Researchers at Loughborough University have been collaborating with colleagues in Thailand to develop a small scale biogas system that converts food waste to methane and can be monitored via the internet.
The project – which is supported by the Department of Business Innovation and Skills UK, National Science and Technology Policy Office Thailand and the British Council Newton Fund – has the objective to develop better waste management practices, promote waste-to-energy and establish exchange links between UK and Thailand.
The collaboration has led to the installation of two biogas plants – one at Loughborough University and one on the AIT campus in Bangkok – that use cafeteria waste as the feedstock.
Converting food waste to biogas has societal and environmental benefits and is carried out by a process called anaerobic digestion.
It increases accessibility to regulated, rigorous and safer waste treatment and decreases the use of fossil fuels – in particular, wood burning in developing countries.
This lowers harmful air pollution and smoke emissions which in turn improves the quality of life and wellbeing of people.
As well as contributing to the greater sustainability of both campuses, the project supports the Thai government’s aim for decreased dependence on imported sources of energy and decentralized generation of energy at community scale.
This has challenges and what is unique about the biogas system the academics have developed is the ability to remotely monitor its performance via the internet.
The pilot plants will serve as a classic model of how the biogas industry could be revolutionized, installed and operated in the future.
The biogas plants – or Biogas Plants 4.0 as they are known – will be associated with higher efficiency and energy yield.
Professor Chettiyappan Visu, who is leading the AIT team with Dr Abdul Salam, explained: “By embedding sensors with the digester, the pulse of the plant is heard from miles away.
“The quality of the biogas generated is monitored by employing a sophisticated online biogas analyzer.
“With real-time data generated, analytical work becomes much simpler. Whenever there is a deviation of the data trend from the optimal range, appropriate precautionary measures are taken to prevent any irreversible damage to the biogas plants.
“A low-cost monitoring platform eliminates the need for complex experimental procedures that were not previously viable at decentralized level.”
The performance parameters of both pilot plants are checked in regular time intervals and the information is sent to a joint web portal.
In this way, a concept of centralized monitoring of decentralised biogas generation has been achieved, where monitoring is enabled in real time.
Researchers from both Loughborough University and AIT have access to the joint web portal and real-time data, enabling them to observe performance parameters of both digesters, regardless of them being at great distance geographically.