IPS media filtration removes fine contamination

Industrial Purification Systems (IPS) has installed high-efficiency media filtration in the vehicle wash facility at a commercial test and validation centre for the automotive industry.

The Millbrook vehicle test and development facility in Bedfordshire has been used for the testing and proving of new and off-road vehicles since the early 1990s.

After each vehicle has been tested, they are then washed, a routine that is carried out using mains-fed water.

Operating a facility that includes every type of land vehicle, from motorcycles and passenger cars to heavy commercial, military and off-road vehicles, was impacting heavily on water use, both in terms of cost and the environment.

The company was therefore keen to look at ways to minimise this water use and by so doing drive down energy bills and reduce the impact on the environment.

However, it didn't want to compromise vehicle wash finish, which was an important aspect to its reputable service offer.

Millbrook's vehicle wash facility was using a 2,000-litre flow rate and was encountering high solids concentrations, as well as residual oil and grease.

The nature of vehicle wash systems means that particulate solid is extremely small in terms of micron size - typically down to 1.0 micron.

A further issue was a lack of space and limited access to the plant room.

IPS's solution was to design a bespoke four-stage filter and chemical dosing system fabricated around a two-level skid to accommodate the space limitation.

The system included chemical dosing pumps, chemical storage tanks, inlet and outlet buffer tanks, first-stage kinetic separators, the CrossflowMF1.0 and backwash recovery filter, as well as associated pumps and controls.

Fabricated in such a way as to enable shipment to site in parts, it was then assembled on site in the plant room.

The key to the system was the CrossflowMF1.0 technology, which allows for the reuse of potable water.

This high-efficiency media filtration technology removes fine contamination down to 0.45 micron reliably, delivering high-quality water at all times.

The technology also enables the use of surface water such as rainwater effectively for wash water, thereby further reducing overall operational costs.

'Having the capability to reuse potable water, or being able to draw on alternative water sources such as borehole and rainwater harvesting, will go a long way to providing a sustainable environmental solution and save on energy consumption,' said Andy Evans, specialist engineer at IPS.

'Most industrial and commercial water sources tested to date show an expected contamination above 20 micron.

'However, the distribution and population of particulates is consistently higher at less than 20 micron, much of which is biological.

'This is even more pronounced below 10 micron, which is the traditional cut off point for main stream filtration technologies and is the key reason why a business can lose this 30 per cent in energy performance.

'Until now there has not been a reliable method of filtering out fine contamination.

'New self-cleaning filtration technology provides a very real solution because it effectively removes contamination to less than 1.0 micron, without the prohibitively high capital/revenue costs normally associated with water polishing applications,' he added.

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