茨城県におけるバイオディーゼル燃料の普及による下水処理への影響および二酸化炭素排出削減に関する分析

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  • Analysis of the Social and Environmental Impact of Biodiesel Fuel Refined from Used Cooking Oil in Ibaraki Prefecture
  • イバラキケン ニ オケル バイオディーゼル ネンリョウ ノ フキュウ ニ ヨル ゲスイ ショリ エ ノ エイキョウ オヨビ ニサンカ タンソ ハイシュツ サクゲン ニ カンスル ブンセキ

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Until now few studies have been carried out on the use of biodiesel fuel refined from used cooking oil (hereafter BDF) as motor car fuel. Most of these studies adopted an empirical approach to study BDF generated from used cooking oil. The used oil was usually collected and recycled by various municipalities and civilian organizations. However, no study has been carried out to evaluate the impacts of the use of BDF on the environment as well as on the overall profit system.<br> In this study, the amount of CO2 reduced through use of BDF for one year from April 2005 to March 2006 in Ibaraki Prefecture (the study area) was calculated. Moreover, the rate of mixing BDF with light oil for use, and distribution and promotion in Ibaraki Prefecture was considered. In addition, the amount of used cooking oil thrown down the drain during the year was calculated by obtaining information on the amount of used cooking oil processed in the sewage system from the Ibaraki Prefecture authorities. The reduction in CO2 emission from using BDF was also calculated. Finally, the social costs of the quantity of CO2 emissions were evaluated from the price of CO2-t in the emissions.<br> Results of this research, show that the amount of used cooking oil generated in Ibaraki Prefecture from April 2005 to March 2006 was 7,811.1 t (8.67 million liters) from which 7 million 803 thousand liters of BDF was produced. Moreover, a mixture of 1% BDF with light oil consumed during 2005 and 2006 reduced CO2 emissions by 19,500 tons.<br><br></i>JFL Classification: C80, Q20, Q28, Q25

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