设计总说明：纺织工业在我国具有悠久的历史，具有重要的产业地位，其中印染业又占了较大的部分。据统计，印染废水约占工业废水总排放量的10%。据不完全统计，我国每年约有7. 2 × 108m3印染废水排入水环境，是当前最主要的水体污染源之一。随着化学工业和染整技术的飞速发展和突飞猛进，大量的新的染料及化学用品被使用，其包含的有毒物质越来越多，在环境中也很难降解，有些甚至是高危害的有机物，具有致癌作用，对环境以及人类造成了极大的威胁。因此印染废水的综合治理成为当今社会发展不可忽视的一个关键问题。33630
     针对印染废水的水质特点，对某印染企业排放的废水设计一个合理的废水处理工艺流程。设计水量为5000t/d，进水水质为COD浓度为800mg/L，BOD5为200mg/L，SS为200mg/L，色度为1000， pH为 9.5—10.5。要求处理出水达到《纺织工业污染物排放标准》（GB4287--1992）中Ⅰ级标准以上，其出水水质为COD≤100mg/L，BOD5≤30 mg /L，SS≤70mg/L，色度≤80倍，pH值=6—9。
     由于印染废水的浓度高，色度大，采用单独的物化，生化手段很难达到出水水质要求，需采用物化-生化结合的方法。本设计采用主体为生物接触氧化法的废水处理工艺流程。
工艺流程为：格栅-调节池-水解酸化池-生物接触氧化池-二沉池（竖流式沉淀池）-污泥浓缩池-消毒池-清水池
印染废水先经过格栅，去除一些可能堵塞水泵机组及管路阀门的较粗大的悬浮物。随及进入调节池，用以暂时储存污水，并设曝气设备，使废水水质均匀。随后经过提升泵是废水进入水解酸化池，该池用以降解高分子有机物，提高废水的后续的可生化性。生物接触氧化池是整个工艺流程的主体部分，生物接触氧化法是介于活性污泥法和生物滤池二者之间的污水生物处理技术，兼有活性污泥法和生物膜法的特点。最后污泥浓缩外运，处理后的水经消毒排放或进一步处理。
该处理工艺结构紧凑，运行管理方便，抗冲击负荷，污泥量小，自动化程度高，工人劳动强度低。
污水厂布局合理，重点突出，占地小，环境优美，紧紧围绕环保理念。
毕业论文关键词： 印染废水；水解酸化；生物接触氧化法；工艺流程
Dyeing and finishing wastewater treatment process       
General description of design  ：Textile industry is one of the traditional pillar industries in China, and the printing and dyeing industry takes a large proportion in the textile industry.The printing and dyeing wastewater produced by the printing and dyeing industry accounts for about 1/l0 of total industrial wastewater.According to incomplete statistics, China's annual about 7.2 x 108m3 printing and dyeing waste water discharged into the water environment, is the main water pollution source of water. With the rapid development of industrial dye and finishing technology progress, new additives, dyes and finishing agent has been widely used in printing and dyeing industry, difficult degradation of toxic organic compounds content are more and more, and some are even carcinogenic, mutagenic, resulting in distortion of the organic matter, on the environment especially the water environment of threats and hazards is growing. So the comprehensive treatment of printing and dyeing wastewater has become an urgent problem to be solved.

According to the water quality characteristics of the printing and dyeing wastewater, a reasonable wastewater treatment process is designed for the wastewater treatment of a printing and dyeing enterprise.. The designed water content is 5000t/d, the influent water quality is 800mg/L, BOD5 is 200mg/L, SS is 200mg/L, the chroma is 1000, pH is 9.5 - 10.5. Requirements of effluent reaches more than the textile industrial pollutants emission standards "(GB4287--1992) (I), grade, and the effluent water COD is less than or equal to 100 mg / L, BOD5 is less than or equal to 30 mg / L, SS is equal to or less than 70mg / L, chroma is less than or equal to 80 times, pH = 6 - 9. 每天5000吨染整废水的处理工艺设计+CAD图纸:http://www.youerw.com/huaxue/lunwen_30816.html