Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1993-10-22
1995-09-26
Lithgow, Thomas M.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
210697, 210705, 210718, 210722, 210727, 210730, 210199, 210202, 2102212, 210295, C02F 124, C02F 154, C02F 164
Patent
active
054532035
ABSTRACT:
Disclosed is a process and apparatus for purifying a low polluted water containing concurrently or selectively inadequate matters including heavy metals such as iron contents and manganese, and fine suspended matters, which comprises adding a reactant primarily containing a colloidal silica from a reactant charger to the polluted water stored in a primary tank to emulsify the inadequate matters; adding a coagulant primarily containing chitosan into the polluted water from a coagulant charger; feeding external air under high pressure by a pump into the polluted water, and separating the air from the polluted water, followed by dissolution of the air under pressure in the polluted water using a water separator; injecting the thus treated polluted water into a polluted water stored preliminarily in a secondary tank to generate very fine bubbles in polluted water stored in the secondary tank under releasing of the pressure; allowing the inadequate matters emulsified and flocculated to float up onto the water surface together with the very fine bubbles and removing them; and discharging the thus purified water obtained after removal of the inadequate matters.
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Lithgow Thomas M.
Tokai Kosan Co., Ltd.
Toyo Dynam Co. Ltd.
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