[[Image:The Perfector-E.jpg|thumb|right|200px|The Perfector-E. Photo: PWN Technologies.]]
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The Perfector-E is a self-contained portable water treatment system. It is originally developed for emergency aid purposes by PWN, Waterleidingbedrijf Noord-Holland, the Netherlands. However, it is also applicable as a permanent, decentralised, stand-alone water supplying unit.
The Perfector-E is capable of treating any polluted surface water and providing high quality potable water. It is not designed for desalination, but it is a perfect pre-treatment for RO.
It uses Norit X-Flow elements in its membrane modules with permanent hydrophilic low-fouling UF membranes. The capacity is approx. 2.000 l/hour, using power supply of 230 Volts/3,1 kW or via supplied power generator (5kW). There are two operational pumps: feed pump of 2,5 m3/h and backwash pump of 12 m3/h. The dimensions are 1,1x1,1x2,2 meters.
===Suitable conditions ===
The perfector-E should be kept at a maximum distance of 25 meters from a water source.
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! width="50%" style="background:#efefef;" | Advantages
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| valign="top" | - Produces high quality potable water <br>
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===Construction, operations and maintenance===
[[Image:perfecter-e2.jpg|thumb|right|200px|The Perfecter-E used in Haiti. Photo: PWN Technologies.]]
The membrane lifetime is 3-5 years depending on water source quality.
===Costs===
{{Treatment_Cost2
|CapCost=~US$ 42.000 = €30.000
'''Note''': Assuming a lifetime of 5 years, 16 hours daily operation, meaning approximately 2.000 litres/day is processed, no membrane replacement is required. The UV lamp should be replaced every 2 years. The cost of one UV lamp is €300 (medium pressure; 9.000 hours). Operation cost is based on 16 hours per day * 3,1 kWh; electricity price in the Netherlands per kWh is €0,08. Hence, estimated annual electricity cost is €1450. Salary is assumed €500/year (fulltime); based on GNI per capita of least developed countries (World Bank).
===Field experiences===
The Perfector-E has been successfully applied and still in full operation in Indonesia, India, Pakistan, Peru, Soudan, Rwanda, Angola, Romania, Benin, south Africa, Egypt, Sudan, Kenya, Nepal, Philippines, Congo and China.
===Acknowledgements===
* PWN Technologies: [http://www.pwntechnologies.com/solutions/perfector/index.html Perfecter Designs].