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KREVOX European Environmental Centre
00-680 Warsaw, Żurawia 45n str.
tel. +48 22 756 52 20,
fax. +48 22 756 50 33

Chemical disinfection

Oxidizer Mixture Disinfection (BSD-M)

Disinfection systems that have been used for many years, based on chlorine gas or sodium hypochlorite pose a series of technical problems , and the most important ones are a threat to the natural environment

An alternative, allowing to eliminate all existing problems is the implementation of the newest BSD-M technology:

  • having access to a cell, water, kitchen salt and direct current, one can produce its own disinfecting agent with safe chlorine concentration
  • the disinfecting mix consists of strong oxidizers with a large chlorine, chlorine dioxide and ozone content
  • BSD-M systems can function autonomously or grouped in parallel systems.

 

 The effectiveness of disinfection using BSD-M is many times higher comparing to chlorine and hypochlorite, especially in relation to:

  • Cryptosporidium
  • Giardia
  • cholera virus
  • Hepatitis - Coli virus

 

 BSD-M METHOD ADVANTAGES

 Absolutely safe for humans (no danger zones need to be determined)

  • Environmentally-friendly (no need to deliver and store dangerous substances)
  • More effective than chlorine in removing bacteria, viruses and parasites
  • Creates 20--50% less THM
  • Easy and fast implementation - cheap to use and easy to operate

 

Chlorine Dioxide Water Disinfection

Chlorine dioxide is made in-house in the chlorite/hydrochloric acid process (or the less frequently used chlorite/gas chlorine). It consists in mixing - in the right proportions - both solutions, while maintaining the correct contact time.

Chlorine dioxide is a pretty good disinfecting agent - if we look at it only from the point of view of the disinfection process effectiveness. It does not create trihalomethanes, helps remove smell and taste from the water, does not react with ammonia or other nitrogen compounds. Better than chlorine (with identical concentration) destroys bacteria and viruses, and the anti-bacteria action is almost constant - for the water pH value from 6 to 9.

Chlorine dioxide does not lose its qualities in water: its useful dose, remaining after the completion of the oxidation process, remains in water for a long time. In case of long water-line networks, it may reach its ends, which prevents further water contamination. It is useful especially where the water reaching the end-user time is extremely long.

When talking about the advantages of using chlorine dioxide one has to also mention its tiny exploitation flaw: implementation of this disinfection method may solubilize and wash away the sludge already present in the network.

Chlorine Gas Water Disinfection have the relatively low operational cost.

Using chlorine gas has, however, a risk of a natural disaster. Other drawbacks of this disinfection method are the necessity to determine safe zones, transporting and storing chlorine tanks, high operational regime and having to use neutralization methods. The disinfection installation cannot be located in a populous area.

The higher than normal costs and low safety - these are the reasons for this oldest disinfection method to find less and less advocates. It is superseded by more safe disinfection methods.

 

 


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