for which hindered settling takes place whose settling is unaffected by the neighbouring particles whose settling influences neighbouring particles, i.e., due to mass action which settles as compressed settling

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difference of sp. gr. of particle and medium specific gravity of the particle specific gravity of the medium sum of sp. gr. of particle and medium

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ferrous sulphate and ferrous chloride chlorine and ferrous sulphate ferric sulphate and ferric chloride chlorine and ashes of copper

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complete destruction of life removal of causative organism for disease killing only pathogenic bacteria killing all the bacteria

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be very cheap not alter the quality of water kill all the bacteria act instantaneously

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ozone ultra violet rays heat lime

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highly turbid waters hard waters clear waters waters rich in suspended solids

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it can be used for any type of water no chemical is added to water it is cheap post contamination is impossible

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gravity system for a part and pumping for the remaining combined pumping and gravity system pumping system gravity system

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the city had a gentle slope and source is elevated the city is in plains and source is fairly elevated the city is on steep slopes and source is below any type of topography

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