Interesting! Beat the problems of impure water and fight water-borne diseases...
What Causes Water-borne diseases?
You can usually drink rain straight from the sky, but if you're collecting and storing it, you'll want to disinfect rainwater for drinking and cleaning.
The point of disinfection is to remove disease-causing microbes, which include bacteria, algae, and fungi. Rain generally doesn't contain any more microbes than any other drinking water (it's often cleaner than groundwater or surface water). Fortunately, there are simple disinfection methods to use, whether you have power or not.
Traditional methods of disinfection were boiling, bleaching, ozonation, using UV light
Newer Technologies Which Prevent Such Diseases:
One of the newer technologies coming onto the market uses nano alumina. It is usually bonded to micro-glass fibers and features 2- to 3-?m pores, which allow greater flow rates and less pressure drop because the microbes are attracted to the charged microfibers and held tightly. Backflushing is not necessary. This technique promises to be a good alternative that will not require energy input or increased pressure to work and will not depend on clarity, pH or temperature.
Another promising method is photo disinfection with high-intensity LED light.
A similar technique is a capacitive deionization, which charged plates collections from a moving stream of water. The charges on the plates are then reversed and the collected ions are momentarily backflushed out of the system to produce deionized water. Minerals would have to be added to the resulting purified water before drinking, but the energy used is minimal compared to other methods.
The most innovative method of purifying water may be solar electrolysis. Highly contaminated water is mechanically prefiltered and then electrolyzed by solar power into hydrogen and oxygen, leaving everything else behind in a concentrated sludge. The hydrogen is then burned, producing pure water and heat, which is recovered to run a steam generator to charge batteries at night. The system uses untreated water and sunlight to produce hydrogen, oxygen, heat, electricity and clean water.
No matter how you go about getting it, drinking water is one of the world?s most valuable assets. The quality of the water you drink is ultimately your own responsibility and should not be taken lightly. State legislatures across the country are recognizing that rainwater harvesting as a big part of the answer to the water crisis the world faces
Researchers For Promoting Rain Water Purification:
Rainwater Harvesting System at Central Arid Zone Research Institute (CAZRI) campus (Low rainfall area) Location: Jodhpur, Rajasthan
Thinkphi: Start-up based company