09 wastewater treatment

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!!!