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Study of Using Microfiltration and Reverse Osmosis Membrane Technologies for Reclaiming Cooling Water in the Power Industry

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A study of using dual membrane technologies, microfiltration (MF) and reverse osmosis (RO), for reclaiming blowdown of the cooling tower was conducted at ZJK power plant, Hebei province, China. The study shows that the combined MF-RO system can effectively reduce water consumption in the power industry.

The results indicate that MF process is capable of producing a filtrate suitable for RO treatment and achieving a silt density index (SDI) less than 2, turbidity of 0.2 NTU. The water quality of RO effluent is very good with an average conductivity of about 40 μs/cm and rejection of 98%. The product water is suitable for injection into the cooling tower to counteract with cooling water intrusion.

After adopting this system, water-saving effectiveness as expressed in terms of cycles of concentration could be increased from 2.5–2.8 times to 5 times.

Keywords: Microfiltration; Reverse Osmosis; circulation cooling water; coagulation; reclamation; scaling tendency; transmembrane pressure

Document Type: Research Article


Publication date: July 1, 2007

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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