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Cost Effective Solution of Waste Water Reuse and ZLD in CTX with Reference in China

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Cost Effective Solution of Waste Water Reuse and ZLD in CTX with Reference in China

Previously published as part of The International Desalination Association (IDA) World Congress Proceedings, Tianjin-China 2013

Abstract: The use of Coal to produce Gas, Chemical and Liquid (CTX) is a hot topic for China in order to balance their energy import from overseas. Waste water treatment and reuse have become critical issues, because of high TDS and high COD content in the waste water produced. At the same time the huge water consumption required in the process will require this industry to maximize water reuse. In some areas ZLD is even becoming compulsory.

This paper presents an industrial project where the reuse + ZLD system was provided to reclaim 91% of the feed water, leaving only 9 m³/h of heavy polluted brine being discharged to a solar pond.

We will look into the technical challenges faced and how they were handled using proven technologies in innovative ways. Economical parameters are also reviewed to show cost effectiveness from CAPEX and OPEX. In the end of the paper we will have a review, how the CTX ZLD system can be made more reliable and more cost effective.

For more information please refer to the International Desalination Association website.