多步絮凝吸附法处理高浓度有机废水

Treatment of High Concentration Organic Wastewater by Multi-step Flocculation and Adsorption

以抚顺市腈纶厂的腈纶废水为原料,采用单因素试验和正交试验探讨絮凝和吸附相结合的方法处理高浓度有机废水的可行性。实验表明,采用单一絮凝剂处理腈纶工艺废水,阳离子聚丙烯酰胺的絮凝效果最好;采用多步絮凝吸附后絮凝效果明显改善,并且提高了浊度和COD的去除效果,其中最佳组合顺序为阳离子聚丙烯酰胺、聚合氯化铝、壳聚糖,这种组合絮凝吸附能使腈纶废水浊度的去除率达到90%以上,COD的去除效率达到70.5%。

Acrylic fiber wastewater from Fushun city acrylic plant was used as feedstock,the feasibility of treatment high concentration organic wastewater by combination method of flocculation and adsorption was investigated through single factor experiment and orthogonal experiment. Experiment results showed that positive ion polyacrylamide presented the best flocculation effect in the experiment of treatment acrylic fiber wastewater by single flocculant. The flocculating effect was improved remarkably by multi-step flocculation and adsorption,and the removal effect of turbidity and COD was increased.The optimum combination order was positive ion polyacrylamide,the polymerization aluminum chloride and the shell polyose,and the removal efficiency of turbidity and COD can reach above 90% and 70. 5% after treatment acrylic fiber wastewater by the combination of flocculation and adsorption,respectively.