Patent ID: 6036854
Filing Date: 2000-03-14
Classification: C02F

Abstract:
A system for treatment of waste water stream comprising soluble biological contaminants issuing from a primary facility, said system comprising:a waste water filtration unit that divides the waste water stream into a permeate stream and a concentrate stream such that the concentrate stream comprises a concentrated mixture including the soluble biological contaminants and water;a holding vessel in fluid communication with said waste water filtration unit, said holding vessel receiving the concentrate stream from the waste water filtration unit;a stream heating unit in fluid communication with said holding vessel, said stream heating unit increasing the temperature of the concentrate stream exiting said holding vessel;at least one fermentation vessel in fluid communication with said stream heating unit, said at least one fermentation vessel receiving the concentrate stream and a quantity of active yeast;at least one pressure means in fluid communication with said at least one fermentation vessel, said at least one pressure means directing pressurized air into said at least one fermentation vessel; anda second filtration unit in fluid communication with said at least one fermentation vessel, said second filtration unit filtering a yeast mass withdrawn from said at least one fermentation vessel into a water stream and a yeast product stream,whereby the treatment system substantially converts a waste water stream issuing from a primary facility into a relatively clean water stream and a useful yeast product.