__NOTOC__<small-title />
[[Image:WaterPurifier.jpg|thumb|right|200px|A WaterPurifier being used]]
The WaterPurifier is a water treatment system that can be installed in rural areas. The unit removes all pathogens and produces clean and safe drinking water without external use of electricity or chemicals.
The WaterPurifier is different from other water purification systems because, it only needs sunlight to operate and the unit creates disinfectant that provides residual chlorine, thus preventing recontamination. It can be used everywhere. It is extremely robust, compact, and easy to transport. It helps organizations in developing countries.
===Suitable conditions ===The WaterPurifier is not designed to remove turbidity or chemical contaminants. {{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#f0f8ff;" | Disadvantages|-| valign="top" | - Good quality of water. <br>
- Easy to operate<br>
- It uses solar energy. <br>
- It filters the water with a ceramic filter that lasts for approx. 5 years. Thus no need of disposable filters.<br>
- Chlorine residue preventing from recontamination from bacteria <br>
| valign="top" | - Spare parts only available on order
|}
| con=
- Spare parts only available on order
}}
==History and social context==
==Suitable conditions ==
The WaterPurifier is not designed to remove turbidity or chemical contaminants.
{{Potential_Treatment_Capacity_table
}}
==Technical specification=Operations and maintenance= ====Operation====
The WaterPurifier is very easy to operate. One main switch will switch the unit in operation ready mode. If you tap the purified water the disinfection will start immediately. If you stop tapping water the disinfection is switched off. To generate enough pressure for the filtration process, water has to be kept in the barrel above the unit. Water pressure results in clean water. If the water barrel is empty a LED alarm light will warn you.
The WaterPurifier is a self-contained, ready-to-use, water purification unit. There are no moving parts within the flight case as everything is build on a frame that does not move. The flight case is build so that it can be dropped on a luggage belt; normally the cases will be pitched on this. So it can survive in a lot of circumstances.
Maintenance is simple. The filter is cleaned with a hand-powered air pump or a bicycle pump which can pump up a small air container up to 6 bar pressure. This hand made pressure is used for backwashing the membrane filter with an air pulse driven clean water backwash.
====Treatment Efficiency====
Input water turbidity can go up to 500 NTU and the output turbidity is < 1 NTU.
The water remains safe due to the after-disinfection. Quality can be checked with an indicator strip.
====Maintenance====
Maintenance is simple. The filter is cleaned with a hand-powered air pump or a bicycle pump which can pump up a small air container up to 6 bar pressure. This hand made pressure is used for backwashing the membrane filter with an air pulse driven clean water backwash.
====Manufacturing====
The estimated lifespan is 20 years if well maintained. The membranes and the electrodes have to be replaced after 5 years.
==Cost=Costs===
{{Treatment_Cost2
|CapCost= € 1.800
The estimation is based on the 600 litres/day unit. The cost per litre of treated water in this case is calculated over 20 years. With 3 times replacement of membrane & electrodes. Operating cost includes salary of 1 operator, assumed to be working 1 day per week based on average annual GNI per capita in third world countries of €500 fulltime (World Bank).
==Country =Field experiences===
At the moment The WaterPurifier have sales representatives in The Netherlands, Kenya, Dominican Republic, China and Egypt.
==Manuals=Acknowledgements= ==Movies== ==Footnotes== ==Acknowledgements==
==References==To order a WaterPurifier unit from the Netherlands manufacturer: [http://waterforeveryone.nl/waterpurifier/waterpurifier-500uv WaterForEveryone.nl].