【作者】 丁禄彬；

【导师】 彭人勇；

【作者基本信息】 青岛科技大学 ， 环境科学， 2009， 硕士

【摘要】 N,N-二甲基甲酰胺简称DMF(英文名称:N,N-dimethylformamide),是一种优良的工业溶剂和有机合成材料,它广泛应用于制革、化工、医药、农药等各个生产行业。含DMF的废水毒性大,稳定性高,随意排放会对环境造成严重的危害。山东淄博某农药厂在生产过程中产生含DMF农药废水,利用传统的生物法污水处理工艺不能实现达标处理。按照企业要求,论文对此种废水进行了回收利用和处置。首先利用自主研制的减压-精馏装置回收废水中的DMF有机物,然后利用高级氧化法将后续农药废水达标处理。这不仅充分体现了清洁生产的理念,同时也为企业创造了可观的经济回报。论文从以下两个方面对该农药废水进行回收利用和处置:第一,针对该农药废水DMF占废水中有机组分的72%,约占废水重量的20%的特点,论文设计了一套减压-精馏装置,利用该装置回收农药废水中的DMF,从而达到回收DMF和减轻后续废水处理压力的双重目的。实验结果表明:利用自主设计的常压和减压-精馏两套实验装置经过连续的实验后,农药废水中的DMF回收率可以达到82.47%,回收后DMF的纯度为98.63%,超出了企业的预期目标。第二,回收DMF后的后续农药废水毒性和有机物含量都有明显降低,论文利用高级氧化法中的臭氧、双氧水、Fenton试剂和活性炭及其它们的组合对后续农药废水进行降解处理。实验结果表明:在臭氧、Fenton试剂和活性炭反应柱的联合作用下,废水中的CODcr降解率达到97.82%,NH3-N(氨氮)降解率达到99.7%,TOC(总有机碳)降解率为94.14%,TN(总有机氮)降解率为98.5%,满足了企业的排放要求。更多还原

【Abstract】 DMF(N,N-dimethylformamide) is a good industrial solvent and organic synthesis material ,and it has been widely used in Tannery, Chemical, Medicine and Agriculture. DMF wastewater can be serious harm to the environment because of its high toxicity and stability.DMF wastewater that come from a pesticide industry in Zi-Bo,Shan-Dong province can not be discharged standard by the treatment of traditional biology process. According to enterprises requirement, resource recovery and treatment on the wastewater has been made on this paper. Firstly, a vacuum distillation device has been designed for the recovery of DMF from the wastewater, and then the emission standard has been achieved by the treatment of advanced oxidation process on the rest wastewater. All the efforts not only reflect the idea of clean production, but also bring economic benefit to the industry. The effort of resource recovery and treatment on the pesticide wastewater is started from two parts on this paper.Firstly, the DMF content in the organic wastewater is up to 72%, then a vacuum distillation device has been designed for the recovery of DMF that contained in the wastewater ,and recovery DMF and relieve the pressure of treatment on the rest wastewater have been expected on this part. The result shows that the recovery rate of DMF in the wastewater is up to 82.47%,and the recovery purity of DMF can be reached to 98.63% by the vacuum distillation experimental device, process route and two continuous process of atmospheric distillation and vacuum distillation that are designed for the experiment, and it exceeds the enterprise prospective goals。Secondly, the toxicity and organic content are lowered in the rest pesticide wastewater, then the advanced oxidation process which included ozone, hydrogen peroxide, Fenton reagent and activated Carbon are used to deal with the rest wastewater. The experiment results show that the pesticide wastewater is greatly degraded with the combination of ozone, hydrogen peroxide, Fenton reagent and activated Carbon, and the degradation rate of CODcr, NH3-N, TOC and TN are respectively up to 91.82%, 99.7%, 94.14% and 98.5%, and finally the pesticide wastewater treated by advanced oxidation process can be met the discharging requirement of the enterprise.更多还原