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Department of Technological Projects

Water Air and Gas Treatment and Purification division

Production and delivery of "turnkey" building structures for civil and industrial purposes - wastewater treatment plants, water treatment and desalination equipment. Maintenance and training.

Wide range of products is used in treatment of wastewater from residential houses, cities, hospitals and for cleaning in various industries such as:

• automotive,
• woodworking,
• furniture,
• paper,
• food processing,
• construction,
• engineering,
• textile etc.

 

Water preparation processes

Water preparation processes comprise a wide range of technologies and physical-chemical methods. Methods must be selected with a view to the purpose of the use of the prepared water – the preparation of potable water requires a different approach from, e.g., the preparation of cooling water, feed water for boilers, or process water.

Application of methods

In the process a wide range of physical-chemical methods can be used, e.g.:

• Coagulation, flocculation, sedimentation – elimination of turbidity and colloid substances
• Filtration – mechanical filters to remove rough particles, sand filters
• Membrane processes – ultra-filtration, nano-filtration, reverse osmosis
• Ion exchanger technologies – softening, removal of NO3 –, dealkalization, production of demineralised water
• Adsorption – arsenic removal, active carbon to remove foul odours and tastes
• Degasification – reduction of oxygen, CO2, and radon (mostly groundwater) content
• Oxidation, reduction – Fe removal, chlorination to reduce microbial propagation.

Applications

• Potable water preparation plants for municipalities, waterworks companies – refurbishment, intensification
• Preparation of very clean water – e.g., electrical industry, pharmaceutical and food-processing industry, feed water for boilers
• Groundwater processing plants – in places where connection to the public distribution network is not possible
• Rinsing water – glassworks, automotive industry, electrical industry, plastic production
• Cooling water

Air treatment

Works conducted in wastewater treatment plants and in many industrial buildings and facilities bring about a risk of problems connected with objectionable odours. In past, cumbersome odours from biological processes were liquidated by the use of biological filters. How-ever, operations of such bulky filters are not reliable and they are expensive. At present, there are in place reliable physico-chemical processes using ionisation or photocatalytic re-actions for treatment of tail gases.

The physico-chemical methods are highly efficient and suitable for removal of objectionable odours of gases, such as H₂S, NH₃, (CH₃)₂S or VOC (volatile organic compounds).

Completed projects

• TBG METROSTAV s.r.o. -  Prague, Czech Republic
• SIA Papīrfabrika -  Ligatne, Latvia
• Dextra Manufacturing Co.,Ltd. -  Bangkok, Thailand
• Gordon Prod -  Biseritsani, Romania
• ABB s.r.o. -  Prague, Czech Republic
• CWS-boco Slovensko, s. r. o. -  Bratislava, Slovakia
• VESUVIUS ČESKÁ REPUBLIKA, a.s. - Ostrava, Czech Republic