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Unformatted text preview: 20% of sewage) 90% of cities use o Secondary methods- biological methods (speed up natures normal methods of decomposing sewage)- 2 types (takes 60-70% out of water) Trickling filter Activated sludge method o Tertiary methods- advanced (removes last 10-20%) Charcoal filters Electro dialysis- reverse osmosis o Osmosis- the way our body take things out of blood stream and put them in cells...
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This note was uploaded on 04/30/2008 for the course CHE 1405 taught by Professor Dworkin during the Spring '08 term at Baylor.
- Spring '08