Closed vessel, medium pressure UV available in UK

After tremendous worldwide success of large, closed vessel medium pressure UV disinfection systems in municipal water and wastewater applications, Berson UV-techniek now offers them in the UK

Berson, a Halma company based in the Netherlands, will be building on the reputation of its British sister company Hanovia, and using the Hanovia extensive service support network.

Berson medium pressure InLine systems are especially designed to provide closed vessel disinfection of both drinking water and wastewater at very high volumes and flow rates.

Berson is the only manufacturer of medium pressure UV water disinfection systems to be certified to the stringent German DVGW Standard, W294 (Parts 1, 2 and 3) - the highest standard currently possible in the world.

Major advantages of closed vessel, medium pressure UV compared to open channel, low pressure UV systems include a much smaller footprint, automated, mechanical cleaning of the UV lamps, and permanent de-activation of micro-organisms.

Conventional low pressure open channel UV wastewater systems often need large treatment channels and many numbers of UV lamps, taking up valuable space that could be used for other purposes.

Berson closed vessel, InLine medium pressure systems, on the other hand, have a very small footprint and can easily be integrated into existing pipework with minimal disruption: they are already widely used in Germany, France, Scandinavia, the USA and Australia.

Keeping all the UV lamps clean in open channel, low pressure systems is also a difficult task and usually requires chemical dosing, a costly and time-consuming process which produces unwanted waste products which have to be dealt with effectively.

Closed vessel systems, on the other hand, use in-built automatic wipers which manually clean the quartz sleeves surrounding the UV lamps, doing away with the need for chemical cleaning.

Finally, microbial re-growth, known as photo-reactivation, has been shown to occur when micro-organisms such as E.coli are treated with low pressure UV and subsequently exposed to sunlight, as is the case with open channel, low pressure UV systems.

This does not happen with closed vessel medium pressure UV systems (* See references 1 and 2).

"We are delighted to be moving into the UK municipal water and wastewater market," commented Sjors van Gaalen, Berson managing director: "Our UV technology is well established on the European continent and in the USA and Australia, but relatively unknown in the UK.

We strongly believe that our unique offering of closed-vessel, medium pressure UV technology will prove just as successful here as it has done around the world".

Berson, along with fellow UV companies Hanovia in the UK and Aquionics in the USA, is part of the Fluid Technology Division of Halma plc.

Together, the three companies make up one of the largest suppliers of UV disinfection technology in the world.

* References:.

1) Zimmer, J L and Slawson, R M (2002): Potential repair of Escherichia coli DNA following exposure to UV radiation from both medium and low-pressure UV sources used in drinking water treatment; Applied and Environmental Microbiology, Vol 68, No 7, 3293-3299.

2) Hu J Y, Chu, S N, Quek, P H, Feng, Y Y, and Tan, X L (2005): Repair and regrowth of Escherichia coli after low and medium-pressure ultraviolet disinfection; Water Science and Technology: Water Supply, Vol 5, No 5, 101-108.

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