• WASTEWATER TREATMENT AND RESOURCES RECOVERY IN PAPER AND PULP INDUSTRY USING HIGH-RATE DISSOLVED AIR FLOTATION

    Author(s):
    Lawrence K Wang (see profile) , Mu-Hao Sung Wang
    Editor(s):
    Hung-ping Tsao
    Date:
    2022
    Group(s):
    Environmental Humanities, Science, Technology, Engineering, Arts and Mathematics (STEAM), Science, Technology, Engineering and Mathematics
    Subject(s):
    Research
    Item Type:
    Book chapter
    Tag(s):
    resources recovery, paper and pulp industry, dissolved air flotation, lenox institute of water technology, krofta engineering corporation, Innovation
    Permanent URL:
    https://doi.org/10.17613/zq0g-t311
    Abstract:
    There are 1000+ Spracell DAF installations around the world. The senior author was a UNIDO Senior Advisor responsible for introducing Spracell DAF and other US technologies to the developing countries. The advantages of Spracell DAF over conventional technologies are: (a) its low retention time is about 3 minutes; (b) its high specific clarification capacity is 4-5 GPM/sqft requiring very small surface area; (c) its capital & O&M costs are lower than any other systems of comparable performance; (d) its installation is simple; (e) it maintains its value because its relocation can be easily accomplished; (f) its space requirements are minimal because of its low headroom; (g) it can be erected above ground level to save land space; (h) it is easy to clean because the DAF tank is completely open; (i) its clarification efficiency is high: DAF effluent TSS is in the range of 20 to 30 mg/L and its thickened sludge consistency is 2 to 3%; (j) small Supracell DAF is delivered fully prefabricated; larger units are delivered in parts which flange together; and (k) no heavy foundation or support structure is needed as the total load factor when filed with water weights less than 150 lb/sqft. Supracell DAF can be applied to paper and pulp industry for whitewater clarification, secondary fiber recovery, titanium dioxide recovery, WWTP secondary clarification, lagoon algae separation and sludge concentration. This paper introduces DAF history, applications, process equipment, components, flow diagrams, operations, advantages, advances, and case histories. This publication is one of many memoirs written to document the accomplishments of LIWT-KEC in memory of late Dr. Milos Krofta and all deceased Lenox professors.
    Notes:
    KEYWORDS: Memoir, Lenox Institute of Water Technology, Krofta Engineering Corporation, Innovation, Circular Supracell, Dissolved Air Flotation (DAF), Paper Industry, Pulp Industry, Forest Industry, White Water, DAF Design, Secondary Fiber, Titanium Dioxide, Sludge, Secondary Fiber, Secondary Flotation Clarification, Lagoon Algae Separation, Sludge Bulking.
    Metadata:
    Published as:
    Book chapter    
    Status:
    Published
    Last Updated:
    5 months ago
    License:
    All Rights Reserved
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