Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1992-11-16
1994-12-20
Upton, Christopher
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210708, 210725, 210728, 210752, 210199, 210202, 2102212, C02F 152
Patent
active
053743580
ABSTRACT:
The invention pertains to the purification of commercial, industrial and institutional waste streams in order to bring them into dischargeable compliance with environmental standards. The invention provides a system for removing contaminants, such as fats, oils and grease (FOGs) and total petroleum hydrocarbons (TPHs), from waste effluents on an essentially continuous basis. During the treatment process, the FOGs and TPHs disposed within the textiles to be cleaned are treated with an alkaline, pH- or acid-sensitive detergent, causing their emulsification. The effluent waste stream is then treated by removing the solids and particulates. The alkaline emulsion is broken up by acidification of the wastewater, thereby releasing and dispersing the FOGs and TPHs. The FOGs and TPHs in the broken-up and dissolved emulsion are agglomerated by the introduction of an organic, cationic polymer. The waste stream is then fed to a separation station, where the oils are adsorbed on an appropriate surface, such as a plate or lipophilic media pack. The oil molecules form droplets that rise to the surface and are siphoned off and/or pumped away. The wastewater is then dischargeable to the Public Owned Treatment Works (POTW) after a final pH adjustment that conforms the waste effluent to environmental regulation standards.
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Diamond Harold
Kaniecki Thaddeus J.
Rotter Larry
Vermes Rudolph N.
Diamond Chemical Company, Inc.
Upton Christopher
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