Demonstration of membrane distillation on textile waste water assessment of long term performance, membrane cleaning and waste heat integration

Dow, Noel, Villalobos García, Jesus, Niadoo, Leslie, Milne, Nicholas, Zhang, Jianhua, Gray, Stephen and Duke, Mikel 2017, Demonstration of membrane distillation on textile waste water assessment of long term performance, membrane cleaning and waste heat integration, Environmental science: water research and technology, vol. 3, no. 3, pp. 433-449, doi: 10.1039/c6ew00290k.

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Title Demonstration of membrane distillation on textile waste water assessment of long term performance, membrane cleaning and waste heat integration
Author(s) Dow, Noel
Villalobos García, Jesus
Niadoo, Leslie
Milne, NicholasORCID iD for Milne, Nicholas orcid.org/0000-0002-3047-080X
Zhang, Jianhua
Gray, Stephen
Duke, Mikel
Journal name Environmental science: water research and technology
Volume number 3
Issue number 3
Start page 433
End page 449
Total pages 17
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2017
ISSN 2053-1400
2053-1419
Keyword(s) Science & Technology
Technology
Life Sciences & Biomedicine
Physical Sciences
Engineering, Environmental
Environmental Sciences
Water Resources
Engineering
Environmental Sciences & Ecology
SURFACE-ACTIVE AGENTS
OSMOTIC DISTILLATION
PTFE MEMBRANES
PVDF MEMBRANE
WET-OUT
DYE
PHOTOCATALYSIS
REMOVAL
REUSE
INDUSTRY
Summary © 2017 The Royal Society of Chemistry. This work reports outcomes of a pilot trial and practical assessment of direct contact membrane distillation (DCMD) towards achieving zero liquid discharge at a textile manufacturing plant. Treatment of textile wastewater is difficult due primarily to the complexity of textile processing and the wastewater produced. Combined effluent from the site, either untreated or treated with the site's existing flocculation and biological processes, were considered as the feeds to the MD testing. Initial bench scale studies found rapid membrane wetting appeared to be avoided by the novel use of foam fractionation on the untreated effluent, or by using the conventionally treated effluent. The trial was conducted on treated effluent using fractionation on a side stream within the MD process, and no wetting was observed over the entire 3 month trial duration. The flux of the 6.4 m2 membrane module started at 5 L m-2 h-1 and declined to 2 L m-2 h-1 after more than 65 days. Caustic cleaning effectively restored flux to 4 L m-2 h-1. A 41-fold increase in feed concentration was verified by sulphate measurements, increasing from 567 mg L-1 to 23 000 mg L-1. After concentrating in the hot cycle, all ammonia entering the DCMD plant from the feedwater was found to evolve into the permeate, but non-volatile sulphate rejection was >99.9%. Water recovery at the end of the trial was 91.6%. A plant integration assessment found that zero liquid discharge would be feasible if saline waste streams were isolated and reverse osmosis processes were coupled with MD harnessing waste heat. MD application to current and future treatment scenarios with waste heat integration to textile processing appears viable.
Language eng
DOI 10.1039/c6ew00290k
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2017, The Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30122456

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