• INNOVATIVE PROCESS SYSTEM CONSISTING OF DISSOLVED AIR FLOTATION, RECARBONATION AND FILTRATION, USING LIME AND SODIUM ALUMINATE FOR REMOVAL OF HARDNESS, IRON AND MANGANESE FROM GROUNDWATER

    Author(s):
    Lawrence K Wang (see profile) , Mu-Hao Sung Wang
    Editor(s):
    Hung-ping Tsao
    Date:
    2022
    Group(s):
    Science, Technology, Engineering, Arts and Mathematics (STEAM)
    Subject(s):
    Groundwater, Iron, Manganese, Hardness, Water--Purification--Flocculation, Water--Purification--Dissolved air flotation, Carbon dioxide, Filters and filtration, Lime, Aluminates
    Item Type:
    Book chapter
    Tag(s):
    innovation, lenox institute of water technology, memoir, basic research, call for research
    Permanent URL:
    https://doi.org/10.17613/fpb4-he04
    Abstract:
    Wang, LK, and Wang, MHS (2022). innovative process system consisting of dissolved air flotation, recarbonation and filtration, using lime and sodium aluminate for removal of hardness, iron and manganese from groundwater. In: “Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics (STEAM)”, Wang, LK and Tsao, HP (eds.), 4 (10A), STEAM-VOL4-NUM10A-OCT2022. 34 pages. October 2022, Lenox Institute Press, Massachusetts, USA. .......ABSTRACT: The Lenox Institute of Water Technology (LIWT) has conducted a basic research: (a) a new softening and Fe-Mn removal process system consisting of dissolved air flotation (DAF), recarbonation and filtration has been demonstrated by operating a continuous water treatment plant (WTP); (b) a new chemical combination including lime, sodium aluminate and carbon dioxide has been used successfully for simultaneous removal of Ca-Mg hardness, iron and manganese from groundwater; (c) DAF (3-15 minutes detention time) replaces conventional sedimentation (4-6 hours detention) to become much more cost-effective; (d) DAF-filtration efficiently removes Fe-Mn without an additional oxidation step; (e) sodium aluminate enhances or replaces conventional soda ash for better removal of non-carbonate hardness (NCH) and better removal of manganese after DAF oxidation due to its flocculating nature; (f) the authors call for further basic research regarding the chemistry of Ca-Mg removal by sodium aluminate noting that both calcium aluminate and magnesium aluminate are insoluble substances; (g) further call for research is directed toward simultaneous removal of hardness, Fe-Mn and dissolved organic matter (DOM) by the new process system and new chemical combination; and (h) LIWT new process systems and new chemical combinations can be applied to any manufacturers' DAF, recarbonation and filtration process equipment (Sandfloat, Supracell, AquaDAF, Clari-DAF, etc. )
    Notes:
    KEYWORDS: Softening process innovation, Iron and manganese removal process innovation, flocculation, dissolved air flotation, recarbonation, filtration, chemical treatment innovation, sodium aluminate, lime, carbon dioxide, groundwater treatment, simultaneous hardness, iron and manganese removal, Sandfloat, Supracell, Aqua-DAF, Clari-DAF, Lenox Institute of Water Technology, memoir.
    Metadata:
    Published as:
    Book chapter    
    Status:
    Published
    Last Updated:
    4 months ago
    License:
    All Rights Reserved
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