Anaerobic batch degradation of solid poultry slaughterhouse waste.
We studied anaerobic batch degradation of solid poultry slaughterhouse wastes with different initial waste and inoculum concentrations and waste-to-inoculum ratios and simulated the dynamics of the process with a new generation <METHANE> model. Our modelling results suggest that inhibited propionate degradation by long-chain fatty acids (LCFA) and inhibited hydrolysis by a high propionate concentration constituted the rate-limiting step in the waste degradation. Palmitate was the most abundant LCFA in the assays. Within 27 days of incubation, up to 0.55 to 0.67 m3 of methane (STP)/kg VS added was produced under the studied conditions. Lower waste-to-inoculum ratios exhibited a faster onset and rate of specific methane production. In all the assays, ammonification occurred within 3 to 6 days and accounted for 50 to 60% of total nitrogen.
Salminen
E
E
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FIN-40351 Jyväskylä, Finland. esa.salminen@jyu.fi
Rintala
J
J
Lokshina
L Y
LY
Vavilin
V A
VA
D000003:Abattoirs; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D003198:Computer Simulation; D005230:Fatty Acids, Nonesterified / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D008697:Methane / Q000032:analysis; D008954:Models, Biological; D011200:Poultry / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*
D005230:Fatty Acids, Nonesterified; D005232:Fatty Acids, Volatile; D008697:Methane