【Paper】
An Analysis of the Quantitative Relation of Recyclable Waste to Domestic Refuse Based on Continued Actual Survey Data
Yasuhiro Arai*, Akira Koizumi*, Noboru Tanikawa** and Tomo Oikawa***
* Graduate School of Engineering, Tokyo Metropolitan University
** Graduate School of Engineering, Hokkaido University
*** Tokyo Metropolitan Research Institute for Environmental Protection
† Correspondence should be addressed to Yasuhiro Arai:
Graduate School of Engineering, Tokyo Metropolitan University
（1-1 Minamiosawa, Hachioji, Tokyo, 192-0397 Japan）

Abstract
The purpose of this analysis was to show the quantitative relation of the recoverable amount of recyclable waste and domestic refuse generated from households. Continuous actual survey data was collected from questionnaires and waste generation measurements. In this paper, we made an analysis on the differences of the recoverable amount of recyclable waste for papers and plastics, and the effects of waste reduction.
Firstly, we examined the change in the total amount of waste generated between each survey period, and we classified the data into three groups taking into consideration the difference in this amount. Secondly, we defined the ratio R/D to be that of the recoverable amount of recyclable waste to domestic refuse generated from a household. We examined the data for composition of refuse, and showed the difference in the recoverable amount for each type of composition. Thirdly, in order to show the variations in the recoverable amount of papers and plastics, we conducted a comparative analysis between one group of “top quartile” and another of “others” for the ratio R/D. Lastly, we showed the quantitative relation of the recoverable amount of recyclables and domestic refuse. Here it was revealed that there were definite differences.

Key words: domestic refuse, recyclable waste, waste reduction, continued actual survey, quantification theory