Floating media biofilter

Details Floating media biofilter Floating media biofilter

1994-01-13

1995-08-29

Dawson, Robert A.

Liquid purification or separation

Processes

Treatment by living organism

210793, 210796, 210808, 210107, 210108, 210150, 210151, 210248, 210276, 210277, 210280, C02F 300

Patent

active

054457408

ABSTRACT:
A floating media biofilter is provided, comprising a tank having a bottom and a sidewall, the sidewall having a lower portion inwardly sloping toward the bottom. Floating media are present in the tank for forming a media pack when the tank is filled with liquid, and the media are retained by an upper screen positioned in the upper portion of the tank. An inlet line provides nonfiltered liquid to the tank from an aquaculture environment, while an outlet line above the upper screen delivers filtered liquid back to the aquaculture environment. A weir is employed between the upper screen and the outlet line to collect filtered liquid from the media pack. Backwashing is accomplished by a motorized blade system which causes the media to circulate within the tank with substantially no expansion of the media pack. The circulating media loosens filtered matter and sludge entrained therein so that the waste solids can be removed by a sludge line connected to the bottom of the tank. A bypass line connected between the weir and the inlet line divert liquid from the environment to provide an additional flow of liquid over the media during backwashing operations. The slow speed and manner of the media circulation serve to protect the beneficial biofloc film on the media pellets from becoming sheared away during backwashing, and minimizes the size of various components required to operate the biofilter.

REFERENCES:
patent: 3819054 (1974-06-01), Long et al.
patent: 4198301 (1980-04-01), Iwatani
patent: 4547286 (1985-10-01), Hsiung
patent: 4885083 (1989-12-01), Banks
patent: 5009776 (1991-04-01), Banks
patent: 5126042 (1992-06-01), Malone
patent: 5227051 (1993-07-01), Oshima
patent: 5232586 (1993-08-01), Malone

Affiliated with

Also associated with

Rating

Floating media biofilter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1817806