這座新工廠由挪威公司Cambi AS負責建造，該公司經過與數家外商激烈競爭後取得標案，將利用熱水解技術（thermal hydrolysis），把廚餘、污泥用高溫高壓的方式煮沸而製成這種綠色新能源。
Stale bread, banana peels, coffee grounds and other food waste will be transformed into green fuel for Oslo's city buses starting next year. The Norwegian capital's new biogas plant will supply the fuel and also provide nutrient-rich biofertilizer for agriculture.
The plant will be able to process 50,000 tonnes of food waste annually, converting it to environment-friendly fuel for 135 municipal buses as well as enough biofertilizer for roughly 100 medium-sized local farms.
Biogas is a carbon dioxide-neutral fuel produced from biomass such as food waste, sewage sludge and manure.
Currently, 65 Oslo buses are powered by biogas produced from sludge from the city's sewage treatment plant. When the new biogas plant reaches its full capacity in 2013, the local bus company will have enough biogas for at least 200 buses.
"Running on biogas will reduce emissions from public transport, which means less airborne particulate matter and thus improved air quality in Oslo. What's more, the biogas buses run quietly," explains acting plant manager Anna-Karin Eriksson of the Oslo Municipality Waste-to-Energy Agency.
Biogas in buses means cleaner air and less noise for Oslo's 500,000 residents.
The plant is being constructed by the Norwegian company Cambi AS, which won the contract after intense competition with foreign companies.
Oslo's new biogas plant will produce the biogas using a method known as thermal hydrolysis, whereby raw materials such as waste or sewage sludge are boiled under high temperature and high pressure.
To date, the company has designed and delivered 28 plants for converting biodegradable material into renewable energy. Their plants are processing waste and sludge from a total of 23 million people in the United States, Australia, Chile, Japan, Dubai and many European countries.
Cambi has installed two plants for the treatment of household waste and industrial food waste - both in Norway.
The residue from the biogas production process may be used as liquid fertilizer with roughly the same nutrient content as compound fertilizer. The new plant, located north of Oslo, will supply both liquid and solid biofertilizer in addition to a liquid concentrate.