Membrane and Water Treatment

  • 제8권2호
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  • Pages.125-136
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  • 2017
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Carbonate scale reduction in reverse osmosis membrane by CO2 in wastewater reclamation

  • 투고 : 2016.08.05
  • 심사 : 2016.10.12
  • 발행 : 2017.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Reverse osmosis technology is being used on large scale for treatment of ground water, brackish water, wastewater and sea water. The most challenging issue in RO process is carbonate scaling which is directly linked with the efficiency and economy. Considering the natural phenomena of carbonate scaling different adaptations have been made to control scaling on the surface of RO membrane including acid dosage and antiscalant addition. As carbonate scaling is directly related with pH level of feed water, present study describes an experimental approach to reduce scaling on RO membrane by lowering the feed water pH by purging $CO_2$. In this comparative study four different conditions including control process (without any scale inhibitor), with dosage of antiscalant, with purging of $CO_2$ and with co addition of antiscalant and $CO_2$ in a feed stream line; it was established that $CO_2$ is a better appliance to reduce carbonate scaling on the membrane surface by reduce pH of feed stream. It was also observed that $CO_2$ and antiscalant mutually function better for scale control.

키워드

과제정보

연구 과제 주관 기관 : MOTIE (Ministry of Trade, Industry and Energy)

참고문헌

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  4. Sustainable Membrane-Based Wastewater Reclamation Employing CO2 to Impede an Ionic Precipitation and Consequent Scale Progression onto the Membrane Surfaces vol.11, pp.9, 2017, https://doi.org/10.3390/membranes11090688