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 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.

[1]  W. J. Dyer,et al.  A rapid method of total lipid extraction and purification. , 1959, Canadian journal of biochemistry and physiology.

[2]  A. M. Paton,et al.  Antibacterial activity of long chain fatty acids and the reversal with calcium, magnesium, ergocalciferol and cholesterol. , 1971, The Journal of applied bacteriology.

[3]  Keisuke Hanaki,et al.  Mechanism of inhibition caused by long‐chain fatty acids in anaerobic digestion process , 1981 .

[4]  D. M. Sievers,et al.  Buffer stability in manure digesters , 1982 .

[5]  Willy Verstraete,et al.  Influence of high NaCl and NH4Cl salt levels on methanogenic associations , 1984 .

[6]  E. Samain,et al.  Influence of Calcium Addition on Growth of Highly Purified Syntrophic Cultures Degrading Long-Chain Fatty Acids , 1985, Applied and environmental microbiology.

[7]  Andrew G. Hashimoto,et al.  Ammonia inhibition of methanogenesis from cattle wastes , 1986 .

[8]  I. Koster,et al.  Inhibition of Methanogenesis from Acetate in Granular Sludge by Long-Chain Fatty Acids , 1987, Applied and environmental microbiology.

[9]  W. P. Tritt,et al.  Materials flow and possibilities of treating liquid and solid wastes from slaughterhouses in Germany. A review , 1992 .

[10]  V. Vavilin,et al.  Simulation model ‘methane’ as a tool for effective biogas production during anaerobic conversion of complex organic matter , 1994 .

[11]  A. Rinzema,et al.  Bactericidal effect of long chain fatty acids in anaerobic digestion , 1994 .

[12]  Charles J. Banks.  Anaerobic digestion of solid and high nitrogen content fractions of slaughterhouse wastes , 1994 .

[13]  Irini Angelidaki,et al.  Anaerobic thermophilic digestion of manure at different ammonia loads: Effect of temperature , 1994 .

[14]  B. Ahring,et al.  Anaerobic digestion of swine manure: Inhibition by ammonia , 1998 .

[15]  E. J. Birch,et al.  Anaerobic batch digestion of sheep tallow , 1998 .

[16]  E. Salminen,et al.  Anaerobic Digestion of Poultry Slaughtering Wastes , 1999 .