Treatment of Wastewater Solutions from Anodizing Industry by Membrane Distillation and Membrane Crystallization

Ali, Aamer; Jacobsen, Josephine Hvid; Jensen, Henriette Stokbro; Christensen, Morten Lykkegaard; Quist-Jensen, Cejna Anna

doi:10.3390/app9020287

Cited by 17 publications

(2 citation statements)

References 22 publications

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“…For instance, it was found that commercial membranes could reduce conductivity in the anodising baths significantly [32]. Accordingly, the application of the membrane crystallisation technique to wastewaters discharged from an anodising industry in Denmark provided more than 80% fresh water from the wastewater [33].…”

Section: Resultsmentioning

confidence: 99%

Characterisation of aluminium industrial wastewater and investigation of recovery alternatives

KAYA>

Güneş

Aydın

2022

Environmental Research and Technology

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In aluminium processing and coating plants, different pollution profiles occur in different units within the process. In the enamel coating part, wastewater with a more intense pollution load occurs. There is less intense pollution of wastewater in washing units. More acidic water comes out from the anodised coating units, and the waters used for washing and shaping in the units where steel bonding takes place are more oily and have high chemical oxygen demand. All these waters are combined as a result of production and discharged to the wastewater treatment plant. In this study, the characterisation of wastewater originating from the two aluminium coating plants and its reusability in the process after being treated in the current treatment plant was carried out. In addition, advanced treatment methods were applied in these two aluminium plants to evaluate the reusability of the treated water. For this, the removal and reusability of pollution parameters were investigated.

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Section: Resultsmentioning

confidence: 99%

Characterisation of aluminium industrial wastewater and investigation of recovery alternatives

KAYA>

Güneş

Aydın

2022

Environmental Research and Technology

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“…Additionally, the MD is well suited for the treatment of industrial wastewater [ 18 , 19 ]. Importantly, this technology relies on its capability to treat harmful industrial wastewaters and waste recycling through the recovery of valuable constituents from feed streams [ 20 , 21 , 22 ]. Furthermore, MD is characterized by high permeate quality, simple operation configuration and process conditions, such as temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle-Enhanced PVDF Flat-Sheet Membranes for Seawater Desalination in Direct Contact Membrane Distillation

et al. 2023

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In this study, hydrophobic functionalized carbon nanotubes (fCNTs) and silica nanoparticles (fSiO2NPs) were incorporated into polyvinylidene fluoride (PVDF) flat-sheet membranes to improve their performance in membrane distillation (MD). The performance of the as-synthesized membranes was evaluated against commercial reference polytetrafluoroethylene (PTFE) flat-sheet membranes. The water contact angle (WCA) and liquid entry pressure (LEP) of the PVDF membrane were compromised after incorporation of hydrophilic pore forming polyvinylpyrrolidone (PVP). These parameters were key in ensuring high salt rejections in MD processes. Upon incorporation of fCNTS and fSiO2NPs, WCA and LEP improved to 103.61° and 590 kPa, respectively. Moreover, the NP additives enhanced membrane surface roughness. Thus, an increase in membrane roughness improved WCA and resistance to membrane wetting. High salt rejection (>99%) and stable fluxes (39.77 kg m−2 h−1) were recorded throughout a 3 h process evaluation where 3.5 wt% NaCl solution was used as feed. These findings were recorded at feed temperature of 60 ℃. Evidently, this study substantiated the necessity of high feed temperatures towards high rates of water recovery.

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Performances of PTFE and PVDF membranes in achieving the discharge limit of mixed anodic oxidation coating wastewaters treated by membrane distillation

Turk,

Zoungrana,

Cakmakci

2024

Environ Sci Pollut Res

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The mixed wastewater generated by anodic oxidation coating facilities contains high levels of various contaminants, including iron, aluminum, conductivity, chemical oxygen demand (COD), and sulfate. In this study, the effectiveness of the membrane distillation (MD) process using polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) membranes was investigated to treat mixed wastewater from an anodized coating factory. The results indicate that both hydrophobic membranes effectively removed targeted contaminants. However, the PTFE membrane achieved higher removal efficiencies, with over 99% removal of sulfate, conductivity, iron, and aluminum, 85.7% of COD, and 86% of total organic carbon (TOC). In contrast, the PVDF membrane exhibited a significant decline in removal efficiency as the temperature increased and performed well only at lower feed temperatures. The PTFE membranes outperformed the PVDF membranes in treating chemically intensive anodic oxidation wastewaters. This superiority can be attributed to the PTFE membrane's morphology and structure, which are less influenced by feed water temperature and chemicals. Additionally, its slippery surface imparts anti-adhesion properties, effectively preventing membrane fouling, and maintaining the treated water quality and flux for longer operation time.

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Treatment of Wastewater Solutions from Anodizing Industry by Membrane Distillation and Membrane Crystallization

Cited by 17 publications

References 22 publications

Characterisation of aluminium industrial wastewater and investigation of recovery alternatives

Characterisation of aluminium industrial wastewater and investigation of recovery alternatives

Nanoparticle-Enhanced PVDF Flat-Sheet Membranes for Seawater Desalination in Direct Contact Membrane Distillation

Performances of PTFE and PVDF membranes in achieving the discharge limit of mixed anodic oxidation coating wastewaters treated by membrane distillation

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