Copperas (Fe2SO4.7H2O) will be added to the liquid waste at a dose rate of 40 kg...

Copperas (Fe2SO4.7H2O) will be added to the liquid waste at a dose rate of 40 kg / 1000 m3 to increase the efficiency of the sedimentation tank. If it is assumed that wastewater contains enough alkalinity in the form of Ca (HCO3) 2, calculate:
a. How many kg of limestone in the form of CaO must be added to complete the reaction! b. The concentration of oxygen needed to oxidize the formed iron hydroxide! c. Mass of sludge produced per 1000 m3 of wastewater! d. The amount of alum needed to produce sludge is equal to (c) if it is assumed that the formed precipitate is Al (OH) 3!

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Ally Wells answered 5 months ago

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