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Exergy Analysis: A Comparison of Source Separation Systems and Conventional Treatment Systems

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Abstract:

Exergy analysis and material balances are useful to describe resource use in different systems. In this study, three different sewerage systems are analyzed: a conventional system with biological nitrogen removal, a conventional system in combination with source separation of urine, and a treatment system with source separation of urine and feces. The influence of factors such as the size of the system, access to farmland, and concentration of collected urine is studied. The study shows that total exergy consumption is least for the system with source separation of urine and feces and greatest for the conventional wastewater treatment system. The primary difference results from the amount of methane gas that is produced by each alternative. Another conclusion is that a significant portion of exergy consumption in the source separation system is the transport and spreading of urine.

Keywords: EXERGY ANALYSIS; NITROGEN; PHOSPHORUS; SOURCE SEPARATION; URINE

Document Type: Research Article

DOI: https://doi.org/10.2175/106143096X122302

Publication date: 1999-11-01

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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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