Treatment of aluminum hot-rolled waste emulsion by coagulation–flocculation

作者：Qing Zhong, Yingyue Zhu, Zhanqiang Wang, Бо Лю, Xizhi Zouhu, Yuqin Tian, Rongjiao Zhu · 发表于：Desalination and Water Treatment · 年份：2019 · DOI：10.5004/dwt.2019.23860 · 研究领域：Bauxite Residue and Utilization

ABSTRACT Aluminum hot-rolled waste emulsion (AWE) which possessed the properties of high oil content, chemical oxygen demand (COD) and organic pollutants became difficult to treat and demulsify in a traditional way. In the light of the common inorganic demulsifier poly aluminum silicate chloride (PASC), a novel demulsifier epichlorohydrin amine cationic polymer (FP-1) made by our laboratory was added to achieve the effect of complete demulsification. The treatment of AWE was optimized by dint of employing the response surface method and Box–Behnken design to determine the optimal conditions of PASC dose, FP-1 dose and pH. The experimental results which were consistent with the polynomial model predictions demonstrated that oil and COD removal efficiencies of 97.1% and 91.5%, could be achieved by dint of utilizing 1.45 g L –1 PASC, 2.22 g L –1 FP-1 and pH 5.14 at 328 K for 50 min. The demulsification process was studied by morphology analysis, infrared spectrum analysis and zeta potential analysis.