Evaluation of regional bioenergy recovery by local methane fermentation thermal recycling systems.
This paper evaluates the potential for regional bioenergy recovery as electricity and heat by small-scale methane fermentation systems from organic waste matter generated from urban, industrial, and agricultural sectors. Biogas production functions of high-strength organic wastes are derived from data of implemented methane fermentation systems. The distributions of organic wastes from sewage, household, wholesale/retail, manufacturing, farming, and livestock activities in the Tokyo Bay region are calibrated into a disaggregated spatial database by compiling general activity statistics and emission intensity parameters using Geographic Information System (GIS). Three scenarios of organic matter circulation by co-digestion in sewage treatment plants (STPs) are designed and assessed. Surplus electricity and heat from methane fermentation systems are used for STP operations and household demand. The spatial database allows a preliminary examination for the suitability of locations for technology implementation from the aspects of bioenergy supply and balance. The results show that an additional 368,000-1,328,000 MW of electricity would be generated, and 1300-3600 TJ of heat could be used by households, reducing the annual emissions of CO2 from fossil fuels by 307,000-798,000 t.
Wong
Looi-Fang
LF
Department of Civil Engineering, Toyo University, 2100 Kujirai, Kawagoeshi, Saitama 350-8585, Japan. wlooifang@yahoo.com
Fujita
Tsuyoshi
T
Xu
Kaiqin
K
D000818:Animals; D000829:Animals, Domestic; D002245:Carbon Dioxide / Q000032:analysis; D002681:China; D003247:Conservation of Natural Resources; D004560:Electricity; D005285:Fermentation; D005502:Food; D005579:Fossil Fuels / Q000032:analysis; D005740:Gases / Q000032:analysis; D006801:Humans; D008697:Methane; D009930:Organic Chemicals; D012037:Refuse Disposal / Q000379:methods; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods; D014866:Waste Products / Q000032:analysis
D005579:Fossil Fuels; D005740:Gases; D009930:Organic Chemicals; D012722:Sewage; D014866:Waste Products; D002245:Carbon Dioxide; D008697:Methane