Liquid purification or separation – Processes – Treatment by living organism
Patent
1989-03-28
1990-02-27
Wyse, Tom
Liquid purification or separation
Processes
Treatment by living organism
210614, 210617, 210744, 210747, C02F 332
Patent
active
049043862
ABSTRACT:
The filter bed containing aquatic plants planted therein is provided with a lengthwise and/or transverse drainage arrangement containing a predetermined number of drain pipes. Particularly during the growth phase of the aquatic plants, the drainage arrangement constitutes a by-pass flow path by-passing the aquatic plant-containing filter bed. The throughflow through such by-pass flow path is controlled as a function of the operating conditions using adjustable control devices. Furthermore and in order to also control the hydromorphous conditions of the aquatic plant-containing filter bed, outfeed level control devices are provided for controlling the hydraulic gradient along substantially the entire aquatic plant-containing filter bed as a function of its operating conditions. The throughflow through the aquatic plant-containing filter bed thus can be controlled for achieving optimum purification of the inflowing liquid under substantially all occurring operating conditions.
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"Root-Proximate Reaction Zones in Hydromorphic Soils" by Reinhold Kickuth and Hans-Joachim Grommelt, Int. Symp. Gumpenstein, 1982.
"Report of a visit by Arthur G. Boon, Dr. Robert D. Davis and Dr. Robert J. Huggins to Germany (GFR) to Investigate the Root Zone Method", Jan., 1985.
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