Methane potential of sterilized solid slaughterhouse wastes

► Solid slaughterhouse waste rendering products CH4 yields are 390–978m3 CH4/tVSadded. ► Addition of 5% melt to manure increased the CH4 production by 2.70times. ► One ton of melt has 14times higher fertilizer value compared to analysed manure. The aim of the current study was to determine chemical...

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Bibliographic Details
Published inBioresource technology Vol. 116; pp. 42 - 46
Main Authors Pitk, Peep, Kaparaju, Prasad, Vilu, Raivo
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.07.2012
Subjects
Abattoirs
Anaerobic digestion
Animals
Batch Cell Culture Techniques
Biodegradation, Environmental
Biogas
Biomass
Byproducts
Categories
Cattle
Estonia
Manure - analysis
Meat
Methane
Methane - biosynthesis
Methane potential
Poultry
Refuse Disposal
Rendering
Rendering plant waste
Slaughterhouses
Sludge
Solid slaughterhouse wastes
Sterilization
Sus scrofa
Thermodynamics
Waste Products - analysis
Wastes
Estonia
Solid slaughterhouse wastes
Biogas
Methane potential
Rendering plant waste
Anaerobic digestion
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Summary:► Solid slaughterhouse waste rendering products CH4 yields are 390–978m3 CH4/tVSadded. ► Addition of 5% melt to manure increased the CH4 production by 2.70times. ► One ton of melt has 14times higher fertilizer value compared to analysed manure. 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 978m3 CH4/t volatile solids (VS)added. Based on batch experiments, anaerobic digestion of SSHWRP from the dry rendering process could recover 4.6times 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.
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ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2012.04.038