Anaerobic digestion (AD) is widely used for treatment of
organic waste for biogas production. Codigestion of agricultural wastes with
various substrate combinations is one of the ways to increase and stabilize
biogas yield. The influence of co-substrates on kinetics of methane production
in anaerobic fermentation of pig and manure slurry was studied by performing a
series of laboratory experiments using food waste, biowaste and winemaking
waste as co-substrates. Experiments were performed in the laboratory reactors
of «Hohenheim» biogas testing system in batch mode at the temperature of 37ºC.
Methane production rate was used to evaluate co-digestion of agricultural
slurry. Research results showed that co-substrates gave significant effect to
methane production kinetics. The kinetic parameters of methane production i.e.
potential yield of methane (P), maximum methane yield rate (Rm) and duration of
lag-phase (λ) were analyzed using modified Gompertz equation. Technical time to
produce 95% of potential methane yield was investigated and efficient period of
anaerobic digestion was calculated. The potential production of methane was
reached in lag-phase duration (λ) of about 10-15 days. Maximal methane
production rate was reduced 2-3 times in codigestion than in mono-digestion of
pig and cattle manure during anaerobic digestion for 35 days.
Author (s) Details
Karlygash Korazbekova Author (s) Details
Department of Chemistry, Biology and Geography, Y. Altynsarin Arkalyk State Pedagogical Institute Arkalyk, Kazakhstan.
View Book :- http://bp.bookpi.org/index.php/bpi/catalog/book/206
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