絮凝自过滤工艺处理秸秆机械浆废水的研究

Treatment and Recycling of the Waste Water from Straw Mechanical Pulping

中文关键词:  秸秆机械浆废水  封闭循环水  DCS  SS  COD

Key Words:waste water of straw mechanical pulping  closed recycling water  DCS  SS  COD

中文摘要:

      采用斜筛过滤＋沉淀＋絮凝自过滤水处理工艺对某厂秸秆机械浆废水进行处理并回用，对回用水中主要污染物（SS、DCS、DS、CS等）含量的变化进行分析。结果表明，在聚合氯化铝（PAC）、聚丙烯酰胺（PAM）及沸石添加量分别为100 mg/L、15~20 mg/L、2 g/L的条件下，SS、COD、DCS、DS、CS去除率分别为88.4%、80.7%、48.5%、51.7%、50.5%，回用水中SS、COD、DCS、DS、CS质量浓度分别为170、600～700、340、140、180 mg/L，符合该厂设定的废水回用质量要求。

Abstract:

      A waste water treatment system based on the flocculation and self-filtration was used to treat the waste water from straw mechanical pulping. The main parameters of dissolved and colloidal substance (DCS), suspended substance (SS), chemical oxygen demand (COD) of the waste water in the recycling process were analyzed. The laboratory results and engineering monitoring data showed that when using PAC 100 mg/L, PAM 15~20 mg/L and zeolite 2 g/L, the SS was 170 mg/L with a removing rate of 88.4%, COD 650 mg/L with a removing rate of 80.7%, DCS 340 mg/L with a removing rate of 48.5% and DS 140 mg/L with a removing rate of 51.7%.