Backcountry Water Treatment, Part 3: Microfiltration скачать в хорошем качестве

Backcountry Water Treatment, Part 3: Microfiltration

Does it really matter whether your filter removes 99.9% versus 99.999%? This video is as much about concepts in filtration as it is about the filters themselves. It uses published, scientific studies on real-world concentrations of pathogens found in wilderness waters and lab-tested levels of available filtration rates to examine the question: How much Safety is “enough”? Analyzes risk assessment of the threats from bacteria and protozoa: giardia, cryptosporidium, E. coli. Also includes discussion of service life (gallons filtered), flow rate, backflushing, and combination treatment methods. Part 3 in a continuing series on Backcountry Water Treatment methods. See the whole series here:    • Backcountry Water Treatment   Index 00:35 Core Function 01:38 Risk Tolerance (How much safety is enough?) 03:46 Giardia 05:23 Minimum Effective Dose 06:18 Concentration vs. Dose 07:16 Cyst Acquisition Rates 10:14 Odds of Getting Sick 11:58 The Stakes 15:10 Microfilters 25:47 Cryptosporidium parvum 27:06 Bacteria / Total Coliforms 28:50 Colony-Forming Units 29:48 E. coli 38:13 The Filters 39:05 Service Life 42:55 Flow Rate 46:31 Backflushing 47:45 Summary 51:49 Combining Methods For more on Hydration Strategies and Electrolyte Balance, check out the series on Performance Nutrition for Backpackers:    • Hiker Food