Backwashing unsaturated wastewater filter

Details Backwashing unsaturated wastewater filter Backwashing unsaturated wastewater filter

2011-03-29

2011-03-29

Upton, Christopher (Department: 1776)

Liquid purification or separation

Processes

Treatment by living organism

C210S618000, C210S150000, C210S903000

Reexamination Certificate

active

07914678

ABSTRACT:
A compact high efficiency combined biological and physical unsaturated wastewater treatment filter configured for periodic backwashing is disclosed. The filter utilizes packed media and removes pollutants and pathogens from wastewater and other dirty water sources. The filter comprises a periodic backwashing means to less the chance that biofilm growth will clog the media pores. However, such backwashing still leaves sufficient biofilm attached to the media to maintain a very high level of treatment. In the preferred embodiment, the filter utilizes high frequency dosing to cause pore saturation at or near the surface during dosing and shortly thereafter in order to maximize distribution uniformity and to induce downward airflow into the media. The system provides a number of unexpected benefits; including allowing a very low distribution pressure and providing high oxygen transfer at low energy utilization into the filter media for aerobic biodegradation of pollutants.

REFERENCES:
patent: 853217 (1907-05-01), Bordigoni
patent: 947333 (1910-01-01), Hamilton
patent: 2220859 (1940-11-01), Bispham et al.
patent: 3545619 (1970-12-01), Ettlich et al.
patent: 3725263 (1973-04-01), Harris
patent: 3846305 (1974-11-01), Schreiber
patent: 4076616 (1978-02-01), Verde
patent: 4179374 (1979-12-01), Savage et al.
patent: 5348654 (1994-09-01), Fischer
patent: 5525230 (1996-06-01), Wrigley et al.
patent: 5578200 (1996-11-01), Funakoshi et al.
patent: 5633163 (1997-05-01), Cameron
patent: 6383373 (2002-05-01), Nakao et al.
patent: 6790347 (2004-09-01), Jeong et al.
patent: 2006/0124540 (2006-06-01), Austin et al.
patent: 7-155751 (1995-06-01), None

Affiliated with

Also associated with

Rating

Backwashing unsaturated wastewater filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Backwashing unsaturated wastewater filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backwashing unsaturated wastewater filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2752626