digester showing a major inhibition process due to ammoniacal nitrogen accumulation. However, in the zeolite digester, the kinetic constant was virtually invariable in the COD range studied (1.4–9.8 gl−1) due to the ionic exchange between the support and substrate. In addition, the yield coefficient was 5 times larger than the control digester for high substrate concentrations (9.8–10.3 g COD l−1).