Municipal Drinking Water
Drinking water - the most important provision on our planet. But not all drinking water is naturally suitable for human consumption. Apart from course pollutants, far more dangerous pollutants frequently crop up: Viruses, bacteria, parasites or other micro pollutants which cannot be removed with simple filtering technologies. These dangerous companions can be rendered innocuous in an environmentally friendly manner with the WEDECO UV and ozone technologies.
The great advantage of UV light and ozone in comparison to other techniques is in the environmentally friendly way in which both technologies work. No health-endangering by-products are formed in the water and the natural taste and smell of the water is also preserved.
Ultraviolet light disinfects without chemicals
The use of chlorine, chlorine dioxide, hypochlorite and other chemical substances for the disinfection of drinking water can entail health-related and ecological disadvantages due to the formation of chemical by-products. Besides, some dangerous pathogens such as Cryptosporidium and Guardia are already very resistant to chemical disinfection techniques.
Disinfection with UV light works better: Microorganisms are inactivated by a photochemical reaction between the UV-C radiation and the genetic information carrier (DNA) of the pathogen within seconds. The pathogen cannot multiply anymore and dies. Since this is a purely physical technique, the pathogen types cannot become resistant to the UV radiation in addition. The WEDECO UV technology can thus replace the use of chlorine & Co. completely or reduce it to a minimum.
WEDECO UV systems
WEDECO UV systems have been used for over 30 years for drinking water disinfection. The WEDECO UV service portfolio stands out for its extensive product range for the most varied requirements. Whether a remote settlement or a busy metropolis - there is always a suitable WEDECO UV system. In addition, the WEDECO UV technology is extremely efficient. Self-developed, particularly efficient Spektrotherm® low-pressure high-intensity UV lamps and electronic ballasts developed especially for this type of lamp lead to outstanding characteristics in terms of UV performance and economic efficiency.
The advantages of UV disinfection for the water utility
- The inactivation of microorganisms takes place within seconds, even in the case of resistant bacteria, viruses and parasites (e.g. Cryptosporidium and Guardia)
- Replaces or reduces drastically the use of chemicals
- No reactor vessels or secondary pumps
- Technology successfully tried and tested thousands of times
- The technique is low-maintenance and handling is simple
- Low operating costs, if UV low-pressure emitters are used
- Low investment costs
Ozone oxidation in drinking water treatment
The use of ozone is often the only and most effective technology for providing high-quality drinking water. Thanks to the environmentally-friendly way in which it works, it is ideally suited for the sustainable water treatment. As the strongest technically producible oxidising agent, it fulfils numerous “special tasks” apart from disinfection, which cannot be carried out using other methods or only with difficulty:
- Disinfection, i.e. killing of microorganisms (giardia lamblia /virus inactivation/elimination of cryptosporidia)
- Removal of smell (deodorisation)
- Removal of humins (decolourisation)
- Taste enhancement
- Oxidation of iron and manganese
- Degradation of pesticides, pharmaceutical residues and other trace contamination
- Support and partial replacement of flocculants
The advantages of ozone oxidation for the water utility
- No formation of haloforms
- Low ozone quantities are necessary
- No environmental or health-endangering by-products
- pH insensitivity
- Ozone is produced according to needs at the place of consumption from energy and oxygen/air
- Modern technology with drastically reduced energy consumption/optimised ozone production
The advantages for humans, animals & the environment
- No environmental impact. Ozone disintegrates or is broken down into oxygen after the reaction
- The water keeps its natural taste and smell
- No formation of harmful by-products
Matching WEDECO UV systems
- Compact and high-output UV system for small drinking water applications
- Certified acc. DVGW / ÖNORM
- Efficient UV system for disinfection of up to 1.480 m³/h drinking water
- Certified acc. DVGW and ÖNORM
- Compact UV system with highest adaptability
- Drinking water disinfection of up to 2.200 m³/h
- UV disinfection for liquids with low UV tranmittance
- Flow-rate up to 1.335 m³/h
- Highly compact medium pressure UV system
- Validated acc. to US EPA UVDGM
- Efficient UV disinfektion for urban drinking water supply
- Flow-rate up to 6.300 m³/h
- Reference measurement device for UV disinfection systems
Matching WEDECO Ozone systems
- Customized ozone system for large capacities ozone
- Ozone production from 14 kg/h to more than 300 kg/h per unit
- Compact „plug & play“ ozone system for middle-sized ozone capacities
- Ozone production from 200 g/h to 25,000 g/h per unit
Engineered Solutions
Xylem’s pre-engineered AOP concept WEDECO MiPRO™ is based on three key components: Ozone, Hydrogen Peroxide and UV light. By combining these technologies, flexible solutions for individual requirements are given.
The experience of many years building containerized systems enabled Xylem to engineer optimized WEDECO systems with the best possible arrangement to meet the customers needs.
Xylem Expertise
The elimination of micro-pollutants from our water is a challenge which more and more responsible providers and disposers have to set themselves. While biological treatment processes do not remove them completely, oxidation with ozone is proving to be one of the most efficient methods.
