混凝-反渗透组合工艺处理丙烯酸酯胶粘剂工业废水

Acrylate adhesive industrial wastewater treated by coagulation-reverse osmosis combination process

以硫酸铝为破乳剂、阳离子型PAM(聚丙烯酰胺)为絮凝剂,采用混凝法对强碱性水性丙烯酸酯胶粘剂工业废水[COD(化学需氧量)为37.90 g/L,pH值为13.1]进行预处理,然后运用反渗透技术对预处理后的废水进行深度处理。考察了破乳剂、絮凝剂以及搅拌时间等对废水预处理效果的影响,同时确定了混凝-反渗透组合工艺的最佳工艺参数。结果表明:常温破乳剂的最佳投料量为28.2 mg/L,絮凝剂最佳投料量为0.24 g/mL,最佳搅拌时间为10 min,反渗透操作温度为30℃、操作压力为0.4 MPa;该工业废水经混凝-反渗透组合工艺处理后,其COD值降至0.069 g/L、COD去除率达99.8%。

With aluminum sulfate as deemulsifier,cationic PAM（polyacrylamide） as flocculating agent,the industrial wastewater from alkali waterborne acrylate adhesive,which COD（chemical oxygen demand） and pH value were 37.90 g/L and 13.1 respectively,was pretreated by coagulation method,then the pretreated wastewater was further treated by reverse osmosis technology. The influences of some factors such as deemulsifier,flocculating agent and mix round time were investigated on pretreated wastewater efficiency,and the optimal technical parameters of coagulation-reverse osmosis combination process were ascertained. The results showed that the optimal contents of deemulsifier at room temperature and flocculating agent were 28.2 mg/L and 0.24 g/mL respectively,optimal mix round time was 10 min,operating temperature and press of reverse osmosis were 30 ℃ and 0.4 MPa respectively. The COD value was decreased to 0.069 g/L and COD removal rate was 99.8% after the industrial wastewater was treated by coagulation-reverse osmosis combination process.