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Water purification slow sand filter diagram. Slow sand filtration is an extremely efficient method for removing microbial contamination and will usually have no indicator bacteria present at the outlet. His installation fed a concentrated solution of chloride of lime to the water being treated. 2 3 2 treated water storage 59 1 equalization storage 59 2 total storage 59 chapter 3 design. According to the world health organization under suitable circumstances slow sand filtration may be not only the cheapest and simplest but also the most efficient method of water treatment disadvantages.
Supernatant or raw water 2. These are 5 of the quickest and easiest homemade diy water filter methods. To use the filter users simply pour water into the top and collect finished water out of the outlet pipe into a bucket. Alexander cruickshank houston used chlorination of the water to stem the epidemic.
Berkey state that the filtration on their products is so effective virtually no other system can duplicate this performance. Users can maintain flow rate by cleaning the filter through agitating the top level of sand or by pre treating turbid water before filtration. In recent years biological or slow sand filters are mistakenly considered as old fashioned references. Due to the low filtration rate slow sand filters require extensive land area for a large municipal system.
Over time especially if source water is turbid the flow rate can decrease. Slow sand filter biological filter elements of a slow sand filter 1. Nb this topic is also covered in the fact sheet e21 slow sand filtration for community or family use which includes part of this fact sheet since sand filtration can be used although in a different way either to treat effluents or to purify water at family level. 73 table 6 1 continued effectiveness over factors that affect water quality bacteria guinea odour organic treatment system amoebas worm cercaria fe mn fluoride arsenic salts taste matter turbidity.
However here is why you should ever rely on these methods. Berkey water filters are pretty much the most popular water filters for home family use.
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