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F&J Glass Fiber Filter Paper
Particle Retention _____________________________________________________________________________ For air or gas filtration FPXM has a DOP efficiency of 98% when measured at a flow velocity of 32 liters per minute, through a 100 square centimeter area, with a particle concentration of 100 micrograms per liter of air. DOP (dioctyl phthalate) particles used in such determinations have an average size of 0.3 microns. Liquid filtration particle retention values are highly dependent of numerous factors which affect a depth filter's ability to capture and hold particulates. These factors include the physical shape of the particles, viscosity of the solution, flow velocity and others.
Water filtration systems can be bulky and heavy. Depending on the type that you choose they can also be expensive . Pumps and mechanical devices are prone to blockages or failures and chemicals alone result in a less than desirable end product.
Ultralight (17g) 1-Micron Water Filter | Brian's Backpacking Blog
Solar Still Basics
Introduction Solar Still Background | Still Operation Still Water Production | Distillation Purification Capabilities The basic principles of solar water distillation are simple yet effective, as distillation replicates the way nature makes rain. The sun's energy heats water to the point of evaporation. As the water evaporates, water vapor rises, condensing on the glass surface for collection. This process removes impurities such as salts and heavy metals as well as eliminates microbiological organisms.Some redwood boards, a large black towel, copper pipe, a glass pane, screws, and these plans are all you need to make a solar still that will purify more than a gallon a day of salt water. By D.S. Halacy September/October 1974 Ninety years ago, mine owners in the high country of Chile were faced with the problem of providing drinking water for their workers. The only available supply was unfit to drink, and so a means of purifying the liquid had to be found.
HOW TO BUILD - AND USE! - A SOLAR STILL