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Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor

Author

Listed:
  • Ruizhu Hu

    (Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, China
    Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

  • Tinglin Huang

    (Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, China
    Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

  • Aofan Zhi

    (Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, China
    Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

  • Zhangcheng Tang

    (Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, China
    Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

Abstract

The softening effect of a new type of circulating pellet fluidized bed (CPFB) reactor on groundwater was studied through a full-scale experiment. The operation of the CPFB reactor in the second water plant in Chang’an District in Xi’an China was monitored for one year, and the results were compared with those for the Amsterdam reactor in The Netherlands. The removal efficiency of Ca 2+ in the CPFB reactor reached 90%; the removal rate of total hardness was higher than 60%; effluent pH was 9.5–9.8; the turbidity of the effluent and the turbidity after boiling were lower than 1.0 NTU; the unit cost was less than €0.064 per m 3 ; and the softened effluent was stable. The pellets in the CPFB reactor were circulated, providing higher crystallization efficiency. The diameter of the discharged pellets reached between 3–5 mm, and the fluidized area height of the CPFB reactor was 4 m. The performance parameters of the CFPB reactor were optimized.

Suggested Citation

  • Ruizhu Hu & Tinglin Huang & Aofan Zhi & Zhangcheng Tang, 2018. "Full-Scale Experimental Study of Groundwater Softening in a Circulating Pellet Fluidized Reactor," IJERPH, MDPI, vol. 15(8), pages 1-11, July.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:8:p:1592-:d:160254
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    Cited by:

    1. Ruizhu Hu & Tinglin Huang & Tianwei Wang & Huixin Wang & Xiao Long, 2019. "Application of Chemical Crystallization Circulating Pellet Fluidized Beds for Softening and Saving Circulating Water in Thermal Power Plants," IJERPH, MDPI, vol. 16(22), pages 1-12, November.

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