Water treatment process employing dissolved air flotation to remove suspended solids
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United States of America Patent
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Aug 25, 2020
Grant Date -
Oct 19, 2017
app pub date -
Sep 29, 2015
filing date -
Oct 2, 2014
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Abstract
A water or wastewater treatment process that includes a dissolved air flotation process for removing suspended solids from influent water or mixed liquor. In one process, the dissolved air flotation process is carried out in the absence of adding a coagulant or a flocculant, but yet produces TSS removal efficiencies comparable to those achieved by conventional dissolved air flotation processes that employ a coagulant and a flocculant. In other processes, a coagulant and/or a flocculant is added directly to the mixing zone of a dissolved air flotation system or is added via a pressurized white water injection system. In another process, the use of a coagulant and a flocculant is useful in removing TSS and reducing the concentration of phosphorus in the water being treated.
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