| 摘要 |
<p>Dephosphorisation of waste water comprises: (i) successive stages of (1) mechanical pretreatment; (ii) biological oxidn. in aerobic medium with simultaneous injection of at least one coagulating agent upstream and downstream of this stage; and (iii) clarification. The coagulating agent is pref. in the form of an aq. soln. of e.g. FeCl3, Fe2(SO4)3, AlCl3, Al2(SO4)3, aluminium polychlorides, mixed aluminium and iron polychlorides, iron polychlorides and CaCl2.</p> |
