A group of students from King’s College International School Bangkok developed the Drip Drop Machine, a device for recycling used cooking oil (UCO) and creating biofuel. The machine can be used by street vendors and communities in remote areas.
The project was led by Boonyada Sangmanee and Nichanun Subsompon, with support from team members Poramit Sangmanee and Nattheera Subsompon. The students aimed to address the challenge of improper oil disposal, which is common in Thailand and other developing regions.
The machine collects used cooking oil remotely and tests its quality using smart sensors. It detects oil volume and water content to assess whether it is suitable for creating biofuel.
Users pour their used oil into the device, which calculates its value. If the oil meets standards, the machine dispenses payment or credits linked to the user’s phone. If not, the oil is drained into a separate tank for return.
Currently, users register with their mobile number directly through the device; an app is planned for future convenience. The device aims to create a new supply channel for used oil, extending access beyond commercial sources.
The collected oil can be processed into biofuel, including sustainable aviation fuel (SAF). This supports efforts for cleaner transportation fuels.
The device also has social and environmental benefits. It can generate income for users, increase awareness about recycling, and reduce improper disposal of vegetable oil.
Plans include deploying machines in schools to raise awareness and installing them in streets, villages, and communities to improve accessibility.
One challenge is accurately measuring oil, especially when it contains water or food residues. Future designs will include filtering and moisture measurement systems.
The Drip Drop Machine has received international recognition in 2025, winning awards at various invention competitions, highlighting its potential to support circular economy solutions.
