TREATMENT OF WATER

摘要

A method of treating water containing dissolved calcium, sulphate and hydroxide ions includes allowing a reaction medium comprising the water, dissolved barium ions and dissolved carbonate ions, to react with carbon dioxide in a reaction zone, to form, as precipitates, solid calcium carbonate particles and solid barium sulphate particles. The calcium carbonate particles have a higher settling velocity than the barium sulphate particles. There is maintained, in the reaction zone, a fluidized bed of the calcium carbonate particles. The barium sulphate particles pass upwardly from the reaction zone. Calcium carbonate particles are allowed to pass downwardly from the reaction zone.