Anaerobic Digestion Of Cattle Manure:
Effect Of Phase-separation
Author(s)
V. Yılmaz & G. N. Demirer
Abstract
Various aspects of anaerobic digestion (AD) technology have been the focus of
research in recent years. Shortening the digestion time with enhanced process
efficiency is one of the integral concerns in AD technology. This study was
conducted to investigate the feasibility of a two-phase anaerobic treatment
system for unscreened dairy manure. Hydraulic retention time (HRT) and
organic loading rate (OLR) in the hydrolytic reactor are varied in order to
evaluate the effect of these factors. The results showed that an optimum HRT
and OLR of 2 days and 15 g.VS/L.day, respectively, yielded maximum
acidification. The separation of acidogenic and methanogenic phases of digestion
resulted in a significant increase in methane production rate in the methane
reactor. The methane yields were found to be 313 and 221 mL CH4/g.VS loaded
in two-phase and one-phase systems at 35°C, respectively.
Keywords: anaerobic digestion, dairy manure, two-phase, methane.
1 Introduction
With the rapid depletion of conventional energy sources, the need to find
alternative, but preferably renewable, sources of energy is becoming increasingly
acute. Through anaerobic digestion of biomass, including animal wastes, useful
energy can be obtained [20]. Biogas plants are expected to be an effective
solution to the manure management problem providing benefits such as energy
saving, environmental protection and reduced CO2 emissions.
Anaerobic digestion of organic matter became more and more attractive in the
recent past because new reactor designs significantly improved the reactor
Keywords
anaerobic digestion, dairy manure, two-phase, methane
Related Book
Other papers in this volume
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