07-27-2012, 02:38 AM
I have not done any literature research in a few years about hot water treatments but this is what I got several years ago.
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]A NZ Biosecurity evaluation demonstrates that Didymo can be killed by submersion in water heated to 60ºC ( 140ºF) for 1 minute or 20 minutes at 45ºC ( 113ºF) of submersion. This is for none porous items that do not absorb water.[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]For boots with felt soles or other soft absorbent materials it takes full submersion in hot water for 40 minutes , at least 104ºF (40ºC). With using 5% dish detergent in the water then you can get away with 104ºF for 30 minutes. Note that 5% means 6.5 fluid oz. (over 3/4 cup) of dish detergent for each gallon of water. One needs to validate the temperature of the water was maintained through the whole process. Other soft items that absorb water will require similar treatment. Examples of these soft items would be leather uppers on boots etc. web straps, soft fabrics of boots, shirts, socks[/size][/font]
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[font "Verdana, Arial, Helvetica, sans-serif"][size 2]A person can with some pain keep their hands in 104ºF water. At 140ºF the water is too hot for the hands to remain submerged. Thus if you can keep your hands in it then it isn't hot enough.[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]For NZMS this is what the Oregon Sea Grant organization published in 09:[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]"Soak gear in a bath of hot water (at least 120°F, 46°C) for 10 minutes.
This method is not advised for Gortex."
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[font "Verdana, Arial, Helvetica, sans-serif"][size 2]A NZ Biosecurity evaluation demonstrates that Didymo can be killed by submersion in water heated to 60ºC ( 140ºF) for 1 minute or 20 minutes at 45ºC ( 113ºF) of submersion. This is for none porous items that do not absorb water.[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]For boots with felt soles or other soft absorbent materials it takes full submersion in hot water for 40 minutes , at least 104ºF (40ºC). With using 5% dish detergent in the water then you can get away with 104ºF for 30 minutes. Note that 5% means 6.5 fluid oz. (over 3/4 cup) of dish detergent for each gallon of water. One needs to validate the temperature of the water was maintained through the whole process. Other soft items that absorb water will require similar treatment. Examples of these soft items would be leather uppers on boots etc. web straps, soft fabrics of boots, shirts, socks[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]
[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]A person can with some pain keep their hands in 104ºF water. At 140ºF the water is too hot for the hands to remain submerged. Thus if you can keep your hands in it then it isn't hot enough.[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]For NZMS this is what the Oregon Sea Grant organization published in 09:[/size][/font]
[font "Verdana, Arial, Helvetica, sans-serif"][size 2]"Soak gear in a bath of hot water (at least 120°F, 46°C) for 10 minutes.
This method is not advised for Gortex."
[/size][/font]
[signature]