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Sistema autónomo para purificación de agua salobre directamente alimentado por energía solar fotovoltaica sin utilizar baterías

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOES20150903001
Publicado:
19/10/2015
Caducidad:
18/10/2016
Resumen:
Un grupo de investigación español ha desarrollado un sistema autónomo para la purificación de agua salobre mediante electrodiálisis directamente alimentado por una planta solar fotovoltaica sin utilizar baterías. El sistema reduce los costes de inversión y mantenimiento y puede utilizarse en agua procedente de diversas fuentes, especialmente en áreas aisladas. Las características de las fases de preacondicionamiento y postacondicionamiento dependen de las características fisicoquímicas del agua (pozos salobres, agua de mar, plantas de tratamiento de aguas residuales o industriales, etc.). El sistema puede incorporar técnicas de filtración y desinfección. Se buscan empresas interesadas en la aplicación industrial de la tecnología para establecer acuerdos de licencia o cooperación técnica.

Details

Tittle:
Stand-alone system for the purification of brackish water directly powered by photovoltaic solar energy without using battery
Summary:
A Spanish research group has developed a stand-alone system for the purification of brackish water by electrodialysis directly powered by a photovoltaic solar plant. The system reduces the investment and maintenance costs and can be used in water from different sources, particularly in isolated areas. The researchers are looking for companies interested in its industrial application via license agreement and/or technical cooperation agreement.
Description:
Nowadays, water scarcity is a great challenge for world´s population, particularly in those regions where the access to water and electricity is expensive or non-existent. In these areas, it is essential to use water from aquifers, most of them overexploited and contaminated with dissolved salts.

Among the known technologies, electrodialysis has been widely used in water desalination. Moreover, the combination of the electrodialysis with other techniques can be used to produce treated water suitable for various uses as drinking water, irrigation, flushing or others.

On the other hand, photovoltaic solar panels have already been used in electrodialysis desalination processes. However, most of these systems use battery racks for energy storage or use inverters to transform it into alternating current (AC) increasing the investment and maintenance costs and decreasing the efficiency of the process (direct current to alternating current conversion).

A Spanish research group has developed a stand-alone system for the desalination and disinfection of water by electrodialysis and the pre- and post-conditioning steps. The system is directly powered by a photovoltaic solar plant without using battery racks.

The system comprising a desalination and disinfection water unit composed by:

i) Water collection system by pumping, conditioning of water (pre-treatment) and storage in a tank.

ii) Water desalination system by electrodialysis comprising pumping equipment and electrodialyzer.

iii) Water disinfection system (post-treatment) comprising pumping equipment.

iv) Photovoltaic solar field.

v) Power processing system.

vi) Automation and control system.

The characteristics of pre- and post-conditioning stages depend on the physicochemical characteristics of these waters (brackish water wells, seawater, sewage or industrial wastewater treatment plants or others). The system may incorporate filtration and disinfection techniques.

The desalination process can be carried out for any type of electrodialysis (batch with recirculation, continuous modes, electrodialysis reversal, etc).

The power supply subsystem is a field of photovoltaic solar panels as discontinuous energy source.

The system has several subsystems that require electric power with different voltage/current characteristics. However, during the treatment process not all the subsystems require energy simultaneously. Therefore, the system allows strategies to reduce the requirements of electric power and adapt it to the amount of energy available anytime.

The system is compatible with a mixed power, so that it may combine the use of solar power with a conventional power grid when the discontinuous power source is insufficient.

The system is highly flexible, so that its configuration strongly depends on the application of the treated water. The associated costs determine the equipment and the most suitable configuration.

The researchers are looking for companies interested in its industrial application through license agreement and/or technical cooperation agreement in order to adapt and implement the technology to company applications. Potential customers could be; industrial developers of water treatment systems, consulting and engineering companies in the environmental sector, food and industrial companies, irrigation communities, housing developments, inter alia.
Advantages and Innovations:
· Allows the autonomous desalination, disinfection and purification of water in remote locations isolated from the mains.

· Is sustainable and environmentally friendly. The process is free of CO2 (carbon dioxide) emissions and does not contribute to climate change.

· Substantially reduces the investment cost and the amortization between 10-20% of these systems by eliminating the high cost of batteries, regulators and inverters.

· Reduces maintenance time and costs between 50-70% by avoiding the use of batteries. Also avoids economic and environmental costs associated with the disposal of spent batteries.

· Can be applied to the desalination of water coming from different sources such as seawater, brackish well water, sewage or industrial wastewater treatment plants or others.

· Has a high availability allowing the accumulation of treated water for periods of failure of the renewable energy sources

· Improves the efficiency of use of the electric power generated by not using batteries or change to AC (alternating current) power, thus avoiding the energy losses associated.

· Allows implementation of operating strategies of the various subsystems, adapting them to the amount of energy available at all times and improving the energy efficiency of the system.

· Allows a mixed feed of different renewable energy sources, being possible the combination with conventional electricity grid when the first are insufficient.

· Is very flexible and can adapt its dimensions and characteristics depending on the requirements, application and specific characteristics of the water to be treated.
Stage of Development:
Prototype available for demonstration
IPs:
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
This technology is protected by a Spanish patent application.

Partner sought

Type and Role of Partner Sought:
- Type of partner sought: Enterprises.

- Specific area of activity of the partner: industrial developers of water treatment systems, consulting and engineering companies in the environmental sector, food and Industrial companies, irrigation communities, golf courses, housing developments, inter alia.

-Task to be performed: Licensing the invention for its exploitation and technical cooperation (testing application, adaptation to specific needs, inter alia).

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
French
Spanish

Keywords

Technology Keywords:
10004004 Agua potable
02004 Diseño de planta y mantenimiento
10004 Gestión de aguas
04007001 Gestión de la energía
04005004 Photovoltaics