The clean drinking water in rural areas is normally provided by public water treatment plants, which recover untreated water from dams or pumped water from rivers.
Even today, many rural areas, especially villages in the most remote areas of developing countries, are deprived of water from these sources due to their remoteness and geographical location.
However, water is never far away, so what is needed is to treat water in order to supply these areas more or less populated using a system that is both reliable and economical.
WT.International®, in collaboration with its partners, has experimented a rural water disinfection system, able to effectively meet the requirements mentioned above, associated with traditional technologies.
Water sources in rural areas are essentially natural, identical or very similar to those in the images below:
The drinking water disinfection system is simple, practical and does not require the construction of complex structures or the installation of sophisticated equipment.
1. The water from the different sources seen in the photos above, is filtered using simple sand filters, see the following diagram:
2. Once the water is filtered by the sand, it undergoes disinfection by our system in two possible ways:
a. First method: using of the injection system of An-Eco® live.
b. Second method: using of An-Eco® in a storage tank for distribution to the network.
In our installation, an RDX meter (Redox) is provided to monitor the quality of the disinfection and a brine tank is also planned for the production of An-Eco from the eLisy system.
IWT® can treat water wherever electricity is available to supply rural population with drinking water that fully complies with WHO quality standards (World Health Organization), without any volumetric limit to be treated.
DESSALEMET BY REVERSE OSMOSIS
In order to meet the desalination requirements of its customers, WT.International® decided to offer new reverse osmosis systems without the use of chemicals, installed in containers, with a production capacity adapted to the needs.
THE COURSE OF THE PROCESS (PRE-TREATMENT)
Reverse osmosis desalination must be carried out in order to guarantee the minimal turbidity conditions and eliminate suspended or other bodies (eg algae).
For the filtration phase, the use of a series of qwartz filters designed in vitro-resin is planned.
Pre-supply pressurization: For pressurization two parallel pumps are provided, positioned on the pre-supply skid with alternating operation.
REVERSE OSMOSIS DESALINATION
After safety pre-filtration with 5 micron filters that use cartridges PP fiber, the liquid is sent in the filtration phase on semi-permeable membranes, where the water will be pressurized to about 64 bar, in order to obtain a stream of filtered water. The energy required for the process is provided by centrifugal or piston pumps, constructed with all parts that are in direct contact with the sea water, made of duplex stainless steel, equipped with an energy recovery system of the latest generation.
Two dosing stations, one is anti-scaling and the other is anti-oxidant, they help preserve the membranes.
All hydraulic components of the high pressure line are made of duplex stainless steel. The membrane containers are made of fiberglass and maintain a pressure higher than the expected operating pressure of 64 bar. The low pressure circuit is made of rigid PVC pressure tubes.
The installation is designed with an energy recovery system of the latest generation that allows direct energy transfer from the high-pressure concentrate to equivalent volume of saline water at the inlet.
This technology, combined with membranes that have reduced pressure losses and high efficiency pumps, provides a considerable reduction in energy consumption. This solution guarantees the saving of at least 50% of electrical energy absorbed (the pressurization system will have power input of about 130 kW).
The flow volume of the membranes will be automated and programmable with the use of water that is previously “osmosed”. The system includes automatic valves for the proper management of the flow, which are themselves controlled by the PLC, and with the use of the pre-supply pump, will take directly to the reverse osmosis water tank.
Management and control:
The water desalination system is followed by an electrical board with control and management units (touchscreen) and a modem for remote control and programming. Instrumentation control of different flow rates and pressures will be achieved with transducers that allow digital reading and monitoring.
ELisy disinfection system:
The new eLisy water disinfection system provides clean, perfectly clear water with algaecide and flocculant actions that reduce all types of bacteria to 100%, including legionellosis. All is done 100% naturally.
ELisy units are designed to locally produce cleaning, disinfection and sterilization systems using 0.05% – 1.0% brine solutions (NaCl o Kcl). The units electrolyze salt water using ceramic or polymer membranes that separate positive and negative ions. The result of these electrochemical reactions is the production of several types of activated solutions. The goal is to eliminate pathogens such as bacteria, viruses, spores, molds and fungi, as well as the cleaning and removal of some of the heavy metals present in the water.
In recent years, however, the emergence of multi-resistant strains of bacteria, the discovery of legionellosis, and other problems associated with chlorinated compounds have driven research into new and more effective technologies for water disinfection. The technologies of WT.International® have enabled the electron-activated production of the An-Eco (HClO) for the elimination of pathogens. They produce hypochlorous acid also composed of hypochlorite ions from natural sodium, with a real reduction of DANGERS, COSTS and ENVIRONMENTAL IMPACT.
• Easy and safe to use
• Effective: reduced contact time for sterilization
• Biodegradable liquids
• Operational processes provide safe and fast benefits.
The strength of An-Eco Neutral (HClO) in terms of concentration of active sodium hypochlorite (chlorine) can be regulated according to the need thanks to a programming provided in the production machine. A flow regulator is installed in the hydraulic part to stop the eLisy unit in the case of water supply failure and causes the machine to reset when the hydraulic flow arrives.
An on / off switch with a power indicator allows to stop or reactivate the eLisy unit manually. There are several basic models ranging from 20 to 10,000 l / h and the production capacity will therefore vary according to the required need.
The An-Eco (HClO) produced by WT.International® is placed in a storage box and then injected into the water system as needed.
The dosing schedule will depend on the flow and quality of the water and will be controlled by a flowmeter connected to a dosing pump.
Based on extensive studies, the An-Eco (HClO) solution:
• Is ecological;
• Has no toxicity to humans, animals and nature;
• Is a powerful biocide;
• Is safely disposed of in the sewage system
• Has very fast biocide contact reaction;
• Can be used in all stages of disinfection and cleaning;
• Not to disperse on any type of surface without a possible recommended dosage;
• Can be applied to liquid substances, be they hot or cold, on ice and again as a spray:
• Is hypoallergenic;
• Is produced in-situ (on the spot) to eliminate the storage and handling of chemicals.