InTeh offers a huge variety of chemical products and equipment needed for wastewater treatment.

According to the process of formation, wastewater can be divided into industrial and sewage, while the formation processes can be physical, chemical or biological.

InTeh offers optimal solutions for complete water treatment processes, which subject to all prescribed European norms.

• pH neutralization: controlled addition of acids/bases
• control of oxygen content in aeration basins of sewage plants
• controlled dosing and reduction/oxidation of decontamination substances in the process with contents such as chromate and cyanide
• phosphate precipitation: dosage of iron (III) chloride
• optimal flocculation of the present pollutants: by dosing polyelectrolytes
• removal of the present pollutants by gravity filtering
• separation of water from sludge by dosing polyelectrolytes
• reverse osmosis desalination
• measuring the content of residual disinfectants before releasing the treated water back into nature

In the food industry, raw water is increasingly used, and its treatment depends on its quality at the beginning of the process.

In case the water is highly polluted; filtration, separation of biomass in a bioreactor, and most often reverse osmosis are required. Municipal water must also be sterilized, for which chlorine dioxide is most often used, which prevents the formation of bacteria in the water.

For less polluted water, or when high quality treated water is not required, only ozone or chlorine dioxide disinfection is applied. This method is profitable and enables savings and return of invested funds in record time.

Heating water has a large role in smooth functioning of the steam generator. Given that generators are in use 24 hours a day, interruptions in operation can be avoided by properly preparing water for heating.

InTeh provides complete systems for treating water for heating.

First, it is necessary to remove salts and gases from the water with thermal processes. The water evaporates, leaving a high concentration of substances in the remaining water, which have a corrosive effect on the materials from which the boiler is made of and create sediments on the walls. By checking and limiting the formation of salts in the heating water using chemicals, such problems can be successfully avoided.

Most often, heating water is treated with following chemicals:

• hardness stabilizers
• deflocculation agents
• corrosion inhibitors
• oxygen binding agents (e.g., hydrazine)
• pH regulators (caustic soda, ammonia)
• anti-foaming agents

Dosing of those chemicals into the heating water reservoirs is achieved with dosing pumps.

The increase in salinity of the heating water is monitored through conductivity.

The desilting valve opens and water drains from the boiler. Water for heating with a low salt content is added to replace the discharged water and thus reduce the conductivity. Part of the heating water is passed through the cooling before testing the conductivity to avoid the temperature exceeding. To reduce water loss through sampling, samples can be taken periodically using a motorized valve.

Many water cycles in various application fields require a low degree of mineral content in the water and low conductivity. To achieve these features, reverse osmosis and water softening are applied.

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