海水洗浴废水的混凝特性及其作用效果研究

摘要

The coagulation properties of bathing seawater were investigated by using iPDA (intelligent Particle Dispersion Analyzers) and Turbiscan Stability Analyzers.The orthogonal test was designed to optimize the coagulation conditions,and removal efficiencies of the main pollutants in bathing seawater were also discussed.By comparison,the coagulation effect of aluminum sulfate (AS) was better than other inorganic flocculants.The size and the setting property of the formed flocs were affected by flocculant dosage.The removal rates for pollutants of bathing seawater increased by combining aluminum sulfate and cationic polyacrylamide.The optimum coagulation conditions were obtained:the dosages of 50 mg/L and 0.5 mg/L for AS and PAM,250 r/min for 2.5 min,60 r/min for 20 min and setting time for 25 min.The removal rates of turbidity,LAS and CODCr were 93.13％,74.64％ and 42.92％ respectively.%采用iPDA在线检测技术和Turbiscan稳定性分析仪对海水洗浴废水的混凝特性进行了研究,通过设计正交试验确定了最适宜的混凝反应条件,并考察了混凝对海水洗浴废水中主要污染物的处理效果.研究结果表明,硫酸铝对海水洗浴废水的混凝效果较好,絮凝剂投加量影响絮体形成尺寸及其沉降性能.硫酸铝和阳离子聚丙烯酰胺联合使用可以提高海水洗浴废水中污染物的去除率,较适宜的混凝条件为:AS和PAM投加量分别为50.0和0.5 mg/L,250 r/min快速搅拌2.5 min,60 r/min慢速搅拌20 min,静沉25 min.在较适宜的混凝反应条件下,其对浊度、LAS和CODCr的去除率分别为93.13％、74.64％和42.92％.