Experimental Study on the Application of Humidification-Dehumidification Technology in the Desalination of High- Salt Industrial Wastewater
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1.School of Environment and Science Engineering, Tongji University, Shanghai 200092,China;2.Tongji University Architectural Design and Research Institute (Group) Co. Ltd., Shanghai 200092,China;3.Shanghai Institute of Pollution Control and Ecological Safety, Shanghai 200092, China

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X703.1

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    Abstract:

    Thirty-four different water samples of high-salt industrial wastewater were desalinated by humidification-dehumidification and evaporation experiments. Based on the experimental results, the feasibility study of the universal application of the humidification-dehumidification technology in actual industry is conducted. Combining with the water quality characteristics and treatment effects of different high-salt industrial wastewater, the general rule for judging the effect of this method on the treatment of high-salt industrial wastewater is summarized. The results show that the conductivity drop percentage ησ of the condensate of all wastewater in the experiment is above 80.0%, with the highest percentage of up to 99.9%. All the salinity of the condensate can reach the biochemical treatment standard, and the electrical conductivity of 32 condensates can be reduced to below 2 000 μS?cm-1. In addition, via the humidification-dehumidification technology, salt substances with a higher boiling point than water have a complete removal effect, salt substances with a lower boiling point than water and a larger ionization constant have a better removal effect, and salt substances with a lower boiling point than water and a smaller constants have a poor removal effect.

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WU Zhigen, QIU Lan, ZHU Yuting, WU Shaowen, YU Xingjuan. Experimental Study on the Application of Humidification-Dehumidification Technology in the Desalination of High- Salt Industrial Wastewater[J].同济大学学报(自然科学版),2021,49(10):1435~1442

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History
  • Received:January 05,2021
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  • Online: October 18,2021
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