2009 Volume 5 Issue 4 Pages 542-546
Objective. Ajinomoto Co., Inc. has developed “CO2 emission factor database of food raw materials”（Ajinomoto DB）and opened it to the public on the homepage since 2007. The emission factors are based on weight or volume. An emission factor is calculated based on one’s producer price（Million Yen per tonne or Million Yen per kilo litter）and CO2 emission which are shown as t-CO2 per Million Yen in the 3EID in same segment. It covers wide data related to food to perform Life cycle（LC）-CO2 analysis easily. However, it has some problems in practical use. In this report, the solutions or notes are reported.
Results and Discussion. As the first problem, it is necessary for CO2 emission factors of perishable foods etc. in Ajinomoto DB to be allocated between the edible part and inedible part included in the amount of producer dealings. In many cases, the inedible part was abandoned so it is preferable to divide the CO2 emission by the weight or volume ratios of edible part to calculate actual emission factors in the database. As the second problem, a lot of raw materials for the food manufacturing are not found in the database. In this case, those can be checked in Japan’s Tariff Schedule and to make the HS code correspond to column code in Japanese Input-Output tables. As the third problem, CO2 emission factors of articles of the small amount of production in the industry segment possibly far apart from the realities. When they are used, it is necessary to note it.
Conclusions. In this report, some problems in Ajinomoto DB were reported, and it was found that they were able to be solved.