500m3 d农药废水处理工程设计.docVIP

PAGE PAGE 56 500m3 d农药废水处理工程设计 摘要 农药废水具有污染物浓度高、毒性大、成分复杂、分水困难、水量水质变化大、易造成二次污染的特点，对环境和人类的危害引起越来越多的关注。本课题的主要任务是根据江苏恒心乔瑞生物科技股份有限公司废水水质，结合国内外对农药废水处理的研究结果，设计了一套经济合理、技术可行的处理方案。 通过对该企业农药原药生产中各环节产生废水水量水质的分析，根据废水处理水质的要求，对现阶段国内外农药废水处理的常用工艺进行了比选，最终确定“微电解—Fenton催化氧化—A2/O生化”联合处理工艺。其中微电解工艺主要破坏有机物质的分子结构，降解废水中有机物；催化氧化工艺主要消除芳香族化合物的生物毒性，改善生物降解性能，去除废水中的悬浮物质和胶体；A2/O工艺可提高有机物降解速率，提高废水的可生化性，以保证出水水质。 废水经设计工艺处理后，COD、NH3-N、TN和TP的去除率可分别达到出水排放标准。经分析得出，此工艺在实际技术应用及经济上是可行的。 关键词：农药废水；处理方法；工艺设计 ABSTRACT Pesticide wastewater with high concentration of pollutants, high toxicity, the composition is complicated, hard to biodegradable characteristics, the attention of more and more harm to environment and human. The main task of this subject was to design a set of economic and technical feasible water-recovery scheme based on wastewater quality at home and abroad,pesticide wastewater pretreatment technology research according to a case study of the bio Polytron Technologies Inc in Jiangsu. Through the analysis of the causes of the enterprise pesticide production each link in the quantity and quality of wastewater, according to the requirement of water quality of the wastewater treatment, the commonly used in the present stage domestic and foreign pesticide wastewater treatment process were compared, and ultimately determine the micro electrolysis -catalytic oxidation-A2/O biological combined treatment process. The micro electrolysis process main failure of molecular structure of organic matter, organic matter degradation in wastewater; catalytic oxidation process mainly to eliminate the biological toxicity of aromatic compounds, improved biodegradation, remove the suspended substance and colloid in the wastewater; A2/O process can be provided with high organic matter degradation rate and improve the wastewater biodegradability. In order to ensure the quality of effluent water. The process on the wastewater COD, NH3-N, TN and TP removal rates fully reach the effluent discharge standards. The analysis