Let's talk a little about SODIS Solar Water Disinfection Method (Solar Water Disinfection). It consists of the disinfection of water by means of Ultra Violet radiation to prevent diarrhea, which is one of the major causes of death in certain developing countries.
In 6 hours we can have water free of germs, viruses and bacteria. This method like that of desalinate sea water They are very useful in developing countries and after major disasters where the absence of clean water causes fatal diseases.
I do not think, or at least I hope, never have to use this method to drink water, but it never hurts to know these things to avoid diarrhea and other diseases. Also and just as important, perhaps someone who reads this article can help people who really need it.
The SODIS process uses very simple technology to improve the microbiological quality of drinking water. Uses solar radiation to destroy pathogenic microorganisms that cause waterborne diseases.
SODIS is ideal for treating small amounts of water. Clear plastic bottles are filled with contaminated water and exposed to sunlight for 6 hours. Sunlight treats contaminated water in two ways.
On the one hand Radiation in the UVA spectrum (320-400nm)
and on the other hand through the increase in temperature.
If the water exceeds 50ºC, the disinfection process is three times faster.
How to use SODIS
SODIS needs radiation and temperature. The bottle must be exposed for 6 hours if the day is sunny (and if it exceeds 50ºC, one hour of SODIS is enough), if it is cloudy, it must be exposed for 2 days
you need water that is not very cloudy less than 30 NTU a simple way to know if the water is safe, is to fill the bottle and try to read a sheet on the other side.
Plastic bottles are recommended to be made of PET, not PVC. One way to tell them apart is to burn the bottle. PET ignites much faster, PVC is very difficult to burn.
SODIS does not change the chemical quality of the water.
SODIS needs relatively clean water.
SODIS needs certain environmental conditions, which occur between latitudes 15 ° N / S and 35 ° N / S
SODIS is not suitable for treating large quantities of water.
Main mistakes users make and their solutions
Use green or brown plastic containers. These bottles do not transmit ultraviolet well. Use only transparent bottles.
The bottles used are too big. The optimal size is 1 - 2 liter bottles.
Put the bottles upright. The bottles must be laid down horizontally and if it can be on sheet metal or iron to increase the temperature.
After doing the treatment, the treated water is put into another contaminated container so that it becomes contaminated as well. The solution is to use the water directly from the bottle with which the treatment has been done.
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...
I knew of a similar method where the sterilization of water is done in dark painted bottles to kill germs with temperature and not with UV rays
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...
MY AUNT USES THAT METHOD TO DISINFECT THE WATER AND ONLY USES COLORLESS PLASTIC BOTTLES, that is to say, transparent because if it were colored it stops the sun's rays ...