Naiade water purification unit
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On this page, a commercial water treatment system is presented. The information on this page has been provided by the company who produce the products, and has not been checked by Akvo. The appearance on this page does not mean that Akvo endorses the product. If you would like to add a product, please contact m.t.westra
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'*' note: A special insert for the removal of arsenic can be supplied as a non-standard item. More info via [1].
What is a Naiade?
The Naiade water disinfection unit is a spin-off from Nedap’s and Trojan’s know-how of large scale drinking water and industrial waste water treatment plants. The Naiade drinking water disinfection unit very effectively combines the potential offered by solar energy, UV light and battery back-up.
The Naiade has been designed to remove bacteria, protozoa, viruses and colloidal parts from raw sweet water. It operates without the use of fossil fuel or chemicals.
The unit is made of tropical resistant poly ethylene. Its dimensions are 150 x 50 x 50 cm.
How Does It Remove Contamination?
The purification of the Naiade are:
- a sieve to remove larger parts such as leaves, stones etc.
- a 25 micron filter bag
- a 10 micron filter bag
- a UV light, which kills any remaining bacteria and viruses
Operation
The Naiade can be installed in 30 minutes by local people without a technical background. A step-by step, pictured instruction leaflet and tools are provided.
The user has to fill the unit with raw sweet water. This can be done via the top lid. The water passes a coarse sieve, two filter bags, 25 and 10 micron resp., and a cylindrical tube with a UV lamp. The unit has its own reservoir for raw water of 100 liters. The unit is so easy to use that even small children can operate it.
After having filled the unit with raw water, one just pushes the button. Clean and disinfected water flows out from the tap. The normal flow rate is 5 – 6 liters per minute. No waiting time is required. Water flow can be stopped/interrupted by pressing the button again. After 2 minutes, the tap closes automatically to avoid spillage of water. The flow rate is not influenced by the user, it is restricted by the design to guarantee a proper UV treatment of all passing water.
The capacity is about 3,500 liters per day, depending on the scale of organization.
The disinfected water fulfills the World Health Organization standards. Pathogen reduction rates up to 99,9999 % are obtained in many applications. (More details are available on request). It is strongly recommended to use separate containers for the raw and disinfected water to avoid recontamination.
The unit can function at night using a car battery of not less than 37 amp/hr capacity.
Technical details
The unit does not contain any moving parts except for the electro-magnetic tap.
It is made of tropical resistant poly ethylene. All material as well as the applied technology is based on the intensive use in remote and tropical areas.
The unit has been designed for operation under harsh conditions in grass root societies. Units can be installed, operated and maintained by people with no or little/low technical education or background.
The estimated lifespan of the unit is over 10 years. Filter bags and UV lamps may need earlier replacement.
Advantages
- Immediate use after installation
- Supply for great number of people
- High yield
- State-of-the-art UV technology
- Robust technology
- Use of re-usable materials
- Independent of fossil fuel or electrical network
- Alternative to liquid chlorine disinfection
- Environmentally friendly
- The use of a native speaking sales and distribution network
Country experiences
Naiade projects have been realized in
Afghanistan, India, Sri Lanka, Pakistan, Indonesia, China, Brazil, Surinam, Mexico, Colombia, Morocco, Senegal, Sudan, Mozambique, Madagascar, Burkina Faso, Ghana, Tanzania, Cameroon, Benin, Mali, Egypt, South Africa, Kenya, Nigeria.
Maintenance requirements
Both filter bags can be removed from the unit for cleaning purposes. After careful flushing these bags can be replaced. The life span of the UV lamp is 10,000 operating hours, nearly 3 years. The UV lamp can be replaced within half an hour by the users themselves.
The cleaning procedure should be as follows:
- Daily cleaning the PV panel for optimal energy supply
- Regular rinsing or washing of the filter bags to avoid blockage by sediments or a micro biological layer
- Regular cleaning of the glass tube of the UV lamp to avoid sedimentation. This highly depends on the chemical consistency/content of the raw water.
A colored LED indicates the status. After 8,000 hours of use the unit starts giving warning for necessary replacement of the UV lamp, although the users still have 2,000 hours of use to exchange the UV lamp. After 10,000 hours the unit will not supply any water until the old UV lamp has been replaced.Replacement of the UV lamp can be done on the spot by just undoing four screws. The UV lamp is a standard industrial UV lamp.
Company information
Company: Nedap NV
Visitor address:
Parallelweg 2
7140 DC Groenlo
The Netherlands
Postal address:
P.O. Box 101
7140 AC Groenlo
T +31 (0)544 471 888
F +31 (0)544 486 008
E [email protected]
Websites:
