| 摘要 |
<p>The invention relates to a process for purifying used sewage and industrial waters, with a soluble chemical inorganic charge (transitional metal cations, ammonium, nitrate anions, nitrite, phosphate, sulphate etc.) and organic charge (carbamide, phenol, detergents, dyes etc.) and with non-soluble or physical charge (mineral and organic suspensions). The process consists in using two aqueous systems, one for deflocculation, based on cationic polyelectrolyte, N-cetylpirydine chloride and domestic soap, and the other one, for coagulation, as an aqueous suspension of a mineral coagulant, namely aluminium sulphate, and then, dispersing two pulverous materials, namely fresh ash resulting from burning sunflower husks, and calcium oxide, with role of alkaline pH corrector, adsorbant and flocculation germ.</p> |
