09 wastewater treatment
TRANSCRIPT
High recovery in reverse osmosisS. Salvador Cob, C. Beaupin, B. Hofs, D.J.H. Harmsen, E.R.
Cornelissen,
M.M. Nederlof, A. Zwijnenburg, F.E. Genceli Güner, G.J. Witkamp
29-05-2012
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BACKGROUND
• Membrane technology Concentrate stream?
• High recovery: more production less waste
waste treatment
• Towards Zero Liquid Discharge
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OBJECTIVES
• Study the feasibility of ZLD in the system:
- filtration over 1 μm
- cation exchange (CIEX)
- nanofiltration (NF)
- reverse osmosis (RO)
membranes: NF2540, TW30
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PILOT PLANT
RO NF
CIEX
MainPump
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98%
98%94%
91%
94%
96% 98%
94%
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RESULTS
• Silica and/or aluminosilicate scaling are limiting the recovery
• The limiting recovery in our system is about 94%
• Silica must be removed or kept in solution to achieve the ZLD concept
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CURRENT RESEARCH
• Addition of antiscalants
• Removal of silica in a separate process
• Concentrate treatment
• CIEX regenerate treatment
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THANKS FOR YOUR ATTENTION!!!