Fogging and Fumigation

• Both process used for controlling of microorganism.
• Fumigation activity banned by different regulatory guidelines because negative effect(causing of irritation to the eyes, nose and skin) .

Fogging

• Fogging is a technique.
• This technique used for killing of microorganisms.
• Which is directed by a blower and vaporized spray.
• This process require fogging machine and fogging solution (Fumigant).
• By these fogger machines solution is sprayed in the area in form of aerosol.
• The small particles of disinfectant solution suspend in the air for long time and kill all the air borne bacteria,fungus and their spores.
• This is very effective way to control the contamination.
• The recommended ULV (Ulta Low Volume)fogger used for fogging. 

• Fogging purpose Hydrogen peroxide vapor or Virosil is better.
• Fumigant valid 6% Hydrogen peroxide, 10% Hydrogen peroxide and 20% Hydrogen peroxide used for better controlling of microbes.
• Virosil (mixer of Hydrogen peroxide 10% and Silver Nitrate 0.01%Approximate pH 1.5).
• Market available different brand names.
• Fogging is safer activity.
• Defogging is not necessary.  

Fumigation:

• This method used for Formaldehyde solution and Potassium permangnate chemicals.
• These method generate the fumes and effectively kill the bacteria, fungi and spores.
• This is very effective method for controlling the microorganisms.
• These chemicals are carcinogenic because cause to irritation,to the eyes, nose and skin.
• carcinogenic means cancer causing or risk of cancer.
• It is not safer for the personnel who is handling this chemicals.
• After completion activity defumigation is required at least 6 hours.

operation :

• Before stating the Fogging/ Fumigation activity Keep the area Under Fumigation/ Fogging.
• Stop the AHU Up to Closing the Fumigation/ fogging activity.
• After completion of the activity continuously circulate the AHU (Air Handling Unit)at least 6 hours.
• Frequency : Fortnight  or whenever expose the cultures.

How to calculate the Area Volume:

• Area length x Width x Hight

Calculation total qty of liquid

=   liqiud (ml) = volume X applicatio rate (800ml/ 1000 cubic meter(M³)

=     1464 X 800/1000 = 1171 ( 1200 ml)

Calculate Foggining Time:

=    total liquid / flow rate

=   1200/ 70 = 17.14 minuts (20 minuts)

•   application rate based on the fogger/fumigator flow rate.

How to calculate the hydrogen peroxide percentage:

 1000/ 30 % H2O2  X 6% = 200

=1200/30 % H2O2  X 6%

=240