摘要 |
PURPOSE:To adsorb and deposit efficiently a surfactant in waste water by successively adding an inorg. flocculant, a colloid adsorbent, a neutralizer and a high molecular flocculant to waste water contg. a surfactant and removing the flocculated sludge. CONSTITUTION:An inorg. flocculant is charged into waste water contg. a flocculant in a mixing tank 4 and mixed and then a collid adsorbent is added and agitated in an addition tank 5. Then a neutralizer is added in an addition tank 7 and a high molecular flocculant is added in an addition tank 9. Namely, while the waste water is successively passed through the tanks, the contained surfactant is adsorbed on colloid which is deposited and removed in a precipitator 11. Consequently, the surfactant in waste water can be adsorbed and deposited under optimum conditions and waste water can be most efficiently purified.
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