HEALTH AND SANITATION
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abrasion and re-contamination
• Natural oxidation does not impair efficacy
3. Safe to use
• Not harmful to people or the environment
(sustainable and ‘green’)
• Inherently antimicrobial, no chemicals added
• Completely recyclable.
1.
4
2.
3.
4.
This should be enough to digest for this issue, as there is
much to read in Part 2. PA
Antimicrobial brass door
handle fitted within health care
buildings.
Antimicrobial brass mixer for
health care built environment
applications.
Antimicrobial paraplegic grab
rail for paraplegic installations.
An example of antimicrobial
copper overtable in a hospital
ward bathroom.
Legionella control with
chlorine treatment
Chlorine and chlorine-based compounds are disinfectants that can
serve the dual role of efficiently inactivating microorganisms during
water treatment, as well as maintaining the quality of the water as it
flows from the treatment plant to the consumer’s tap.
By By Environmental Protection Agency, document EPA 810-R-16-001
Numerous studies have demonstrated that chlorine
effectively kills many disease-causing bacteria and
other pathogens (McGuire, 2006).
Chlorine is added to drinking water as elemental
chlorine (chlorine gas), sodium hypochlorite solution
or dry calcium hypochlorite. Due to safety issues with
chlorine gas, many US water systems have switched to
sodium hypochlorite for disinfection (McGuire, 2006).
Chlorine can be applied by facilities for routine treatment
of both hot and cold domestic water; it can be applied to
www.plumbingafrica.co.za
the cold and hot water tanks, or to the entire distribution
system. However, free chlorine degrades rapidly in hot
water systems (Health Protection Surveillance
Centre, 2009).
Chlorine can also be used at high doses for emergency
disinfection of potable water systems through shock
chlorination (also called shock hyperchlorination). For
chlorine to be effective against microorganisms, it must
be present in sufficient concentration, and must have
adequate time to react.
Continued on page 31 >>
November 2017 Volume 23 I Number 9