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1996-11-18

1998-07-21

Cintins, Ivars

Liquid purification or separation

With gas-liquid surface contact means

210263, 2105001, 264148, 26417716, 428402, C02F 310, B29B 906

Patent

active

057830665

ABSTRACT:
A pellet formed from a mix of two polymer materials which are non-homogenous is extruded through a die to form a highly roughened surface creating an enhanced melt fracture appearance. The extrusion is chopped into pellet form to provide a large surface area pellet to be used as a harbour for biomass in water treatment processes. Large quantities of such pellets in a filter provide a very effective filtration effect, largely because the highly roughened surface provides an enormous number of cavities within which the biomass can be retained.

REFERENCES:
patent: 4294638 (1981-10-01), Rasmussen
patent: 5055186 (1991-10-01), Van Toever
patent: 5126042 (1992-06-01), Malone

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