3. Waste management and nutrient flows in the city of Turku: A detailed N and P flow study to estimate the capacity of biowaste sorting to contribute to nutrient recycling
2003 (English)In: Urban Environmental Management: Reports from the Superbs project / [ed] Lars Rydén, Uppsala: Baltic University Press , 2003, 1, 27-41 p.Chapter in book (Other (popular science, discussion, etc.))
A detailed quantitative study of flows of nitrogen and phosphorus in all organic waste in Turku was made to evaluate the potential of recycling of nutrients. Both inputs and outputs in all municipal and private sewerage, nutrient-containing fluent and solid waste flows were estimated. These included municipal and private sewerage, municipal solid waste, and municipal as well as private composting. The volume or weight of each of these was measured as well as their content of N and P either measured or estimated using reference values from literature. The total flows for the 170,000 inhabitants and their animals were found to be 3,074 kg of N and 583 kg of P per day. 64% of the inputs were found in the municipal wastewater, 11% in private sewarage, 10% in solid organic waste sent to incineration and 7% in organic waste sent to landfill. The major flows of output nitrogen included 53% (1,647 kg/day) to surface waters and 23% (765 kg/day), to sludge, while for phosphorus 15% (90 kg/day) went to surface waters and 61% (368 kg/day) to sludge. Only 1% of the nutrients were recycled for new agricultural production. If separate sorting of biowaste is achieved (planned for 2005) this figure will increase to 7% and with maximum recycling amount to 15-16%.
Place, publisher, year, edition, pages
Uppsala: Baltic University Press , 2003, 1. 27-41 p.
, Superbs Case Studies, 4
Water Engineering Environmental Analysis and Construction Information Technology Environmental Management
IdentifiersURN: urn:nbn:se:uu:diva-197095ISBN: 91-970017-5-9OAI: oai:DiVA.org:uu-197095DiVA: diva2:611970