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Swedish field experiences woth chemical precipation in stabilization ponds
1984 (English)In: Cold regions engineering: northern resource development : 3rd International specialty conference : Papers / [ed] Daniel W. Smith, Canadian Society for Civil Engineering , 1984, 547-564 p.Conference paper (Refereed)
Abstract [en]

Swedish sewage treatment plant history shows a development towards compact plants. For smaller communities with big changes in flow and temperature, the compact plants offer several problems. Yearly studies of chemical precipitation in stabilization ponds have demonstrated an overall reduction of organic matter (as COD) with about 75% to a level of somewhat below 100 mg O//2/1, and a reduction of total phosphorus with 90% to a level of about 0. 7 mg P/1. These values were reached under ordinary operation of the plants and no optimization efforts have been made. All wastewater have been treated (no over-flows). Two tracer studies (Rhodamine B) have demonstrated the appearance of strong short-circuiting flows in ponds systems and the inserting of simple walls is recommended to avoid an at least hygienic risk. Sludge collection in ponds can be carried out by a dredger or by emtying the pond and using an excavator. Both ways have been successfully tried in full scale in Sweden.

Place, publisher, year, edition, pages
Canadian Society for Civil Engineering , 1984. 547-564 p.
Research subject
Urban Water Engineering
URN: urn:nbn:se:ltu:diva-35814Local ID: a7dd0b20-a106-11dd-8f4e-000ea68e967bISBN: 919305601 OAI: diva2:1009068
Cold regions engineering : 17/12/1984 - 17/12/1984
Godkänd; 1984; 20081023 (andbra)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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Hanaeus, Jörgen

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