Patent ID: 7300570
Filing Date: 2007-11-27
Classification: C02F,Y02W,Y10S

Abstract:
1. An apparatus for treating wastewater using a contact medium, comprising: a wastewater collecting tank for collecting the wastewater; a bioflim contact reactor having: a precipitator for receiving the wastewater from the wastewater collection tank and treated wastewater from the collecting hopper, the precipitator being connected to the wastewater collection tank and a nitrogen/phosphorous treatment tank for selectively treating nitrogen and phosphorous, the precipitator including an overflow tank with an overflow wall over which decant water flows, which is connected to the nitrogen/phosphorous treatment tank; and a wastewater circulation unit for recycling decant water collected by the overflow tank from the precipitator and collected from the wastewater collection tank back into the biofilm reactor, wherein each collecting hopper includes: