Managing the reverse osmosis concentrate from the Western Corridor Recycled Water Scheme

Solley, David and Gronow, Claire and Tait, Stephan ORCID: https://orcid.org/0000-0002-0816-8911 and Bates, Jon and Buchanan, Alison (2010) Managing the reverse osmosis concentrate from the Western Corridor Recycled Water Scheme. Water Practice and Technology, 5 (1). pp. 1-9.

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Abstract

The Western Corridor Recycled Water Scheme consists of three advanced water treatment plants (AWTPs), with the combined capacity to recycle 232 ML/d. Each AWTP process consists of pre-treatment, microfiltration (MF), reverse osmosis (RO), UV/peroxide advanced oxidation and chlorination. A key objective of the project is to improve the environmental health of regional waterways, particularly in relation to nutrient discharges. Reverse osmosis processes produce a concentrate stream (ROC), which is the main reject stream of the AWTPs. Options for management of ROC were assessed, and ultimate disposal to nearby waterways was the only feasible option identified. ROC flows for the scheme total 41 ML/d at full capacity, divided between the three AWTPs. The contaminants in this stream are generally 6 to 7 times more concentrated than in the feed water. Environmental risks were identified due to potential increased toxicity associated with these higher concentrations, which were exacerbated due to chlorine and ammonia dosed in the AWTP process. Target ROC contaminants have been identified as nitrogen, phosphorus, ammonia, metals and chlorine. The paper presents the selected toxicity management and nutrient reduction strategies for each AWTP, and the results of full-scale operation to date are also summarised.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 22 Feb 2022 02:54
Last Modified: 22 Feb 2022 02:54
Uncontrolled Keywords: Membrane, nutrient reduction, recycling, reuse, reverse osmosis concentrate, toxicity
Fields of Research (2008): 09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400410 Wastewater treatment processes
40 ENGINEERING > 4004 Chemical engineering > 400411 Water treatment processes
Identification Number or DOI: https://doi.org/10.2166/wpt.2010.018
URI: http://eprints.usq.edu.au/id/eprint/46149

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