The quantity of the discharged water is large, approximately 10000 m3/d.
If the (unmentioned) discharge temperature is high yet cannot be used for other industrial processes the water could provide factory or local residential (or greenhouse?) heating - plenty of this needed in Shaanxi's winters - or, via an absorption cooling system, harnessed for air conditioning.
You have probably already considered outdoor holding tank(s) but 10,000m³ daily is a LOT of water. Ambient cooling would be enhanced, especially on dry days, by evaporative chilling if the tank water is sprayed into the air.
China (and much of the world) desperately needs to improve the stewardship of its water resources. I hope you have access to alarming articles such as http://www.nytimes.com/2016/04/12/world/asia/china-underground-water-pollution.html and wish you success in your endeavour.
P.S. If you would like to consult an American engineer, far more qualified than I am, who has worked in that part of the world, please let me know.
Better, if you could mention the temperature and type of wastewater (contaminants/pollutants) so that to employ a proper treatment process. Membrane Distillation (MD) is an emerging desalination/wastewater treatment process, not yet commercialized but many researchers/startups are working on this topic. MD is a membrane based separation process operates at low temperature (40-80 degree C) and at atmospheric pressure, where you can achieve theoretically 100% rejection of non-volatile pollutants/salts/contaminants and you can get ultra pure water from your hot waste water. You can see a lot of my publications in this regards.
Cheers
Lijo
Lijo, you are quite right to wonder about what Wang's water contains apart from heat. MD sounds like a terrific idea especially since it is evidently far less energy-intensive than standard reverse osmosis.
The water has been desalinated using a 1 stage RO process. The effluent temperature is approximately 20 degree C.
Thanks Antonio...
@Wendong: The product you are getting after a two-stage RO process must be already potable and I believe that you don't need any post treatment in order to adjust the temperature.
Cheers
Dear Wendong Wang
I think , designing an equalization tank based on commutative hourly flow rate of the water production, can be a low-cost way to adjust the water temperature discharged from a factory as close as to the tempterature of the recieving water body.
bye
Thanks for all of your suggestions. I am planning to adjust the treated effluent temperature by designing an adjusting pond used as a landscape as its high water quality before it was discharged into the receiving water body.
Dear Wendong, I would very much agree with Lijo, if the water is already through a 2 stage RO process, it should be fit for use either as potable, or as swimming pool water. If you are already fostering the 2 step RO process, I wonder why you do not apply heat exchangers and use the heat for something.... if nothing else then district heating or greehouses as discussed above.
That's a very good idea! Heat exchanging would be considered in the treatment process upgrading. I made a mistake before. The effluent was treated with 1 stage RO not two stage RO.
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