Japan – used cooking oil recycled as bio-diesel fuel

Japanese RCS is an incorporated nonprofit organization located in Kyoto, Japan, that aims to promote a resource-circulating society. It collects used cooking oil from restaurants and households in Kyoto City and recycles it into clean and environmentally friendly bio-diesel fuel



Japan for sustainability (JfS) reports that at present households and restaurants across Japan generate about 400,000 tons of used cooking oil annually. While the used oil from businesses is recycled into animal feed, coating materials, soap, etc., used oil from households is rarely collected or recycled, and is usually disposed of as raw garbage.



Revo International Co., Ltd., a Kyoto-based company and a corporate member of RCS, recycles the collected used cooking oil into a bio-diesel fuel named “C-FUEL”. This bio-diesel fuel emits about ten percent less carbon dioxide and only one-third to one-sixth of the black smoke emitted by ordinary diesel oil.



Containing little sulphur oxide, which causes acid rain, this clean fuel made from recycled resources is drawing attention as a next-generation alternative diesel oil. C-FUEL made from recycled cooking oil is supplied to all of the roughly 220 garbage collection trucks and about 80 city buses in Kyoto City, as well as to other municipal governments, such as Minoo in Osaka Prefecture, and Uji and Yawata in Kyoto Prefecture. The fuel is also supplied to private carriers in other nearby cities.

Check Also

Waste management poses challenges, but could unlock major environmental and economic gains

Every day, the city of Rio de Janeiro, one of the largest metropolises in the Southern Hemisphere, generates 17,000 tonnes of waste, ranging from large industrial debris to candy wrappers bought innocently at newspaper stands. While this waste presents a serious and urgent environmental challenge, it also fuels an increasingly significant portion of the economy, with benefits extending beyond financial gains. - When we look at developed European countries, many are already recycling between 40% and 50%, with some reaching 60%. From an economic standpoint, both recyclable materials and organic waste hold tremendous value - stated Adalberto Maluf, National Secretary for Environment and Environmental Quality at the Ministry of the Environment (MMA), during the Methane Forum: Climate Emergency Brake, at the Rio Nature and Climate Week. Citing a 2025 report, Maluf mentioned that Brazil literally throws away R$27 billion annually, while municipalities spend significantly more - R$45 billion - managing all this waste, often overlooking the environmental impact or economic potential buried in landfills and dumps. - We spend R$45 billion to collect and dispose of waste in landfills, yet we manage to recycle less than a third of the potential. I believe it will be necessary to review contracts, create performance-based remuneration mechanisms, and pay for both effectively sorted materials and those diverted from landfills - he added. According to the IBGE, 60.5% of Brazilian municipalities adopt some form of selective waste collection, and several initiatives serve as examples of how to manage city waste. In his panel presentation, Bernardo Ornelas, Project Coordinator at the Rio de Janeiro Municipal Urban Cleaning Company (Comlurb), highlighted Ecoparque do Caju, a national benchmark in waste management and recycling. There, received materials are sorted and can be used for biogas production, organic compounds for urban gardens, or human consumption, in the case of still...