Gaobeidian Water Reclamation Plant realizes biogas cogeneration
The reporter recently learned from the Municipal Development and Reform Commission that the biogas cogeneration project of Gaobeidian Reclaimed Water Plant has achieved grid-connected power generation, with an estimated annual power generation of 30 million kilowatt hours and an annual reduction of 18,000 tons of carbon dioxide emissions.
The biogas cogeneration project of Gaobeidian Water Reclamation Plant is a key renewable energy power generation project in Beijing and an excellent pilot project of advanced low-carbon technology in Beijing, with a total installed capacity of 6.4 MW and a total of 4 biogas generating units. The plant's sludge is treated with thermal hydrolysis and advanced anaerobic digestion to produce more than 20 million cubic meters of biogas per year. The biogas is dehydrated, desulfurized, siloxane removed, and pressurized by the pretreatment unit and then sent to the biogas generator set to generate electricity. At present, the generator set has been connected to the 10 thousand volt power grid of Gaobeidian Reclaimed Water Plant, and the generated power will be used for the self-use production of the water plant.
Biogas cogeneration projects not only generate electricity, but also provide heat. The project efficiently recovers the waste heat generated by the generator, which is used for the heat of the sludge thermal hydrolysis process and the heating of the whole plant, effectively realizing clean energy substitution.
The implementation of the biogas cogeneration project of Gaobeidian Water Reclamation Plant is of great significance for the city to further increase the proportion of renewable energy application and help green and sustainable development. The project is expected to generate 30 million kWh of electricity per year, accounting for about 22% of the plant's annual electricity consumption, which can greatly reduce the cost of purchased electricity. At the same time, the annual carbon dioxide emission reduction is about 18,000 tons, which has significant energy saving and carbon reduction benefits.
