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Using Oxidation–Reduction Potential as Septicity Control Parameter During Reclaimed Wastewater Transportation

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Abstract:

During wastewater transportation, chemical and biological transformations may occur. Aerobic, anoxic, and anaerobic conditions exist depending on the presence or absence of dissolved oxygen and oxidized nitrogen compounds. The occurrence of anaerobic conditions has a negative effect on wastewater transportation because of the usual subsequent sulfide generation process. In Tenerife, Spain, reclaimed wastewater used for agricultural purposes is transported via a completely filled gravity pipe, 0.6 m in diameter and 61 km long. Because of the long residence time (approximately 30 to 40 hours), anaerobic conditions typically occur after 5 to 10 hours of flow. Field studies during transportation were conducted from November 1994 to July 1997. This paper describes a study of the evolution of septic conditions (aerobic, anoxic, and anaerobic) and the relationship between septicity and oxidation–reduction potential (ORP), which can predict the occurrence of anaerobic conditions.

Keywords: AEROBIC CONDITIONS; ANAEROBIC CONDITIONS; ANOXIC CONDITIONS; GRAVITY PIPE; OXIDATION– RECLAIMED WASTEWATER; REDUCTION POTENTIAL; REUSE; SEPTICITY; SULFIDE

Document Type: Research Article

DOI: https://doi.org/10.2175/106143000X137996

Publication date: 2000-07-01

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  • 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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