| 摘要 |
<p>The process for the purification of waste water consists in injecting a coagulating agent composition based on iron salts and/or aluminium salts in association with active silica and a cationic polyelectrolyte, at a dosage ranging between 10 and 850 mg/l, while stirring, at a minimum rate of 1450 rot/min and a Me3+/P molar ratio ranging between 0.15 and 2.0 and a Me3+/S molar ratio ranging between 0.1 nad 0.85, the liquid medium having a pH=4...11, after the separation stage there being obtained an effluent with a phosphorus content of 0.05...0.2 mg/l, a sulphide content of 0.05...0.35 mg/l, the dephosphorization efficiency being of 96...99%, the desulphuration efficiency of 96...99.8%, and the efficiency of reduction of other main pollutants being of at least 90%.</p> |
