WADI Solar Disinfection System

Helioz

WADI is a solar powered UV measurement device that determines when solar water disinfection (SODIS) occurs in PET bottles.

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Snapshot
Manufacturing & delivery
Performance & use
Research & standards
Feedback

Product description Brand name and product description

WADI is a device that measures radiation levels while water is placed under the sun in PET bottles. A happy smiley face in the display indicates the point at which the water has been in the sun long enough to kill bacteria.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Global regions which receive adequate sunlight

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

Partner organisations like Getwater.io, The GoodWater Company. Also, Helioz has implemented projects with distributors and institutions.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

40.60 USD

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

Solar water sterilizer Solvatten

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 6: Clean water and sanitation

Target user(s) Target user/consumer base (country, income segment)

Low-income groups

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

WADI is manufactured by Helioz GmbH in Austria

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

Trademarked

User Provision Model Where can the product be purchased/acquired by end users?

User can purchase the product directly by contacting the manufacturers or through Amazon.

Distribution to date Number of units that have been deployed, downloads or users to date

5000 units distributed as of 2013.

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Deactivation mechanism

Primary water purification method

Solar UV radiation

Energy source

Sunlight

Manufacturer-specified water treatment rate (L/hr)

Manufacturer-specified water treatment rate, measured in liters per hour

Once WADI and the nearby water has received sufficient UV radiation, the sad face will turn happy along with 4 constant progress bars.

Bacteria reduction

Laboratory-evaluated log scale removal rate of bacteria

6 log

Virus reduction

Laboratory-evaluated log scale removal rate of viruses

3 log

Protozoa reduction

Laboratory-evaluated log scale removal rate of protozoa

Unknown

Heavy metals and/or arsenic reduction

Reduction levels of heavy metals and/or arsenic through this treatment system

Unknown

Maximum recommended influent turbidity level (NTU)

Manufacturer-specified maximum level of inlet turbidity (NTU)

30 NTU

Effluent turbidity levels (NTU)

Range or value of outlet turbidity levels (NTU)

Does not reduce turbidity

Safe water storage capacity (L)

Is there safe water storage integrated into this product?

None

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

WADI continuously measures the sun’s radiation and compares these measurements with scientifically tested data. As soon as the incident UV-dose reaches that of the reference value stored in WADI, the device indicates happy face.

Product schematics Design and assembly illustrations

WADI is water resistant, dustproof and is of size of a hand. The reset button on top of the WADI must be pressed during exposure to sunlight. A sad face along with one flashing bar will appear. Over time, a second, third and fourth bar will appear along with a sad face. Once WADI and the nearby water has received sufficient UV radiation, the sad face will turn happy along with 4 constant progress bars.

Technical support Technical support provided by

Contact the manufacturer

Replacement components Availability of replacement components (in-country, by order,...)

Not available

Lifecycle Disposal and warranty

Minimum two years based on normal handling.

Manufacturer specified performance targets Designer / Manufacturer specified targets

WADI is free of any toxic substances and does not change the taste or appearance of water.

Vetted performance Findings of manufacturer evaluations or independent testing centers

WADI has been tested in various independent laboratories across Europe, Africa and Asia. SODIS technology is developed by ETH Zurich.

Testing organizations Independent lab, academic research centers, etc.

One of the research teams of BOKU scientifically certified the applicability of WADI.

Safety Potential hazards / risks related to operation of this product

Some basic safety measures are:

SODIS cannot be used for water with turbidity higher than 30NTU, polluted with water or harmful chemicals.
Only PET bottles are recommended for the use of WADI and SODIS.
Use of corrugated iron sheet for SODIS is highly recommended for better performance.
Regular cleaning of the solar cell and UV sensor is required to gaurantee adequate energy supply and correct measurements.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

Methods or techniques to remove turbidity, metals and harmful chemicals from water.

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

There is no academic research on the WADI system. However, an overview of research on solar disinfection (SODIS) is available here.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

WADI follows the WHO Guidelines for safe drinking water.

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

Product evaluation: The evaluation of the WADI consisted of laboratory testing of the product’s performance against all three
classes of pathogens. Testing followed requirements of the solar (UV and heat) technology-specific protocol. Following the manufacturer’s use instructions, three units (triplicate replicates) were evaluated for all three classes of pathogens in general and challenge test waters. A solar lamp was used to provide 550 W/m² of simulated outdoor solar radiation in a laboratory setting. This irradiance corresponds to what would likely be observed between latitude 15° N and 35° N as well as 15° S and 35° S, where the majority of developing countries are located.

Another evaluation report carried out by Agency of Cooperation and Research in Development (ACORD) in Uganda is available.

Other information

WADI gallery images

WADI video

FAQs

By reducing the use of firewood to disinfect water, WADI leads to significant CO2 reductions.

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

Snapshot

Product description Brand name and product description

Target region(s) Target region for distribution/implementation (listed by country if specified)

Global regions which receive adequate sunlight

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

Partner organisations like Getwater.io, The GoodWater Company. Also, Helioz has implemented projects with distributors and institutions.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

40.60 USD

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

Solar water sterilizer Solvatten

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 6: Clean water and sanitation

Target user(s) Target user/consumer base (country, income segment)

Low-income groups

Manufacturing & delivery

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

WADI is manufactured by Helioz GmbH in Austria

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

Trademarked

User Provision Model Where can the product be purchased/acquired by end users?

User can purchase the product directly by contacting the manufacturers or through Amazon.

Distribution to date Number of units that have been deployed, downloads or users to date

5000 units distributed as of 2013.

Performance & use

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Deactivation mechanism

Primary water purification method

Solar UV radiation

Energy source

Sunlight

Manufacturer-specified water treatment rate (L/hr)

Manufacturer-specified water treatment rate, measured in liters per hour

Once WADI and the nearby water has received sufficient UV radiation, the sad face will turn happy along with 4 constant progress bars.

Bacteria reduction

Laboratory-evaluated log scale removal rate of bacteria

6 log

Virus reduction

Laboratory-evaluated log scale removal rate of viruses

3 log

Protozoa reduction

Laboratory-evaluated log scale removal rate of protozoa

Unknown

Heavy metals and/or arsenic reduction

Reduction levels of heavy metals and/or arsenic through this treatment system

Unknown

Maximum recommended influent turbidity level (NTU)

Manufacturer-specified maximum level of inlet turbidity (NTU)

30 NTU

Effluent turbidity levels (NTU)

Range or value of outlet turbidity levels (NTU)

Does not reduce turbidity

Safe water storage capacity (L)

Is there safe water storage integrated into this product?

None

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

Product schematics Design and assembly illustrations

Technical support Technical support provided by

Contact the manufacturer

Replacement components Availability of replacement components (in-country, by order,...)

Not available

Lifecycle Disposal and warranty

Minimum two years based on normal handling.

Manufacturer specified performance targets Designer / Manufacturer specified targets

WADI is free of any toxic substances and does not change the taste or appearance of water.

Vetted performance Findings of manufacturer evaluations or independent testing centers

WADI has been tested in various independent laboratories across Europe, Africa and Asia. SODIS technology is developed by ETH Zurich.

Testing organizations Independent lab, academic research centers, etc.

One of the research teams of BOKU scientifically certified the applicability of WADI.

Safety Potential hazards / risks related to operation of this product

Some basic safety measures are:

SODIS cannot be used for water with turbidity higher than 30NTU, polluted with water or harmful chemicals.
Only PET bottles are recommended for the use of WADI and SODIS.
Use of corrugated iron sheet for SODIS is highly recommended for better performance.
Regular cleaning of the solar cell and UV sensor is required to gaurantee adequate energy supply and correct measurements.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

Methods or techniques to remove turbidity, metals and harmful chemicals from water.

Research & standards

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

There is no academic research on the WADI system. However, an overview of research on solar disinfection (SODIS) is available here.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

WADI follows the WHO Guidelines for safe drinking water.

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

Another evaluation report carried out by Agency of Cooperation and Research in Development (ACORD) in Uganda is available.

Other information

WADI gallery images

WADI video

FAQs

By reducing the use of firewood to disinfect water, WADI leads to significant CO2 reductions.

Feedback

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

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WADI Solar Disinfection System

Helioz

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In context photographs (0)

In context files & documents (0)

Feedback from users, customers & distributors