PRODUCTS & SERVICES

STC SIDESTREAM FILTERS FOR COOLING TOWERS AND COOLING SYSTEMS

The Problem
Cooling towers continually collect solid matter from airborne dust, pollution, precipitated hardness salts and corrosion products. All this material circulates through the system, combining with the biofilm and fouling condensers, heat exchangers and the other process equipment reducing operating efficiency and increasing maintenance and cleaning requirements.

Legionnaires Disease
Suspended solids circulating in the cooling water encourage bacteria by providing protein for growth in addition to harbouring and protecting biological activity. Sludge accumulations in low flow areas provide an ideal breeding ground for bacteria such as Legionella Pneumophila.

The Solution
Using high performance cyclone separators the Waterwise STC range of sidestream filters continually remove suspended solids down to less than 20 micron in size from the cooling water and purge the cooling tower sumps of any accumulated debris. The accumulated dirt is automatically purged to drain without backwashing and with no interruption in the filtration using the minimum amount of water.

Legionella Control
The Waterwise STC sidestream filtration systems combat the threat of Legionella at source and allow the bio-control systems to work effectively, by continuously removing the suspended solids from the cooling water and purging the cooling tower pond of accumulated debris that harbour and encourage bacteria.

Filtration of Cooling Water Improves Water Treatment Performance

• Reduces Corrosion by keeping internal surfaces clean and free of debris allowing inhibitors unimpeded access to protect the metal surfaces.

• Reduces Erosion by removing suspended solids which cause surface erosion of pumps and equipment.

• Reduces Chemical Treatment Costs by removing suspended matter reducing dosage of corrosion inhibitors, biocides and dispersants required to maintain water quality.

• Easily installed on New or Existing Systems. Being compact and readily transported Waterwise STC filters are simply located adjacent to the cooling tower and connected to the cooling tower sump independent from the system pipework and connections.

• Reduces Biological Activity by removing suspended solids which harbour and encourage bacteria.

• Reduces the Risk of Legionella by preventing sludge and silt deposits which harbour and encourage legionella bacteria and reduce biocide effectiveness.

• Reduces Cleaning by continually removing suspended solids and preventing any build up.

• Improves Plant Efficiency by maintaining clean surfaces in heat exchangers and cooling tower packs.

• Extends Equipment Life by preventing erosion of pumps, valves and controls.

• Reduces Surface Foam by removing suspended solids which encourage and stabilise foam.

• Improves Dispersant Performance and reduces scale formation by removing precipitated hardness salts allowing dispersants to be effective.