Patent ID: 7670486
Filing Date: 2010-03-02
Classification: C02F,Y10S

Abstract:
1. A phosphorus removal system for removing phosphorus from an influent, the system comprising: a first section comprising a tube section, the first section receiving the influent, dividing the influent into a first flow and a sludge, and discharging the first flow; a first coagulant inlet positioned upstream of the first section and in fluid communication with the influent to introduce a first coagulant selected to precipitate phosphorus; a second section comprising an adsorption clarifier, the second section receiving the first flow and discharging a second flow; a third section comprising a media filter, the third section receiving the second flow and discharging an effluent; a second coagulant inlet positioned downstream of the first section and upstream of the third section to introduce a second coagulant selected to precipitate phosphorus; a first return line connecting the sludge to a position upstream of, and in fluid communication with, the first section, wherein a portion of the sludge is pumped via the first return line to a position upstream of the first section, and wherein a portion of the sludge is mixed with the influent; and at least one additional return line connecting a position downstream of the first section, to a position upstream of, and in fluid communication with, the first section, wherein a portion of contaminates from the position downstream of the first section is pumped via the additional return line to a position upstream of the first section, and wherein a portion of the contaminates is mixed with the influent,