System for providing safe drinking water HWM.
HWM is a purification system for providing drinking water.
The HWM stands for Healthy Water Maker, a filtering system which can purify water from a microbiologically and chemically affected sources and turn it into drinking water. It has been developed by Artos Aqua to help solve the problem of safe drinking water in Africa. Although made with the use of advanced technologies its mechanics are very simple and durable. Heavy duty design makes HWM ideal for on-site application.
HWM removes all visible particles, bacteria, viruses and all other substances hazardous to health, yet it leaves all the healthy minerals in the water. HWM is able to clean any type of affection of the water source without exception, thus no prior water analysis is needed.
The HWM system consists of:
- spin down filter
- ultra filtering module
- various filtering media
- UV sterilization
The HWM system features integrated patented filters, which are produced according to stringent NSF and FDA
- chemicals-free preparation of drinking water,
- simple use and maintenance,
- option of combining several filter media depending on the type of affection of the water source,
- option of cross and back washing, which ensures a longer lifecycle,
- optimal performance also under heavy loads.
The system has been tested at the Sanitary Chemistry Department and the Sanitary Microbiology Department of the Institute for Public Health Slovenia.
HWM employs the latest filtering and purification technologies.
Purification of drinking water is a very demanding task and can only be carried out with appropriate technology. That’s why the HWM filtering system has been developed by applying the latest technologies.
The HWM system can purify microbiologically and chemically affected water to the level of purity where water is safe to drink. The system is simple to use, ideal for “on-site” application and does not require an expert to operate it. Water purified by HWM meets the most stringent global health standards.
As a result of the combination of micro filters, ultra filters and special filtering media as well as an UV sterilizer, the HWM filtering system does not remove only visible particles from the water but systematically eradicates bacteria, viruses and removes hundreds of health hazardous substances.
HWM is well suited to provide drinking water in emergency situations.
HWM is a water purification device. It is composed of several interconnected filters encased in small module, which can be transported by a vehicle or manually brought to the site. The system is connected to the electric grid or generator power. Depending on the source of raw water, device can operate in two ways:
- Source of raw water is natural water such as: lakes, rivers, streams, rainwater. HWM uses external pump to ensure adequate working pressure which is necessary for proper functioning.
- Source of raw water is local water supply network. HWM is connected directly to a water supply network without the use of external pump. Water pressure in the network must be at least 3 bar (300 kPa or 43,5 PSI).
WATER CLEANING PROCESS
Multilevel filtration system is composed of centrifugal filter, ultra filter-modules, different filtration agents and UV sterilizer. Treatment of water includes several physical processes and separation processes with a result of removing all the impurities from water. These impurities can be particles or dissolved substances. Mechanical filters stop all bigger particles. Dissolved organic impurities bond with surface of filtration media on the basis of molecular attraction forces. UV rays destroy micro organisms. KDF (Kinetic Degradation Fluxion) is redox agent that removes heavy metals with oxidation reduction.
Disinfection – the last stage in providing drinking water.
The disinfection of drinking water is the last stage in processing water prior to distribution. This procedure represents the elimination or reduction of pathogenic micro organisms in water to levels, when the micro organism content does not represent a potential hazard for infections. The microorganisms which have to be removed or eliminated from the water before its use are: bacteria, spores, viruses and protozoa. The resistance of such organisms varies and depends on the concentration, the disinfection method, type and quantity of the applied disinfection agent, the time of the process and physical as well as chemical properties of water.
DISINFECTION WITH UV-LIGHT
The water disinfection method using UV-light is very effective. The advantages of this type of disinfection are:
- no adding of chemical substances to water,
- prevention of new chemical compounds in water (for example formation of trihalomethane when using chlorine based products). The UV STERILISER applied to the HWM system uses a special bactericide bulb operating at a wavelength of 254 nanometers, the radiation dose is 30,000 microwatt per square centimeter per second.
PROCEDURE OF WATER CLEANING
The ultrafiltering membrane is resistant, thin and selectively permeable, serving as a molecular sieve retaining all molecules, including colloids, micro organisms and pyrogens, larger than 0.01 microns. By using UV rays, high quality of drinking water can be provided with a minimum consumption of energy. The module features an automatic crossrinsing facility, which enables optimum operation of the system even with heavily polluted water. For UV disinfection of water special bactericide bulbs are used, operating at a wavelength of 254 nanometres, while their radiation dose is 30.000 microwatt per square centimeter per second. The UV-rays of this wavelength are very effective in eliminating various bacteria, viruses, algae spores.
The advantages of this type of disinfection are that the water does not require chemical substances to be added in order to prevent the creation of new chemical compounds (as for example the formation of trihalomethanes when applying chlorine based agents).