【作者】 王紫薇；

【导师】 孙世群；

【作者基本信息】 合肥工业大学 ， 环境工程， 2009， 硕士

【摘要】 农药废水是我国工业污水的排放大户,废水具有排放量大、有机物浓度高、成份复杂和难生化降解等特点。在处理技术上,由于农药废水中以有机污染物为主要污染物,所以以生化法为主。绝大部分农药厂采用了物化加生化的组合处理工艺,通过物理化学的方法如格栅拦截、电解气浮等工艺去除部分色度和有机污染物,然后通过生物处理单元进一步处理,使出水达到排放标准。整个处理工艺流程长、费用高,处理效果不理想,达标排放困难。因此,对农药废水的治理技术进行研究具有重要意义。本文首先综述了农药废水常用的处理方法,并着重介绍了采用微电解和厌氧工艺联合处理这种农药废水的目的和意义。针对本研究中某农药厂农药废水,通过对微电解处理效果影响因素的探讨,确定了本次微电解实验的4个影响因子:铁炭填料的比例、进水pH值、Fe粉投加量、微电解反应时间。利用正交实验和单因素实验确定了这几个因素的最佳反应条件之后,再将此微电解最佳反应条件应用到微电解—厌氧生化串联实验中,进而研究该串联设置对此种农药废水的总处理效率。得出的主要研究内容和结论如下:（1）采用正交试验和单因素分析试验的方法分析得出微电解处理农药废水的最佳处理工艺条件为:Fe:C=1:1,pH=3,反应时间60min,CODCr去除率最高可以达到49.19%。废水的可生化性指标B:C也达到了0.26,较之处理前的均值0.15已经有了显著提高,为后续的生化处理减轻了负担;（2）研究微电解一些附加条件如铁屑类型和搅拌速率对微电解处理效率的影响,实验证明,对于本实验中的农药废水来说,最佳的铁形态是铸铁屑,最佳搅拌速率为290r/min;（3）利用微电解最佳条件来安装动态微电解装置,并结合厌氧生化法对农药废水进行串联处理。实验证明,该组合大大提高了废水的可生化性,且处理效果比较稳定,使得整个微电解—厌氧生化反应器系统对COD_Cr去除率也达到了92%。更多还原

【Abstract】 Pesticide wastewater is a big one in our country industrial wastewater. It is characteristics include high organic concentration, complex constituent and hard to treat with bio-treatment. Because the wastewater is mainly polluted by the organic matter, the most popular treatment way is bio-treatment. The pesticide wastewater treatment process is physical chemistry-biologic chemistry. The process removes some organic contamination by physical chemistry way（heading off by using flocculants and electrolysis air flotation）, then treats by biology to make the effluent meets the release standard. The process isn’t a ideal one because of its high cost and long process, so it’t important to research a new way to treat the wastewater.The paper carried out a combined process of“Micro-electrolysis—Anaerobic process”to treat the pesticide wastewater, concernd some factors that influence the treatment of wastewater, including pH, time, Fe:C etc. The main clusions are as below:（1）Research on the most influence factors shows the optimum conditions are: pH value was 3, Fe:C was 1:1, and reaction time was 60 min. The CODCr removal rate was 44.19% by the micro-electrolysis process under the optimum conditions. The best B:C can be 0.26, better than 0.15 that before reaction;（2）Researching on the principle of micro-electrolysis degraded the wastewater. From the research we know the best Fe is cast iron ingot, the best mix speed is 290r/min;（3）Adopted the best condition earned from static state micro-electrolysis method processing pesticide wastewater, started the experiment of laboratory dynamic micro-electrolysis method solution. Then anaerobic process was used to treat the wastewater that from last station. It was proved that the bio-chemical trait of wastewater was remarkably, and the effect was very stable. The total COD_Cr removal rates up to about 92%.更多还原