Drum Tray Filters
The drum tray filter is made to fit most open top drums. Different grades of filter fabric are available; unit comes in enameled steel with a powder-coated basket.
Working Principle
It works with the below principles
-water gravity flows into the rotating drum -rotating filter element collects floating debris, solids and fibres -screen is cleaned with directed spray nozzles, filtered water is used for this purpose -dirt is collected in the integrated collection tray; equipped with a dewatering screw -collected dirt is forced out of the collection tray with a screw and subsequently collected in a suitable discharge system -water flows out of the filter through the lower placed outlet
Application area
It is used in the industries related to
-intake water; river-, lake- & seawater -waste water treatment, effluent polishing in municipal and industrial WWT plants process water, removal of organic and fibrous solids -desalination plants -membrane filtration plants -UV – pre filter -power plants -communal and industrial waste water treatment plants -pulp & paper processing -food processing, re use of washing water -irrigation -aqua culture, fish farming
Advantages
The Drum Tray Filters have the following advantages
-efficient and continuous removal of organic matter and light floating solids from river-, lake and sea water -completely automatic operation -easy installation -separation down to 20 micron -exchangeable elements -no pressure required, gravity fed system -low energy use, limited maintenance and labour requirement, low operational costs -level controls initiate motor functions only when required -no process interruptions -unlimited flow capacity in small footprint -efficient and high reduction of suspended solids -reduction of BOD5 and COD -reduction of phosphor, ammonia, nitrogen value
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