Algas Fluid Techology, Moss, Norway, has designed a microfilter to operate as an independent and continuous cleaning process. The company claims this results in substantial returns on fibre saving and raw water consumption.

Originally designed for the recovery of fibre from white water and producing a filtrate of sufficient quality for reuse throughout the mill (showers, mechanical seals), the Algas microfilter system also addresses the need to save and re-use more water. This includes improving "clear" water from existing savealls, disc filters, DAF etc. to "super clear" quality that allows its re-use in high pressure showers; treating filtrate from screw presses to save fibre and water; pre-thickening of biosludge; and microfiltration after final bio-treatment for water re-use or discharge.

Other benefits include reducing power consumption and the amount of water required to be heated for use throughout the mill by using polished water, as well as reducing effluent discharge flows to better meet or exceed environmental discharge standards.

A single Algas microfilter system reportedly saves in excess of $300,000, with some installations reporting returns over $1 million annually. Analysis of mill opportunities, recommendations on installations and savings potential is offered by experienced technical staff. The company offers a trial test unit to accurately assess potential economic benefits.

Algas Fluid Technology Systems AG, www.tecumseth.com

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