Patent ID: 6207047
Filing Date: 2001-03-27
Classification: C02F,Y02W

Abstract:
A wastewater treatment system comprising:(a) a wastewater inlet;(b) a connecting means comprising:(i) a primary treatment tank connected to said wastewater inlet and being adapted to receive a volume of wastewater, said wastewater inlet defining the top surface of the full capacity volume; and(ii) a biofiltration tank containing controlled porous media inoculated with nitrifying aerobic bacteria;(c) a primary pump which directs effluent from said primary treatment tank to said biofiltration tank, said primary pump being adapted to activate when the volume in said primary treatment tank exceeds an activation capacity, and said primary pump being further adapted to deactivate when the volume in said primary treatment tank falls below a deactivation capacity, said activation capacity volume being greater than or equal to said deactivation capacity volume and less than said full capacity volume;(d) a bioreactor, comprising:(i) a substantially water-tight compartment;(ii) a bioreactor inlet fluidly connected to said connecting means, said connecting means being fluidly connected to said wastewater inlet;(iii) a bioreactor outlet;(iv) controlled porous media inoculated with bacteria effective to reduce CBOD and nitrogen, wherein said controlled porous media are contained inside said substantially water-tight compartment; and(vii) said bioreactor inlet and said bioreactor outlet being adapted to prevent said controlled porous media from passing out of said substantially water-tight compartment; and(e) a secondary pump adapted to direct effluent from said biofiltration tank to said bioreactor inlet.