Water Treatment and Purification |
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acid aeration alkalinity alum American Water amount backwash bicarbonate blowdown blowoff boiler water brine CaCO3 calcium and magnesium calcium carbonate calcium sulphate carbon dioxide carbonate hardness CaSO4 chemical solution chlorine coagulation combination concentration condenser corrosion deaerating dissolved solids effect embrittlement Engineering Chemistry evaporator excess filtration grains per gallon gravel gravity hard water heat exchanger hydroxide impurities Industrial and Engineering ions Journal lime and soda-ash magnesium bicarbonates make-up water mixing chamber noncarbonate hardness operation organic matter oxygen phosphate pipe precipitate pressure prevent pump rapid sand filter rate of flow raw water react remove residual salts sand bed sedimentation settling basin settling tank silicate sludge soda ash sodium alkalinity sodium carbonate sodium phosphates sodium sulphate soft water soluble steam suspended matter tion total hardness treated water turbidity valve wash water Water Softening water supply Water Treatment Water Works Association zeolite bed zeolite softener