Patent ID: 7422692
Filing Date: 2008-09-09
Classification: C02F,G01N,Y10S

Abstract:
1. A raw influent treatment process eliminating secondary biological treatment comprising: a) adding to raw influent a liquid alum solution in the dosage rates of 250 to 335 milligrams per liter; b) adding to raw influent a liquid alum solution with addition being continuously controlled by continuous in-line pH controller to pH of 5.7 to 6.0; c) adding to raw influent about 0.25 to 3.0 parts per million of an anionic polyelectrolyte polymer to increase settling rate, agglomeration and effectiveness of sedimentation and increase Color, Chemical Oxygen Demand and Total Organic Carbon removal efficiencies producing a supernatant liquid layer from which the color bodies and 95% of organics are removed; d) monitoring and controlling the Color, Chemical Oxygen Demand and Total Organic Carbon removal efficiencies across a clarifier by insertion of continuous in-line Chemical Oxygen Demand analyzer at outlet of a clarifier; e) separating the supernatant liquid layer from which the color bodies and organics have been removed in the clarifier; f) removing the solids from a clarifier underflow stream in the clarifier, dewatering the solids, incinerating the dewatered solids in a bark, oil, gas, or coal power boiler, regenerating of a portion of recovered metal ions from ash and wasting of some of dewatered solids up to approximately 20% to 35% depending on content, percentage, of inert boiler ash in the raw influent; g) passing the supernatant liquid layer onto other final polishing/pH adjustment, if needed, and since Chemical Oxygen Demand, Total Organic Carbon, and Color removal efficiencies are exceedingly high, greater than 95%, no biological treatment is required and secondary biological treatment is eliminated.