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https://scholarbank.nus.edu.sg/handle/10635/237668
DC Field | Value | |
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dc.title | COMPARISON OF PRE-TREATMENT TECHNOLOGIES FOR ZERO-LIQUID DISCHARGE APPLICATIONS | |
dc.contributor.author | JONATHAN LEE ZHIQIANG | |
dc.date.accessioned | 2023-02-28T18:00:49Z | |
dc.date.available | 2023-02-28T18:00:49Z | |
dc.date.issued | 2022-08-04 | |
dc.identifier.citation | JONATHAN LEE ZHIQIANG (2022-08-04). COMPARISON OF PRE-TREATMENT TECHNOLOGIES FOR ZERO-LIQUID DISCHARGE APPLICATIONS. ScholarBank@NUS Repository. | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/237668 | |
dc.description.abstract | RO brine pre-treatment by membrane-based Zero Liquid Discharge (mZLD) was presented as a critical unit process to reclaim the growing quantities of waste RO brine from desalination and water reuse. This thesis compared precipitative softening (PS) and electrocoagulation (EC) pre-treatment for synthetic and augmented industrial RO brines at the bench-scale. In Phase 1, 2-level partial factorial experiments were conducted to study the effect of process operating variables on specific foulant removals. Phase 2 evaluated additional response factors as a function of the Phase 1 operating variables. Finally, response surface methodology aided in elucidating optimal PS and EC operating conditions for mZLD applications. The experimentally verified optimal operating parameters yielded effluents with LSI less than -0.5 using either treatment. However, effluent supernatant turbidity (PS: 47.8; EC: 3.7 NTU) and dissolved aluminium residual (EC: 1.45 ppm) were higher than accepted RO influent quality guidelines. DOC removals ranged from 14.9 – 28.5%. | |
dc.language.iso | en | |
dc.subject | Industrial Wastewater, RO Brine, Zero Liquid Discharge, Pre-treatment, Design of Experiments, Response Surface Methodology | |
dc.type | Thesis | |
dc.contributor.department | CIVIL & ENVIRONMENTAL ENGINEERING | |
dc.contributor.supervisor | How Yong Ng | |
dc.description.degree | Master's | |
dc.description.degreeconferred | MASTER OF ENGINEERING (CDE) | |
dc.identifier.orcid | 0000-0001-6789-8132 | |
Appears in Collections: | Master's Theses (Open) |
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LeeJLZ.pdf | 3.32 MB | Adobe PDF | OPEN | None | View/Download |
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