Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-07-26
1981-03-31
Therkorn, Ernest G.
Liquid purification or separation
Processes
Treatment by living organism
210220, 210631, 2101953, 210754, 210626, C02F 322
Patent
active
042591821
ABSTRACT:
A waste treatment apparatus provides a cylindrical vessel adapted to receive a waste water flow therethrough to be treated. The vessel provides an aeration chamber at the outer peripheral portion thereof, with a desirable generally helical flow being generated by aeration bubbles striking angularly deposed baffle plates. A clarifier is provided at the central portion of the cylindrical vessel for clarifying a liquid which enters the clarifier from the aeration chamber. The clarifier comprises a first settling chamber and a second decant chamber through which clear water is collected and transmitted to a chlorination chamber for subsequent discharge. The angularly deposed baffle plates are mounted in the upper portion of the aeration chamber and aid in spinning waste water in a circular or curved path. Likewise, a pair of aeration diffusers mounted in the lower portion of the aeration chamber near the center of the cylindrical vessel move waste water to be treated upwardly and outwardly in a circular path. The combination of the diffusers and the baffles move the waste water in a generally helical path for prolonged contact time and improved mechanical masceration. Additionally, the helical path thus generated tends to move solids away from the clarifier entrance thus further enhancing the separation of solids from the decant liquor.
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Cronan, Chemical Engineering, "Treaten Counters High BOD Waste Stream", Apr. 1957, p. 186.
Houston Systems Manufacturing Co.
Therkorn Ernest G.
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