毕业论文-日处理3000m³印染废水处理厂工程方案设计.docx

摘 要本印染废水处理厂设计规模3000m3/d，设计水质水量为：Q=3000m3/d ，CODcr=700～1000mg/L， PH=7.5~10.0，SS=500～800 ㎎/l，色度400～600倍。经处理后，应达到下列出水水质：COD≤100mg/L，色度≤40倍，SS≤50mg/L,要求处理后水质达到《山东省地方标准纺织染整工业水污染物排放标准》 ( DB37/ 533－2005) 标准中B级标准： COD≤60mg/l，SS≤30mg/l，色度≤30倍。印染废水的特征可概括为：有机物浓度高、成分复杂、可生化性较差、色度深、碱性大、PH高、水质变化大。本工程方案设计依据有关环境保护在污水中的要求，采用混凝沉淀—水解酸化—接触氧化工艺处理纺织印染废水，在详细方案比较的基础上，选择了如下处理工艺流程：经设计可知COD=94.0%, ηSS=96.2%,色度95%。经技术经济分析，此方案投资总额869万元，废水处理成本为2.8元/ m3。关键词：纺织印染废水 混凝 水解酸化接触氧化AbstractThe designing scale of waste water treatment plant is3000 m3/d, the designing quality and quantity of water are: Q=3000m3/d ，COD=700～1000mg/L ,PH=7.5～10 ,SS=500～800 ㎎/l ,Color degree=400～600 times. After disposing of it, the quality of water should attain the following standards: COD≤60mg/L，SS≤30mg/L，Chroma ≤ 30 times，reaching the B standard of (DB37/533-2005）of local standards of Shandong Province Textile industrial water pollutant discharge standards.The design of this project is in accordance with requirements of the environmental protection in the wastewater. It uses the coagulation-sedimentation-hydrolytic acidification–contact oxidation process to deal with the wastewater in textile printing. Based on comparison of the detailed program, we select the following processes:Through designing, we can know that the result of COD is 94%,ηSS is 96.2%,color degree is 95%.After technical and economic analyzing, the investment amount of this project is 8.69million Yuan, and the cost of disposal of waste water is 2.8 Yuan/ t. It not only gains good economic and social benefits, but also fully puts the ideas of saving land economically, improving virescence and reducing energy consuming into the practice while designing, which is in conformity with new era environmental needs.KEY WORDS: Textile printing and dyeing wastewater;Coagulationsedimentation;Hydrolytic acidification ;Contact oxidation目录目录4前言8第一章综述91.1印染废水的产生及特点91.2印染废水的处理111.2.1印染废水处理的通用方法111.2.2针织印染废水的产生与处理121.3设计依据和原则131.3.1设计依据131.3.2设计原则14第二章工艺流程的选择142.1悬浮物的去除142