6533b7ddfe1ef96bd1274a4c
RESEARCH PRODUCT
Mesophilic co-digestion of dairy manure and lipid rich solid slaughterhouse wastes: process efficiency, limitations and floating granules formation.
B. FernándezPeep PitkJ. PalatsiPrasad KaparajuRaivo Vilusubject
Environmental EngineeringChromatography GasBioengineeringAmmoniachemistry.chemical_compoundBacteria AnaerobicBiogasBioenergyAnimalsFood scienceWaste Management and DisposalWaste ProductsWaste managementRenewable Energy Sustainability and the EnvironmentFatty AcidsSpectrometry X-Ray EmissionAgricultureGeneral MedicineBiodegradationTotal dissolved solidsLipid MetabolismManureManureAnaerobic digestionchemistryBiofuelslipids (amino acids peptides and proteins)CalciumCattleFemaleMethaneAbattoirsMesophiledescription
Lipid and protein rich solid slaughterhouse wastes are attractive co-substrates to increase volumetric biogas production in co-digestion with dairy manure. Addition of decanter sludge (DS), containing 42.2% of lipids and 35.8% of proteins (total solids basis), up to 5% of feed mixture resulted in a stable process without any indication of long chain fatty acids (LCFA) or free ammonia (NH3) inhibition and in 3.5-fold increase of volumetric biogas production. Contrary, only lipids addition as technical fat (TF) at over 2% of feed mixture resulted in formation of floating granules (FG) and process efficiency decrease. Formed FG had low biodegradability and its organic part was composed of lipids and calcium salts of LCFAs. Anaerobic digestion process intentionally directed to FG formation, could be a viable option for mitigation and control of lipids overload and derived LCFA inhibition.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-04-08 | Bioresource technology |