WASTE WATER TREATMENT
With the increasing pressure on water resources, the concept of beneficial use of treated waste water has quickly become a requirement for water agencies around the world. Recycling and reusing water and waste water are increasingly incorporated into planning and development in all countries, especially for soil irrigation and agriculture. That is to protect public health, increase the availability of water, prevent coastal pollution and improve water resources and reinforce nature protection policies.
Why recovering water?
The landfill site is often very expensive> € 5.00 per M3. The industry is aiming for a gap ratio of 2 kg and 1 kg of input. This in most cases is not reached! The average is> 3 output and 1 kg input. By REDUCING AND RECYCLING water with An-Eco® along with reducing waste, money is saved!
Advantages of An-Eco® compared to traditional methods.
• Solutions accepted and approved;
• In situ production on demand and on need;
• Significant energy saving;
• Significant savings of activated carbon;
• Reduced installation costs on civil works;
• Autonomous and automated systems.
With the introduction of WT.International®’s An-Eco® generators, it is possible to design relatively simple wastewater treatment technologies to provide low-cost sanitary services and protect the environment while offering additional benefits related to the reuse of water.
WHY IS WT.International® WATER DISINFECTION TECHNOLOGY BETTER
THAN TRADITIONAL CHLORINATION?
Although apparently similar to chlorine, An-Eco® is unique and obviously superior to sodium hypochlorite for the destruction of spores, bacteria, viruses and other pathogens on an equal residual basis.
Sodium hypochlorite in 5% concentration is effective only in disinfection, not in sterilization. Sodium hypochlorite gives negative results, for example against cysts (Guardia, Cryptosporidium);
Most pathogens, especially those that are transported by water, develop strong resistance to sodium hypochlorite over time. The use of An-Eco®, as a daily water disinfectant for more than ten years, has shown that microorganisms do not develop resistance to An-Eco® over time.
The contact time required for An-Eco® is lower than all commonly used chemical biocides on the market today, for example sodium hypochlorite, which loses its biocidal characteristic when stored for long time and it represents a potential danger of emission of chlorine gas during its conservation.
An-Eco® is better and has superior characteristics to sodium hypochlorite, even after dilution, and the bactericidal efficacy remains at a pH of between 5 and 7,2.
An-Eco® is slightly corrosive (when it is in a more acidic pH form) mainly because of the low concentrations of hypochlorite ion and, moreover, because of the elimination of the caustic element normally present in sodium and calcium hypochlorite.
The reaction between An-Eco® and the organic materials present in the water does not
produce the trihalomethanes such as chlorine.
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 W.T.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 W.T.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.