Konferensartikel

This research worked on the measure against CO₂ reduction according to the characteristics of the area for the Kanazawa seaside area in Yokohama city. This area consists of a collective housing complexes and a minor scale industrial complex; and also locates a waste incineration plant; a wastewater treatment plant; and a sludge treatment facility. Having been chosen as a measure with the large amount of CO₂ discharge reduction; it is the system which feeds into an incinerator the methane gas by carrying out mixed digestion of the kitchen garbage together with sewer sludge; and supply heat from a waste incineration factory through the transmission line. However; since this system has large initial cost for construction of transmission line; marginal abatement cost (MAC) for CO₂ emission reduction is very as large as 166.16 [USD/CO₂]. Then; when the pay-back year of the transmission line was changed from 20 years to 31.5 years which is equivalent to 70% of legal durable years; MAC was reduced to 104.40 [USD/CO₂]. Moreover; when Non Energy Benefit (NEB) by system introduction; such as job creation and an environmental improvement of the area; was taken into consideration; MAC was greatly reduced to -124.22 [USD/CO₂].

Exhaust heat from waste incineration plant; Solar energy; Digestion of sewage sludge mixed with kitchen garbage; CO₂ reduction cost