title: Methane potential of sterilized solid slaughterhouse wastes.
abstract: The aim of the current study was to determine chemical composition and methane potential of Category 2 and 3 solid slaughterhouse wastes rendering products (SSHWRP) viz. melt, decanter sludge, meat and bone meal (MBM), technical fat and flotation sludge from wastewater treatment. Chemical analyses showed that SSHWRP were high in protein and lipids with total solids (TS) content of 96-99%. Methane yields of the SSHWRP were between 390 and 978 m(3) CH(4)/t volatile solids (VS)(added). Based on batch experiments, anaerobic digestion of SSHWRP from the dry rendering process could recover 4.6 times more primary energy than the energy required for the rendering process. Estonia has technological capacity to sterilize all the produced Category 2 and 3 solid slaughterhouse wastes (SSHW) and if separated from Category 1 animal by-products (ABP), it could be further utilized as energy rich input material for anaerobic digestion.
authors.affiliation: Department of Chemistry, Tallinn University of Technology, 12618 Tallinn, Harjumaa, Estonia. peeppitk@gmail.com
authors.forename: Peep
authors.initials: P
authors.lastname: Pitk
authors.forename: Prasad
authors.initials: P
authors.lastname: Kaparaju
authors.forename: Raivo
authors.initials: R
authors.lastname: Vilu
mesh_terms: D000003:Abattoirs; D000818:Animals; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D018533:Biomass; D002417:Cattle; D004957:Estonia; D008372:Manure / Q000032:analysis; D008460:Meat; D008697:Methane / Q000096:biosynthesis*; D011200:Poultry; D012037:Refuse Disposal; D013242:Sterilization; D034421:Sus scrofa; D013816:Thermodynamics; D014866:Waste Products / Q000032:analysis*
chemical_list: D008372:Manure; D014866:Waste Products; D008697:Methane