保险粉废水和农药废水的高效处理技术

发布时间：2018-04-29 02:15

  本文选题：保险粉废水 + 农药废水　； 参考：《安徽工业大学》2015年硕士论文

【摘要】：如何实现化工类高浓度废水的有效治理,关系到我国国民经济的健康发展。文中分别针对保险粉和杀虫双两种废水的污染现状、危害以及常见的处理方法进行了简要的介绍,对保险粉和农药废水的新型处理方法进行重点阐述,进而开展了相关类型废水的处理工作。研究内容主要包括:保险粉废水的絮凝、Fenton氧化、电-Fenton氧化等处理工艺参数的优化以及杀虫双废水的Fenton氧化-离子交换联合处理技术的研究。具体工作如下:首先利用混凝沉降技术对保险粉废水进行处理,对比了两种常见絮凝剂的处理效果差异。结果显示当混凝pH为9,搅拌速度为100 rpm,聚合氯化铝和聚丙烯酰胺用量均为0.1%时,COD去除率可达48.9%。在此基础上考查了Fe-H2O2Fenton体系对混凝后的废水处理效果。结果表明,最佳Fenton条件为废水pH~3,Fe2+投加量为500 mg/L,H2O2投加量为10 g/L,反应时间3 h,COD去除率可达62.6%。实验还研究了电-Fenton氧化法对Fenton后废水的处理情况。结果表明,当电流密度0.3 A/cm2、混合添加剂浓度5 g/L、反应时间6 h时,COD去除率可达92.5%。随后研究了杀虫双农药废水的Fenton氧化处理工艺,利用正交实验法初步确定了联合工艺的处理条件,并对主要影响因素进行了单因素优化。结果表明,废水经硫酸调节pH值至3左右,Fe2+投加量为600 mg/L,H2O2投加量为12 g/L,反应3 h,COD去除率达到52.3%。实验同时对Cl-的树脂吸附去除进行了考查。结果表明,当废水pH值~6,流速7 mL/min、4个吸附柱串联、树脂总用量为5 g时,Cl-动态吸附率可达43%;而当pH值~4、树脂用量为10 g、吸附时间为90 min时,其静态吸附率可达40%。最后对蒽醌类染料生产过程中所产生的固体废弃物处理进行了初步尝试。结果表明,染料生产固废先用丙酮溶解,然后用5%的碳酸钠溶液进行萃取,在温度为50℃、萃取次数为3次、萃取时间为10 min、搅拌速度为300 r/min的情况下,萃取率可达56.7%。
[Abstract]:How to realize the effective treatment of high concentration wastewater of chemical industry is related to the healthy development of our national economy. In this paper, the pollution status, harm and common treatment methods of two kinds of wastewater, insurance powder and insecticidal wastewater, are introduced briefly, and the new treatment methods of insurance powder and pesticide wastewater are described emphatically. Furthermore, the treatment of wastewater was carried out. The main contents of the research include: flocculation Fenton oxidation, electro-Fenton oxidation and Fenton oxidation-ion exchange combined treatment of insecticidal wastewater. The main works are as follows: firstly, the coagulation and settling technology was used to treat the wastewater from the insurance powder, and the treatment effects of the two common flocculants were compared. The results show that the removal rate of COD can reach 48.9 when the coagulation pH is 9, the stirring rate is 100rpm, the dosage of polyaluminium chloride and polyacrylamide is 0.1. On this basis, the effect of Fe-H2O2Fenton system on wastewater treatment after coagulation was investigated. The results showed that the optimal Fenton conditions were as follows: the dosage of pH ~ (3) Fe _ (2) was 500 mg / L ~ (-1) H _ 2O _ 2 was 10 g / L, the reaction time was 3 h, the removal rate of COD could reach 62.6%. The treatment of wastewater after Fenton by electric-Fenton oxidation was also studied. The results show that when the current density is 0.3 A / cm ~ 2, the concentration of additive is 5 g / L, and the reaction time is 6 h, the removal rate of COD can reach 92.5%. Then the Fenton oxidation treatment process of the pesticide wastewater was studied. The treatment conditions of the combined process were preliminarily determined by orthogonal experiment, and the main influencing factors were optimized by single factor. The results showed that the amount of Fe _ 2 was 600 mg / L ~ (-1) H _ 2O _ 2 was 12 g / L, and the COD removal rate was 52.3%. At the same time, the resin adsorption removal of Cl- was investigated. The results show that when pH value is 6, flow rate is 7 mL / min, 4 adsorption columns are in series, and the total amount of resin is 5 g, the dynamic adsorption rate can reach 43, while when pH value is 4, resin dosage is 10 g, adsorption time is 90 min, the static adsorption rate can reach 40%. Finally, the treatment of solid waste produced in anthraquinone dyes production was preliminarily attempted. The results showed that the solid waste of dye production was dissolved in acetone and then extracted with 5% sodium carbonate solution. Under the conditions of temperature 50 鈩，

本文编号：1817932