Izvorni znanstveni članak
The quality of digested residue after anaerobic digestion of chicken manure
Neven Voća
Tatjana Krička
Tomislav Ćosić
Vlatko Rupić
Željko Jukić
Sanja Kalambura
Sažetak
The aim of this paper is to determine the quality of the digested residue after the process of anaerobic digestion by using chicken manure as a raw material. The research was conducted in the Republic of Austria in a plant for biogas production by means of anaerobic digestion at 35°C. The research comprised chemical analysis (pH, electrical conductivity, dry matter, burning residue, burning loss, organic matter, C, N, P, K, Ca, Mg, Na, Mn, Zn, Cu, Fe, Pb, Cd) and bacteriological tests of samples. .It was found that the digested residue in all of the samples, all of which were mildly alkaline, contained a low level of dry matter, 75% of which was organic matter. Biogenic elements in all investigated samples were present in moderate concentration; the values of heavy metals were within approved limits. The analysis of the N:P:K ratio, values of the biogenic elements and heavy metals, leads to the conclusion that the digested residues of chicken manure can be used in agricultural production, especially in plant production and grassland cultivation. Mesophilic and thermophilic microorganisms were found in the digested residue samples, but there were no criophilic microorganisms. Not one sample showed proof of pathogenic bacteria. All isolated bacteria were destroyed in the process of sterilization.
Ključne riječi
anaerobic digestion; chicken manure; digested residue; chemical analyses; bacteriological tests
Hrčak ID:
2126
URI
Datum izdavanja:
3.5.2005.
Posjeta: 2.587 *