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Wastewater reclamation for potable reuse volume 2: Integration of MBR technology with advanced treatment processes
Expanded Title:Background and Motivation There are a range of technologies and combinations of treatment technologies that can be used to reclaim water from domestic wastewater effluent. The choice of treatment train that will meet quality, cost and operational requirements is thus a difficult one. The intention of this research project is to test a range of treatment technologies in different combinations and to establish a preferred reclamation treatment process train for water reclamation. The product water quality derived from the reclamation process should meet both South African and international drinking water standards. Water reclamation is being considered as an option to meet growing water supply demands. Although indirect potable reuse (IPR) projects are widespread, direct potable reuse (DPR) is still only practiced in two places in Southern Africa. It is envisaged that the results from this study will provide evidence and affirmation that the highest quality drinking water can be produced regardless of the quality of the source water. Objective The objective of this research project was to consistently produce acceptable potable drinking water through wastewater reclamation. The project is divided into two phases as follows: - Phase 1: Bench-scale evaluation of advanced water treatment technologies for the production of potable water using membrane bioreactor technology as pre-treatment and in combination with the following technologies: ozone (O3), granular activated carbon (GAC), nanofiltration (NF) / reverse osmosis (RO), and advanced oxidation (hydrogen peroxide & ultra-violet (UV) radiation). - Phase 2: Recommend a wastewater reclamation treatment train for the design of a full scale reclamation plant and provide a capital and operating cost estimate. Methodology In previous work, (Volume 1: Evaluation of membrane bioreactor technology for pre-treatment), an assessment of MBR technologies as a pre-treatment step in wastewater reclamation was conducted. The Toray MBR demonstration plant proved to be the most reliable and easy to operate of the pilot plants evaluated and was therefore selected to be used for pre-treatment for all the water reclamation plant pilot trials carried out in this project. Bench-scale advanced water treatment unit processes were set up adjacent to the MBR pilot plant facility, and permeate from the facility was used to supply these unit processes with a constant feed.
Date Published:01/07/2014
Document Type:Research Report
Document Subjects:Wastewater Management - Sewers, Mine water - Impact prediction, R & D - Information technology
Document Keywords:Technology, Water Quality
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 611/14
ISBN No:978-1-4312-0566-0
Authors:Metcalf G; Pillay L; Murutu C; Chiburi S; Gumede N; Gaydon PN
Project No:K5/1894
Originator:WRC
Organizations:Umgeni Water; Durban University of Technology; University of Stellenbosch; Royal Haskoning DHV
Document Size:2 407 KB
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