Solar power kills bacteria in water


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Solar power kills bacteria in water. Scientists have developed techniques of decontamination water with solar power in an effort to reduce the spread of diseases from water in developing countries.

Disinfection of water with solar power is a simple way to kill bacteria in water. This method is used by households in developing countries where the availability of safe drinking water is quite rare. They fill plastic bottles with water and dried in the sun, where the UV radiation and increased water temperature to kill bacteria in six hours. But this method requires strong sunlight and the volume of water that can be sterilized limited.

Sunlight is used to disinfect water in plastic bottles but the amount of water that can be sterilized limited.

Solar power kills bacteria in water
. Kevin McGuigan of The Royal College of Surgeons in Ireland, Dublin, and his colleagues investigated the disinfection of Escherichia coli-contaminated water by using solar power in reactors large volume flow. A water circulating pump between a tank and a glass tube surrounded by a sun catcher, which focuses the sun's energy into the tube. They found that the inactivation of E. coli depends on the total dose of sunlight rather than on the intensity of light. They also showed that these reactors could be ineffective because the bacteria get a dose of radiation is not continuous when these bacteria to flow between the storage tanks that are not exposed to light by the tube are exposed to light. If bacteria are not completely deactivated by sunlight, then the state is not exposed to light will provide time for these bacteria to recover from damage caused by radiation, making them more resistant when irradiated again.

For me, the main significance of this research is that these methods can be effective, but a recount of the flow in the solar disinfection reactor must be carefully designed to avoid the possibility of formation of sub-populations of resistant pathogens that persist due to sun exposure is not complete, McGuigan said.

This study is an important contribution that shows the potential advantages and disadvantages of disinfection with sunlight, depending on reactor type and manner of operation of solar light, responsive Cesar Pulgarin, an expert in the field of biological decontamination process at the Swiss Federal Institute of Technology in Lausanne, Switzerland. This is also the first attempt to assess the minimum UV dose required for inactivation of bacteria completely by solar disinfection.

WHO estimates that more than one billion people lack access to safe drinking water, resulting in millions of deaths each year from water related diseases such as diarrhea. McGuigan said he plans to introduce a flow reactor technology in developing countries, where he hopes it can provide emergency assistance for communities affected by famine, floods, and war. That's just my posts about solar power kills bacteria in the water, thank you the readers.


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