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Low power consumption of semiconductors introduce UV disinfection systems that utilized small solar cells in remote or Third World applications. [114] UV-C LEDs don't necessarily last longer than traditional germicidal lamps in terms of hours used, instead having more-variable engineering characteristics and better tolerance for short-term ...
[29] [30] Studies have shown that UV doses at the levels provided by common portable UV units are effective at killing Giardia [31] and that there was no evidence of repair and reactivation of the cysts. [32] Water treated with UV still has the microbes present in the water, only with their means for reproduction turned "off".
Since the effluent from an ATS is often discharged onto the surface of the leach field, the quality is very important. A typical ATS will, when operating correctly, produce an effluent with less than 30 mg/liter BOD5, 25 mg/L TSS, and 10,000 cfu/mL fecal coliform bacteria. This is clean enough that it cannot support a biomat or "slime" layer ...
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$15 $70 Save $55 Your new winter wardrobe staple with its oversized fit and classic button-down style. Soft, cozy, and effortlessly cool, it pairs perfectly with jeans or leggings for that laid ...
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