High Efficiency Phosphorus Flocculants Prepared with Red Mud for Treating Lake Water

Wen Qin Zhang; Bo Lin Li; Ye Li; Ya Nan Liang

doi:10.4028/www.scientific.net/AMM.614.649

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 614High Efficiency Phosphorus Flocculants Prepared...

High Efficiency Phosphorus Flocculants Prepared with Red Mud for Treating Lake Water

Abstract:

In this study, different acid modification methods were used to prepare two types of inorganic flocculation compounds. First, under simulated wastewater conditions, the optimal input quantity for phosphorus elimination of flocculant #1 was 0.5 g/L, and the optimal agitation conditions were rapid agitation at 300 rpm for 60 s followed by slow agitation at 20 rpm for 15 min. The optimal input amount of flocculant #2 was 0.8 g/L, and the optimal agitation conditions were rapid agitation at 300 rpm for 30 s followed by slow agitation at 100 rpm for 10 min. Then they were used to treat water from the East Lake. The removal rates of TP, ammonia nitrogen, COD, and turbidity by flocculant #1 were 91.45%, 60.90%, 80.71%, and 93.05%, respectively; the corresponding removal rates by flocculant #2 were 92.74%, 58.49%, 76.92%, and 84.66%, respectively. The discharged water for both flocculants had TP and COD concentrations that met the type III standards in GB3838-2002.