Page 59 - FACOT CHEMICALS - LINEA COMFORT

Air systems treatment guidelines

osmotized or dermatologically on sensitive skin, Main microorganisms Concentration ppm Contact time
oral mucosa, corneal cells, nasal epithelium and (parts per million) or mg/l
alveolar cells. Active chlorine released from hypo- Aspergillus fumigatus 200 60 seconds
chlorous acid is not listed in any group of substan- Bacillus cereus (spore) 200 5 minutes
ces monitored and no specific occupational expo- Escherichia coli 100 30 seconds
sure limits have been identified. In the context of Legionella pneumophila 25 60 seconds
water treatment, for the dosage of the product at Pseudomonas aeruginosa 500 10 minutes
the injection point, the spontaneous loss of active Candida albicans 100 60 seconds
chlorine and that resulting from the concentration in Salmonella Tiphimurium 100 60 seconds
water of the species from oxidize: organic substan- Streptococco faccium 100 60 seconds
ces, microorganisms, ferrous and manganese ions Staphylococcus aureus 93 60 seconds
and other components. For this reason, the dosage Salmonella choleraesius 500 10 minutes
500
10 minutes
Canine parvovirus
of the product at the injection point is on average Proteus vulgaris 100 60 seconds
0.1% corresponding to 1 ml of pro-duct per litre of Fig. 1 – Report on the antimicrobial efficacy of chlorine dioxide
treated water (approximately 0.3 ppm). The residual
concentration of the product can be identified by a it does not produce known halomethanes, and has
common test for the cleaner nation of free chlorine. the advantage, unlike chlorine, of not being volatile
In the case of shock sanitation, the product is fed at high temperatures. Chlorine Dioxide is interna-
into water until the concentration of residual free tionally recognized as a water purifying agent and
chlorine of 20-50 mg/l is reached throughout the therefore able to neutralize also the Vibrio Chole-
plant, including distal points. After a period of con- rae (cholera) in addition to many microorganisms.
tact of 2 hours, with 20 mg/l of active chlorine, or 1 The concentrations to use vary depending on the
hour, with 50 mg/l of active chlorine, allow the water type of disinfection to be carried out and on the
to flow into the plant until the level of chlorine does degree of contamination of the water (see the table
not return within the concentration limits established in Fig. 1).
by current regulations (0.2 ppm). In this period of
time, it is absolutely necessary to avoid the use of
the utilities involved in shock sanitation (it is appro-
priate to affix special signs).

Chlorine dioxide

The stabilized solutions of Chlorine Dioxide
WL-SANIFAST are a powerful and effective broad
spectrum bactericidal, virucidal and fungicidal oxi-
dizing agent able to neutralize also sulphates and
other harmful or toxic substan-
ces. WL-SANIFAST is a stable
product, safe when used in com-
pliance with the activation and
the instructions for use, and it is a
very effective alternative to chlo-
rine or hypochlorite, as it does
not has the disadvantages entai-
led by the latter. Unlike the latter,
this product does not release bad
odours, has an excellent residual
activity and, most of all, does not
act by chlorination but by pene-
trating the cell wall of bacteria
and eliminating pathogens. It’s
much more It is much faster than
traditional systems such as gluta-
raldehyde or quaternary salts, it
is stable in a very wide pH range,
and it is also able to attack and
break up the Biofilm; furthermore,

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