Treatment of wastewater solutions from anodizing industry by membrane distillation and membrane crystallization

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The treatment of wastewater containing various metal ions is a challenging issue in the anodizing industry. The current study investigates the application of membrane distillation/crystallization (MD/MCr) for the simultaneous recovery of freshwater and sodium sulfate from wastewater originating from a Danish anodizing industry. MD/MCr experiments were performed on supernatant from wastewater obtained after centrifugation. The effect of various feed temperatures and cross-flow velocities on flux and crystal characteristics was investigated. The crystal growth in the feed tank was monitored through the use of an online PaticleView microscope. The crystals' morphology and form were determined by using scanning electron microscope (SEM) and X-ray powder diffraction (XRD), respectively, while inductively coupled plasma (ICP) was applied to determine the purity of the obtained crystals. The weight and dimensions of the MD/MCr unit that were required to treat the specific amount of wastewater were evaluated as a function of the feed inlet temperature. It was demonstrated that the application of MCr allows extracting high-purity sodium sulfate crystals and more than 80% freshwater from the wastewater.

OriginalsprogEngelsk
Artikelnummer287
TidsskriftApplied Sciences
Vol/bind9
Udgave nummer2
Antal sider15
DOI
StatusUdgivet - 2019

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Anodic oxidation
Crystallization
Distillation
Wastewater
Membranes
Crystals
Industry
Centrifugation
Inductively coupled plasma
Flow velocity
X ray powder diffraction
Metal ions
Microscopes
Electron microscopes
Fluxes
Scanning
Recovery
Temperature
Experiments
sodium sulfate

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title = "Treatment of wastewater solutions from anodizing industry by membrane distillation and membrane crystallization",
abstract = "The treatment of wastewater containing various metal ions is a challenging issue in the anodizing industry. The current study investigates the application of membrane distillation/crystallization (MD/MCr) for the simultaneous recovery of freshwater and sodium sulfate from wastewater originating from a Danish anodizing industry. MD/MCr experiments were performed on supernatant from wastewater obtained after centrifugation. The effect of various feed temperatures and cross-flow velocities on flux and crystal characteristics was investigated. The crystal growth in the feed tank was monitored through the use of an online PaticleView microscope. The crystals' morphology and form were determined by using scanning electron microscope (SEM) and X-ray powder diffraction (XRD), respectively, while inductively coupled plasma (ICP) was applied to determine the purity of the obtained crystals. The weight and dimensions of the MD/MCr unit that were required to treat the specific amount of wastewater were evaluated as a function of the feed inlet temperature. It was demonstrated that the application of MCr allows extracting high-purity sodium sulfate crystals and more than 80{\%} freshwater from the wastewater.",
keywords = "Anodizing industry, Membrane crystallization, Membrane distillation, Mineral recovery, Sodium sulphate",
author = "Aamer Ali and Jacobsen, {Josephine Hvid} and Jensen, {Henriette Casper} and Christensen, {Morten Lykkegaard} and Quist-Jensen, {Cejna Anna}",
year = "2019",
doi = "10.3390/app9020287",
language = "English",
volume = "9",
journal = "Applied Sciences",
issn = "2076-3417",
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AU - Ali, Aamer

AU - Jacobsen, Josephine Hvid

AU - Jensen, Henriette Casper

AU - Christensen, Morten Lykkegaard

AU - Quist-Jensen, Cejna Anna

PY - 2019

Y1 - 2019

N2 - The treatment of wastewater containing various metal ions is a challenging issue in the anodizing industry. The current study investigates the application of membrane distillation/crystallization (MD/MCr) for the simultaneous recovery of freshwater and sodium sulfate from wastewater originating from a Danish anodizing industry. MD/MCr experiments were performed on supernatant from wastewater obtained after centrifugation. The effect of various feed temperatures and cross-flow velocities on flux and crystal characteristics was investigated. The crystal growth in the feed tank was monitored through the use of an online PaticleView microscope. The crystals' morphology and form were determined by using scanning electron microscope (SEM) and X-ray powder diffraction (XRD), respectively, while inductively coupled plasma (ICP) was applied to determine the purity of the obtained crystals. The weight and dimensions of the MD/MCr unit that were required to treat the specific amount of wastewater were evaluated as a function of the feed inlet temperature. It was demonstrated that the application of MCr allows extracting high-purity sodium sulfate crystals and more than 80% freshwater from the wastewater.

AB - The treatment of wastewater containing various metal ions is a challenging issue in the anodizing industry. The current study investigates the application of membrane distillation/crystallization (MD/MCr) for the simultaneous recovery of freshwater and sodium sulfate from wastewater originating from a Danish anodizing industry. MD/MCr experiments were performed on supernatant from wastewater obtained after centrifugation. The effect of various feed temperatures and cross-flow velocities on flux and crystal characteristics was investigated. The crystal growth in the feed tank was monitored through the use of an online PaticleView microscope. The crystals' morphology and form were determined by using scanning electron microscope (SEM) and X-ray powder diffraction (XRD), respectively, while inductively coupled plasma (ICP) was applied to determine the purity of the obtained crystals. The weight and dimensions of the MD/MCr unit that were required to treat the specific amount of wastewater were evaluated as a function of the feed inlet temperature. It was demonstrated that the application of MCr allows extracting high-purity sodium sulfate crystals and more than 80% freshwater from the wastewater.

KW - Anodizing industry

KW - Membrane crystallization

KW - Membrane distillation

KW - Mineral recovery

KW - Sodium sulphate

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U2 - 10.3390/app9020287

DO - 10.3390/app9020287

M3 - Journal article

VL - 9

JO - Applied Sciences

JF - Applied Sciences

SN - 2076-3417

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ER -