Faculty Profiles - FUJIWARA Takeshi

Material flow analysis of PET bottle labels for a low-carbon society

- Habuer, Haruoka Tomoka, Fujiwara Takeshi

Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 32 23 2021

Language：Japanese Publisher：Japan Society of Material Cycles and Waste Management

From the viewpoints of marine plastic problems and global warming issues, reduction of marine pollution of plastics and conversion of 3Rs and renewable resources are required. Durable and hygienic PET bottles are indispensable to our lives because of their convenience. However, they account for 6% of the total amount of plastic waste every year in Japan. The purpose of this study is to construct a material flow (MFA) for PET bottle labels in Japan. As the results, the amount of PET bottle labels discarded in 2019 were calculated. The amount of labels calculated using the weight ratio of bottles to labels is about 26,000 tons, while the amount of labels calculated using the average weight of labels is about 25,000 tons. Comparing the two calculation methods, there was a difference of 200 tons for roll labels and 1,000 tons for shrink labels. This is probably because the ratio of roll labels to shrink labels is assumed and the capacity of PET bottles is not distinguished.

DOI： 10.14912/jsmcwm.32.0_23

Analysis on citizen's discharge behavior of cleaning up waste after disaster : focusing on flood disaster in Mabi town, Kurashiki city

Fujiwara Takeshi, Moriwaki Naoki, Namikoshi Hiroya

Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 31 113 2020

Authorship：Lead author,　Corresponding author Language：Japanese Publisher：Japan Society of Material Cycles and Waste Management

Due to the heavy rain that hit West Japan in July 2018, a large-scale flood occurred in Maki-machi, Kurashiki city due to the river collapse on the 7th, and the heavy rain that hit West Japan in July resulted in 7 in Mabi-cho, Kurashiki-shi. Large-scale floods occurred daily due to river collapse, resulting in approximately 440,000 tons of flood damage. When the house cleaning starts, they are discharged all at once in the area, which causes a shortage of storage space and waiting for garbage collection. In Mabi-cho, there is an illegal discharge site where citizens can bring in garbage by car under the elevated road construction site along National Route 486 and under the Ihara Railway Ihara Line, and the Self-Defense Forces will remove it. In order to control the discharge of clean-up trash immediately after the occurrence of a disaster and to make a plan to collect it quickly, it is effective to first analyze the clean-up trash discharge behavior actually taken by the victims. Therefore, in this study, we conducted a questionnaire survey on the victims of Mabi-machi, Kurashiki city, and analyzed the recognition of discharge rules, the possibility of separation, the place of waste discharge, and the reason why they were dumped at illegal discharge sites.

DOI： 10.14912/jsmcwm.31.0_113

Waste discharge modeling of cleaning up waste after disaster and waste collection strategies: focusing on flood disaster in Mabi town, Kurashiki city

Fujiwara Takeshi, Namikoshi Hiroya, Moriwaki Naoki

Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 31 117 2020

Authorship：Lead author,　Corresponding author Language：Japanese Publisher：Japan Society of Material Cycles and Waste Management

Due to the heavy rain that hit western Japan in July 2018, a large-scale flood occurred in Manabi-cho, Kurashiki city on the 7th, which caused about 440,000 tons of flooded waste. When the cleaning of houses starts after the disaster, they are discharged all at once in the area, which causes a shortage of storage space and waiting for garbage collection. In previous research 1), it was found that if the collection of waste is delayed, the storage space becomes full, which causes illegal discharge. In the event of a disaster, it is necessary to smoothly collect and remove disaster waste from the disaster area, and for that purpose, it is important to first understand the characteristics of the waste discharge time of clean-up waste. In this study, we conducted a questionnaire survey on the victims of Mabi-machi, Kurashiki City, clarified the emission characteristics and emission timing of each type of cleanup waste, and created an emission model. Then, for the waste discharge from the target area, a collection strategy was established and a collection simulation was conducted.

DOI： 10.14912/jsmcwm.31.0_117