• INSTITUTIONAL WASTEWATER TREATMENT BY A SEPTIC TANK, FLOTATION, FILTRATION AND DRAINFIELD SYSTEM

    Author(s):
    Helena Sheetikoff, 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):
    Septic tanks--Maintenance and repair, Water--Purification--Dissolved air flotation--Testing, Filters and filtration, Soils--Leaching, Groundwater, Sewage disposal plants, Technological innovations, Massachusetts--Lenox, United States, Biography
    Item Type:
    Book chapter
    Tag(s):
    dedication, Milos Krofta, lenox institute of water technology, Hillcrest Educational Center
    Permanent URL:
    https://doi.org/10.17613/vdbk-3r92
    Abstract:
    The feasibility of treating the Hillcrest Educational Center (HEC) wastewater by a WWT system consisting of septic tank, dissolved air flotation-filtration (DAFF) and leaching field has been studied in three parts: (a) Technically the DAFF treats the HEC septic tank effluent well and removes 91-94% TSS, 40-76% COD, 60-65% BOD, 56-98% P, 84-91% odor, 74-91% color, 48-61% turbidity and 81-92% iron, from the septic tank effluent. DAFF effluent discharges to a leaching field for final polishing and disposal, so the groundwater source at HEC sit is protected; (b) Economically the innovative WWT system costs in the short term run are increased due to routine electricity consumption, sludge pumping from septic tank, chemical addition and O&M, compared to the low costs of a conventional septic tank-leaching field system. In a long term run the costs of the innovative WWT system installed are reduced compared to the conventional septic tank-leaching field system. The costs of conventional systems are extremely high when the leaching field is plugged and has to be replaced, and/or when the groundwater supply sources are contaminated, and has to be remediated or fined. So the innovative WWT system is cost-effective in a long term run; (c) Mechanically the moving parts, switches, pumps and electrical devices of DAFF clarifier require routine O&M to prevent any operational failure. The new Septic tank-DAFF-leaching field system is reliable, and good for decentralized waste treatment in rural area. A licensed operator is needed for the institutional WWTP operation.
    Notes:
    KEYWORDS: Institutional Wastewater Treatment, Rural Wastewater Treatment, Decentralized Waste Treatment, Septic Tank, Dissolved Air Flotation, Sand Filtration, DAFF, Drainfield, Leaching Field, Groundwater Protection, Combined Physicochemical And Biological Treatment, Massachusetts, USA, Lenox Institute of Water Technology
    Metadata:
    Published as:
    Book chapter    
    Status:
    Published
    Last Updated:
    4 months ago
    License:
    All Rights Reserved
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