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Biological phosphorus removal at temperatures from 3 to 10°C: a full-scale study of a sequencing batch reactor unit
Luleå tekniska universitet.
1994 (English)In: Canadian journal of civil engineering (Print), ISSN 0315-1468, E-ISSN 1208-6029, Vol. 21, no 1, p. 81-88Article in journal (Refereed) Published
Abstract [en]

Low temperature biological phosphorus removal technology was tested at a small village wastewater treatment plant near the Arctic circle. An aeration basin in a conventional activated sludge step was retrofitted to a sequencing batch reactor with a maximum volume of approximately 27 m3. The study period was November 1989 to June 1991. The wastewater temperature varied between 3 and 10°C during one full year and was below 5°C during approximately 240 days of the year. A total sequencing batch reactor cycle time of 6-12 hours produced a phosphorus reduction of 70-80%. During the same time, biochemical oxygen demand (BOD7) reductions varied between 70% and 90%. These reductions were achieved at supernatant suspended solid concentrations of 20-30 mg/L. Effluent soluble phosphorus concentrations were usually lower than 1.0 mg/L at water temperatures down to 5°C. At 4°C, a sharp increase to greater than 2.0 mg/L was evident. Supernatant soluble BOD7 was less than 8 mg/L and was found to be independent of temperature.

Place, publisher, year, edition, pages
1994. Vol. 21, no 1, p. 81-88
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-8559Local ID: 71278b80-f1a0-11db-bb1b-000ea68e967bOAI: oai:DiVA.org:ltu-8559DiVA, id: diva2:981497
Note
Godkänd; 1994; 20070423 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-21Bibliographically approved

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