Biogas is future-oriented because it is neutral in CO2 Emisions and, unlike natural gas, a renewable energy source. It can be obtained from sludge at the municipal water treatment plants, but the quantity to be harvested within the plants is not enough for a profitable industrial production.
Erik Danielsson, founder of Scandinavian Biogas, came to the same conclusion. This is why he started to combine sludge from the water treatment plant with other waste from agriculture and the food industry which otherwise are disposed of separately causing high expenses. He obtained a perfect mix for the production of high quality biogas.
His first plant in Ulsan, South Korea, is a converted common water treatment plant of smaller size. Before, this plant depended on tax revenues for operation. Now it generates its own revenue with several cash flows: gate fees for food waste, sales revenue from refined biogas for vehicles and also for liquid CO2, and from selling heat. This is an example for intelligent clustering of industries, a characteristic for the Blue Economy.