Thickening and Disintegration
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Catalog excerpts

Thickening and Disintegration - 1

DECANTER CENTRIFUGES & PLANTS FOR SOLID/LIQUID SEPARATION HILLER DECANTERS FOR THICKENING AND DISINTEGRATION General process concept To achieve an ideal consistency in the raw or mixed sludge prior to the digestion, as a general rule the excess slduge is mechanically thickened before mixing with the primary sludge. The excess sludge thickening reduces the amount of sludge fed to the digestion tank. This yields considerable energy savings and better use of the digestion system, as well as longer retention times in the digestion process. This results in further reduced digested sludge quantities as well as improved dewatering properties thereof. ■ achieve an ideal consistency in raw/ mixed sludge prior to the digestion ■ reduce the sludge volume fed to the digestion tank ■ better use of the digestion tank and therefore longer retention time in the digestion tank ■ increase in the maximum possible discharge DS during the digested sludge dewatering HILLER decanter for thickening Decanters for thickening are not designed according to the classical counter current principle, but according to the direct current principle. Thanks to this design, the suspension passes through the entire length of the centrifugal chamber in the direction of the discharge. The centrate water runs through channels in the direction of the weir openings. The result is a very long clarification section and thus minimal or no polymer as well as achieving the highest separation efficien

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Thickening and Disintegration - 2

HILLER DECANTER „DECATHICK“ ADVANTAGES OF THICKENING WITH THE HILLER „DECATHICK“ DECANTERS COMPARED TO OTHER THICKENING SYSTEMS: ■ vapour-proof design ■ operation without polymer dosing possible ■ starch polymers and chitosan can be used as supporting agents ■ minimum energy consumption (~0,2 kW/m³) ■ no intermediate flushing cycles required for continuous operation - No water consumption during operation ■ no filter cleaning required ■ fully automatic operation due to feed concentration measurement in conjunction with HILLER SEE-Control pro ■ process values largely independent of sludge...

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Thickening and Disintegration - 3

HILLER LYSAT TECHNOLOGY HILLER THICKENING DECANTERS CAN BE OPERATED WITH AN ADDITIONALLY INSTALLED LYSING DEVICE The approach of determining economic and procedural advantages for further sludge treatment by means of a disintegration process is not new. Various physical or chemical solution approaches are all aimed at the following objectives: ADVANTAGES OF THE HILLER LYSAT TECHNOLOGY: ■ viscosity reduction and better pumping properties at high thickening degrees ■ cell disruption increase resulting in an increased degradation of the organic share ■ gas yield increase ■ improved dewatering...

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Thickening and Disintegration - 4

Hiller GmbH Schwalbenholzstraße 2 84137 Vilsbiburg Tel +49 8741 48-0 Fax +49 8741 48-139 info@hillerzentri.de www.hillerzentri.de

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