摘要：

DSD酸是一种重要的染料中间体,还原段DSD酸生产废水属于难治理的工业废水。选用硫酸铝和聚丙烯酰胺的混凝剂组合对该废水进行预处理。研究表明,在混凝剂硫酸铝投加量100mg/L,助凝剂聚丙烯酰胺投加量10mg/L,快速搅拌1min,慢速搅拌15min,pH为6.5～7.5,温度为50℃的工况条件下,COD_Cr、色度去除率分别达36%和34%,有效地降低了后续生化工艺的处理难度。

关键词: 混凝, 4,4’-二氨基二苯乙烯-2,2’-二磺酸, 硫酸铝, 聚丙烯酰胺

Abstract:

Wastewater from deoxidation section of DSD acid production is a kind of dyeing intermediate and belongs to refractory industrial wastewter. Aluminum sulfate and polyacrylamide are used as coagulants and aid coagulants to pretreatment this wastewater. The study shows that , under conditions of AS dosage of 100 mg/L, PAM dosage of 10 mg/L, quickly stirring time 1 min, slowly stirring time 15 min, pH 6.5 - 7.5, 50 ℃, the COD_Cr removal rate and decoloration rate are up to 36% and 34% respectively. As a result, the treatment difficulties in following processes are reduced effectively.

Key words: coagulation, 4, 4’- diaminostilbene- 2, 2’- disulphonic acid, aluminum sulfate, polyacrylamide

中图分类号: 

• X703.1