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Study of Using Microfiltration and Reverse Osmosis Membrane Technologies for Reclaiming Cooling Water in the Power Industry
Author(s) -
Li J.,
Xu Z. Y.,
An H. G.,
Liu L. Q.
Publication year - 2007
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143006x95384
Subject(s) - reverse osmosis , cooling tower , microfiltration , turbidity , water cooling , effluent , environmental science , environmental engineering , membrane technology , water treatment , waste management , pulp and paper industry , chemistry , membrane , engineering , mechanical engineering , biochemistry , oceanography , geology
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.