Scottish researchers said on May 16 that they hope to study a new type of low-energy wastewater treatment system for the drainage characteristics of developing countries. The system can also generate electricity while treating sewage. The research team has already received a £1 million grant from the British Engineering and Natural Sciences Research Council. It is reported that scientists will first use bioengineering microorganisms to make it possible to decompose a large amount of solid waste through the anaerobic digestion process in the reactor. Existing anaerobic digestion technology has been widely used in effluent treatment in brewing plants and pharmaceutical plants. Researchers hope to capture the gas generated during anaerobic digestion for power generation. As the process does not generate other waste, the researchers also hope that this process can be used for wastewater treatment in developed countries. At present, the research team has not found a way to capture the gas produced by the system. At the same time, they also need to determine how large the system is for developing countries to use a flexible and acceptable scale. In addition, how to transport the waste to the digestion reactor is another difficult problem to study.