The book Water Purification And Sewage Disposal was written by author J Tillmans Here you can read free online of Water Purification And Sewage Disposal book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Water Purification And Sewage Disposal a good or bad book?
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Even up to a few decades ago short work was made of effluents. Generally speaking, the water used in dwelling-houses was conducted in ordinary open sewers to the nearest river. The vast increase of large towns and the unexpected progress of industry led to the most serious nuisances in this disposal of sewage into rivers. The evil, which is every day becoming more apparent, is both hygienic and economic. Many large towns are dependent on river-water for their water supply. As was explained in t...he previous section, the bacteria are generally removed by means of a sand filter. Apart from the consideration that the filter naturally cannot remove dissolved filth, substances which owing to their origin may be harmless seem to leave a water unappetising as a drinking-water. Also a greater pollution of surface-water with sewage produces a larger number of bacteria in the filtered water, since no filters are completely germ-tight. This is all the more serious, as, naturally, in sewage waters which contain all human excreta, disease germs may very easily be present.
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