Method of removing phosphorus from wastewater

Details Method of removing phosphorus from wastewater Method of removing phosphorus from wastewater

2007-11-13

2007-11-13

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S688000, C210S670000, C210S906000, C210S912000

Reexamination Certificate

active

11124638

ABSTRACT:
A method of and system for removing phosphorus from wastewater using a waste sludge that has a high affinity for phosphorus. So the waste sludge can be used in a flow-through contact reactor to remove the phosphorus from a wastewater stream, the waste sludge is pelletized. The waste sludge pellets are packed into one or more flow-through contact reactors. In the configuration described herein, phosphorus removal is maximized by flowing the wastewater through the reactor(s) in a “pulsed” manner, rather than continuously. Thus, wastewater is flowed through the reactor(s) for a period of time and stopped for a period of time. By giving the sludge absorbent a rest period, the absorption capacity of the sludge is increased significantly, thus decreasing the frequency of regeneration or replacement of the sludge. Sludge regeneration can be accomplished with a stripping step using an alkaline solution of pH 13, followed by rinsing with water.

REFERENCES:
patent: 4079003 (1978-03-01), Manchak
patent: 4826601 (1989-05-01), Spratt et al.
patent: 4948510 (1990-08-01), Todd et al.
patent: 5093007 (1992-03-01), Domvile
patent: 5248422 (1993-09-01), Neu
patent: 5376393 (1994-12-01), Nardelli et al.
patent: 5628913 (1997-05-01), Modig
patent: 6030537 (2000-02-01), Shaniuk et al.
patent: 6406628 (2002-06-01), Chang et al.
patent: 6485645 (2002-11-01), Husain et al.
patent: 6653514 (2003-11-01), Murray et al.
patent: 6752849 (2004-06-01), Logan et al.
patent: 6849187 (2005-02-01), Shaniuk
patent: 2002/0074292 (2002-06-01), Schlegel et al.
patent: 2004/0050795 (2004-03-01), Park et al.
patent: 2006/0243009 (2006-11-01), Burnham

Affiliated with

Also associated with

Rating

Method of removing phosphorus from wastewater does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of removing phosphorus from wastewater, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of removing phosphorus from wastewater will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3858054