Bioenergy and Material Production Potential by Life Cycle Assessment in Swine Waste Biomass
2011
Kim, S.H., Biogas Research Center, Hankyong National University, Anseong, Republic of Korea | Kim, C.H., Biogas Research Center, Hankyong National University, Anseong, Republic of Korea | Yoon, Y.M., Biogas Research Center, Hankyong National University, Anseong, Republic of Korea
As a result of the growing livestock industry, varieties of organic solid and waste biomass are be generated in swine breeding and slaughtering stages. Anaerobic digestion is a promising alternative for the treatment of livestock waste biomass, as well as for the material recovery and energy production. Objectives of this study were to analyze the biochemical methane potential of swine waste biomasses that were generated from swine pen and slaughterhouse and to investigate the material recovery and methane yield per head. As pig waste biomass, swine slurry, blood, intestine residue, and digestive tract content were collected for investigation from pig farmhouse and slaughterhouse. The B∧th (Theoretical methane potential) and B∧o (Biochemical methane potential) of swine slurry generating in swine breeding stage were 0.525 and 0.360 N㎥ kg-¹-VS∧added, the ratio of degradation (B∧o/B∧th) was 68.6%. B∧th of blood, intestine residue, and digestive tract content were 0.539, 0.664, and 0.517 N㎥ kg-¹-VS∧added, and B∧o were 0.405, 0.213, and 0.240 N㎥ kg-¹-VS∧added, respectively. And the ratio of degradation showed 75.1, 32.1, and 46.4% in blood, intestine residue, and digestive tract content. Material yield of swine waste biomass was calculated as TS 73.79, VS 46.75, TN 5.58, P₂O∧5 1.94, and K₂O 2.91 kg head-¹. And methane yield was 16.58 N㎥ head-¹. In the aspect that slaughterhouse is a large point source of waste biomass, while swine farmhouse is non-point source, the feasibility of an anaerobic digestion using the slaughtering waste biomass need to be assessed in the economical aspect between the waste treatment cost and the profitable effect by methane production.
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