絮凝作用
浊度
聚丙烯酰胺
沉淀
废水
乳状液
色谱法
化学
阳离子聚合
悬浮物
沉降时间
制浆造纸工业
环境工程
环境科学
有机化学
高分子化学
地质学
控制工程
工程类
阶跃响应
海洋学
摘要
In the present study, the performance of compound flocculants composed of different concentrations of polyaluminum chloride (PAC) and cationic polyacrylamide (CPAM), the influencing mechanism of the flocculation process and the effects of temperature, settling time, and speed and time of stirring were investigated. The results show that the poor water quality with high concentrations of oil, suspended solids (SS) and polymer greatly increases the oily wastewater emulsion stability and the difficulty of the flocculation treatment process. The compound flocculant in oily wastewater treatment can achieve best results at optimum conditions of temperature 45 °C, settling time 60 min, and two stirring stages, 250 r·min-1 for 3 min followed by 100 r·min-1 for 7 min. At the PAC dosage of 80 mg·L-1 and the CPAM dosage of 0.8 mg·L-1, the turbidity of oily wastewater is reduced from 153.8 NTU to 11.2 NTU, and the turbidity removal rate reaches 92.69%. Through further measurements, oil content and SS content are less than 10 mg·L-1, which meets the requirement of the Daqing oilfield re-injection standard.
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