Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Transparent
Patent
1999-07-19
2000-10-03
Drodge, Joseph W.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Transparent
210103, 210138, 210141, 210142, 2102211, 2102212, 210703, B01D 2130
Patent
active
061268151
ABSTRACT:
Sequential DAF apparatus and methods providing zero pool and nonmechanical waste material removal are disclosed which include a number of floatation tanks each arranged to operate either independently or sequentially, each tank has a conical shaped bottom with a centrally located port at the lowest vertical position of the tank, each tank is fitted with a number of valves and plumbing which allows an operator to fill each tank with waste water charged with dissolved air through the central port which is then retained during a floatation period to allowed waste material to separate from clarified water in the tank. Clarified water and waste material is removed from the bottom of the tank through the central port. Water clarity sensors are positioned in the tank near the central port. A final rinsing step may be included to assure all floated material is removed from the tank before refilling. The system may include any number of tanks necessary to achieve net flow of the waste water stream entering the system while the tanks are dimensioned and flow rates are adjusted so that a tank fill flow period, retention period, and clarified water and waste material drain period are about equal allowing sequential operation of the system and net flow.
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