Patent ID: 9719179
Date: 2017-08-01
CPC Classifications: C02F,C25B

Claim:
1. A system for treating contaminated water to produce at least one of sodium hydroxide, hydrochloric acid, and sodium hypochlorite comprises: a coagulation tank that oxidizes and coagulates effluent from waste water influent; a first pH adjustment tank that adjusts a pH of effluent from the coagulation tank and is downstream of the coagulation tank; a first floc mix tank that adds a first flocculant to effluent from the first pH adjustment tank and is located downstream of the first pH adjustment tank; an iron clarifier that separates iron from effluent from the first floc mix tank and is located downstream of the first floc mix tank; at least one multimedia filter that filters effluent from the iron clarifier and is located downstream of the iron clarifier; a first organics removal system that removes at least petroleum hydrocarbons from effluent from the at least one multimedia filter and is located downstream of the at least one multimedia filter; a second pH adjustment tank that adjusts the pH of effluent from the first organics removal system and is located downstream of the first organics removal system; a softening clarifier that removes calcium carbonate and magnesium hydroxide sludge from effluent from the second pH adjustment tank and is located downstream of the second pH adjustment tank; a third pH adjustment tank that adjusts the pH of effluent from the softening clarifier and is located downstream of the softening clarifier; a filter that removes colloidal solids from effluent from the third pH adjustment tank and is located downstream of the third pH adjustment tank; a second organics removal system that removes at least alcohol and ammonia from effluent from the filter and is located downstream of the first organics removal system; an evaporative brine concentrator that concentrates effluent from the second organics removal system, wherein effluent from the evaporative brine concentrator is a concentrated purified brine and is located downstream of the second organics removal system; a weak acid cation ion exchange column and a first chelating ion exchange column that removes any remaining calcium and remaining magnesium to a level of less than 50 ppb from effluent from the evaporative brine concentrator and is located downstream of the evaporative brine concentrator; a reduction tank that depresses the pH and reduces bromate and iodate in effluent from the first chelating ion exchange column and is located downstream of the weak acid cation exchange column; a third organics removal system that removes at least organic acid from effluent from the reduction tank and is located downstream of the reduction tank; a fourth pH adjustment tank that adjusts the pH of effluent from the third organics removal system and is located downstream of the third organics removal system; a second chelating ion exchange column that removes trace metals from effluent from the fourth pH adjustment tank and is located downstream of the fourth pH adjustment tank; a fifth pH adjustment tank that adjusts the pH of effluent from the second chelating ion exchange column and is located downstream of the second chelating ion exchange column; a bromine oxidation tank that removes bromine and iodine from effluent from the fifth pH adjustment tank and is located downstream of the fifth pH adjustment tank; a sixth pH adjustment tank that adjusts the pH of effluent from the second chelating ion exchange column and is located downstream of the bromine oxidation tank; and at least one electrolysis unit that converts the concentrated purified brine into at least one of sodium hydroxide, hydrochloric acid, and sodium hypochlorite and is located downstream of the sixth pH adjustment tank.