Quick Answer
Solar Disinfection (SODIS) is a method used to purify water using the sun's UV rays. It's simple, low-cost, and effective, making it a priority for water purification.
Choosing the Right Container
Choose a clear plastic bottle with a capacity of at least 1 liter, as this allows the sun’s UV rays to penetrate and disinfect the water. The container should be free from any UV-blocking coatings or materials. Ensure the bottle is clean and dry before use.
Preparing the Water
Fill the container with water to the top, leaving no room for air. This ensures that the water is in direct contact with the UV rays. If the water is cloudy or contains particulate matter, let it settle for 30 minutes to an hour before applying SODIS.
Applying SODIS
Place the container in direct sunlight, ideally in a position that receives full sun for at least 6 hours. If the temperature is above 60°C (140°F), the water can be left in the sun for 2 hours. If the temperature is between 40°C (104°F) and 60°C (140°F), the water should be left in the sun for 6 hours. After the specified time, check the water for clarity and odor. If it appears clear and free from any unpleasant smell, it’s safe for drinking.
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