Liquid purification or separation – Recirculation
Patent
1976-11-26
1978-03-14
Hart, Charles N.
Liquid purification or separation
Recirculation
210220, 261123, 261124, C02C 108
Patent
active
040790088
ABSTRACT:
A mixing vessel is provided for the treatment of wastes with aerobic bacterial cultures having high-turbulent mixing under conditions supportive of rapid waste digestion. The mixing vessel has a chamber therein with a sparger depending into the central portion and providing streams of incoming untreated waste feed that are distributed radially from the longitudinal axis of the vessel. Medially positioned in the chamber is an annular collector concentric to the sparger for withdrawing waste material under treatment into a recirculation loop. The collector is operatively associated with a recirculation pump, a system outlet, an aeration fluid delivery means and a jet injector. The jet injector has a nozzle for propelling at high velocities a jet of fluids upwardly into the chamber along the longitudinal axis. The jet is comprised of recirculation wastes and entrained air. Associated with the nozzle is a deflector plate which serves to deflect and break the jet into a multiplicity of mixing currents causing each current to flow from the deflector plate radially (or outwardly) toward the base or lower portion of the sidewall of the chamber, thence diverted along such sidewall, thence diverted by the top of the chamber radially (inwardly) to the portion of the chamber surrounding the longitudinal axis and downwardly therealong.
Rapid digestion may be achieved as aerobic bacterial culture contact with the waste under treatment is enhanced by the turbulent flow conditions and aeration fluid flow to support bacterial growth may be optimized.
The mixing vessel may be adapted for batch or continuous processing by suitable flow controls for waste feed, system outlet, recirculation rate, and aeration fluid metering.
REFERENCES:
patent: 2047989 (1936-07-01), Woelflin
patent: 3446488 (1969-05-01), Mail et al.
patent: 3642618 (1972-02-01), Silva
patent: 3645892 (1972-02-01), Schulman
patent: 3772187 (1973-11-01), Othmer
patent: 3870635 (1975-03-01), Clarke-Pounder
Bobis Daniel H.
Castel Benoit
Hart Charles N.
Worthington Pump, Inc.
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