Now the food waste turns into biogas

Published Jul 08, 2019

Almost 40 percent of the content in the city's garbage bags is food waste, according to Stockholm Water and Waste. Soon the food waste from the lunch rooms at ITM can be sorted out and converted into biogas and bio fertilizer. In July everything will be prepared and ready.

For some time, KTH Sustainability Office has led a project to implement sorting of food waste at KTH and soon it is time to move from words to action. At the ITM School, all lunch rooms and garbage rooms are reviewed and will be ready for sorting food waste before the end of July. In all kitchenettes you can then throw your food waste into specific bins, and the waste rooms will be prepared so that the cleaning staff can carry the waste further. By sorting out food waste we contribute to the regional cycle.

Look for the garbage bins for food waste and information boards in the lunch rooms!

Facts about biogas and bio fertilizer from food waste

The biogas is used for fuel for garbage truck, buses and passenger cars instead of petrol and diesel. It reduces the emissions of nitrogen oxides and other harmful particles in the air. In addition to replacing the fossil fuels, the biogas also produces reduced greenhouse gas.

Bio-fertilizers are used as plant nutrients for arable and forest land. By fertilizing with bio-fertilizer, nutrition and humus are returned to the cycle. When replacing fertilizer with bio-fertilizer, the need for phosphorus, which is a finite resource, decreases. Also, the nitrogen which is naturally present in the bio-fertilizer is very energy-intensive to produce in an artificial way.

Source: Stockholm Water and Waste

Internal news from the ITM School