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Experimental investigation and techno-economic analysis of tetramethylammonium hydroxide removal from wastewater in nano-electronics manufacturing via membrane distillation
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-3661-7016
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2019 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 579, p. 283-293Article in journal (Refereed) Published
Abstract [en]

In nano-electronics manufacturing, tetramethylammonium hydroxide (TMAH) is extensively used in the photo-lithography and etching processes, leading to a waste disposal issue. The present study focuses on TMAH wastewater treatment in nano-electronics industries by using membrane distillation technology. Actual TMAH wastewater samples were collected at imec, Belgium. An air gap membrane distillation bench unit was employed to perform the experiments for different operating conditions i.e., feed temperatures and flow rates. High quality water is recovered after reducing the TMAH concentration to 1 ppm and lowering the TOC to 0.8 ppm from 8 ppm. For the industrial scale TMAH wastewater treatment, industrial waste heat driven and district heating driven membrane distillation systems are designed and analyzed. It is determined that 14 GWh thermal energy is required annually to treat 20,000 m 3 of TMAH wastewater/year while considering 65 °C as the membrane distillation feed temperature. Expected unit water treatment cost is found as low as 16 $/m 3 of TMAH wastewater, roughly 80% lower than current disposal costs.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 579, p. 283-293
Keywords [en]
Membrane distillation, Techno-economic analysis, Tetramethylammonium hydroxide, Waste heat, Wastewater
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246407DOI: 10.1016/j.memsci.2019.02.067ISI: 000461667700027Scopus ID: 2-s2.0-85062439874OAI: oai:DiVA.org:kth-246407DiVA, id: diva2:1301262
Note

QC 20190401

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-04-09Bibliographically approved

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Noor, Imtisal-e-Martin, Andrew R.

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