Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-06-24
1990-06-05
Hruskoci, Peter
Liquid purification or separation
Processes
Treatment by living organism
210617, 210618, 210804, 210104, 210120, 210138, 210151, 210265, 210311, 210313, C02F 304
Patent
active
049311832
ABSTRACT:
In a process and apparatus for the biological purification of water by means of a closed percolating filter operated with pure oxygen and/or air, and an upward-flow filter disposed downstream of the percolating filter, with flotation filter material therein, saturation of the gas cushion predominantly containing oxygen in the percolating filter is controlled by selection of the operating pressure in such a fashion that the oxygen supply corresponds to the biochemical oxygen demand of the water on the one hand, while on the other hand a residual oxygen content dissolved in the water permits continuation with a biological fine purification operation in the upward-flow filter. The apparatus comprises a first chamber with the percolating filter, the water flowing downwardly therethrough, and a second chamber with filter material through which the water flows upwardly. Water accumulating above the filter material is removed through a discharge conduit, with the waste water and oxygen-bearing gas being introduced into the top of the first chamber.
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Klein Hans-Ulrich
Kratzenstein Klaus
Hruskoci Peter
Upton Christopher
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