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An exergy analysis for a wastewater treatment plant—an estimation of the consumption of physical resources

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The objective of this article is to exemplify how an exergy analysis could be used to estimate the consumption of physical resources at a wastewater treatment plant (WWTP). The exergy analysis has been performed for Luleå WWTP in Northern Sweden. About 60 000 population equivalents are connected to the WWTP, which has mechanical and chemical treatment. Flows included in the analysis are the wastewater heat, precipitants and other chemicals, organic matter and nutrients in the wastewater and biosolids, and electricity used for operation and maintenance. One conclusion is that the value of the heat is overestimated in a conventional energy analysis. Also, the organic matter probably represents the largest technical exergy flow. It is not clear how the exergy value of nutrients should be estimated.
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Keywords: BIOSOLIDS; ENERGY; EXERGY; NITROGEN; ORGANIC MATTER; PHOSPHORUS; WASTEWATER

Document Type: Research Article

Publication date: 1997-01-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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