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The PSD is a simple, compact and highly effective device for separating dissolved contaminants and/or suspended solids from liquids. The device may use appropriate chemicals to convert emulsified, dissolved and suspended substances into separable solids.
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While there are many
large-scale processes/plants available for water treatment (treatment of water for drinking and industrial purposes, or treatment of trade wastewater), there are no practical or economic water treatment processes/plants for many smaller businesses to install and use.
The PSD provides a low cost and effective batch treatment of small to medium volumes of contaminated liquids, viz. 0.5 to 4m3/h (up to 100m3/day) of liquids per a device.
Applications include the treatment of wastewater from printing workshops, detergent manufacturers, metal plasma cutting operations, electroplating plants, small poultry farms, piggeries and abattoirs. |
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Piston Solid/Liquid Separation Device (PSD) is diagrammatically shown on the right. The PSD comprises: a treatment chamber (1) having a piston (7) movable therein between a start position in the upper part of the chamber and an end position in the lower part of the chamber, drive means outside the chamber for moving the piston, a liquid inlet (8) below the piston in the start position thereof, a treatment agent and mixing inlet (21 to 23), an outlet (3) for the discharge of solids below the piston in the end position thereof, and a liquid outlet (27 to 31) above the piston in the end position thereof, the inlets and the outlets being controlled by valves (4, 9, 24 to 26, and 32 to 36), the piston (7) being permeable to the liquid but substantially impermeable to the solids. |
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The PSD combines simplicity, effectiveness, and low capital and operational costs. The main advantages of the PSD are that it:
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is compact and easy to operate;
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carries out all major water and wastewater treatment processes (precipitation, breaking of emulsions, coagulation, flocculation, separation of solids from liquids, neutralization and dewatering of sludge) within itself;
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quickly and effectively separates solids from liquids; and
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can be semi-automatic, and then it requires little operator involvement. |
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The PSD will process up to 4 cubic metres of water or wastewater per an approximately hour cycle. A number of modular units may be used simultaneously to achieve a greater capacity; there units can be controlled by a single controller, with the timing of operation being so adjusted that
near-continuous flow is achieved.
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FOR A COMPREHENSIVE DESCRIPTION OF THE
PSD, SEE THE INTERNATIONAL PATENT APPLICATION PUBLISHED BY THE INTERNATIONAL BUREAU OF THE WORLD
INTELLECTUAL PROPERTY ORGANIZATION
(
click
here ) |
OR E-MAIL YOUR REQUEST FOR THIS DESCRIPTION TO:
engineering
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