制革废水毕业设计--废水处理厂设计

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1、毕业设计（论文）用纸 - I - 摘摘 要要 废水处理厂设计规模 3000m3/d，设计水质水量为：Q=3000m3/d ， CODcr=18003000mg/L， PH=7.510，SS=7001000 /l ，BOD=8001200 /l,色度200400 倍。经处理后，应达到下列出水水质：COD300mg/L，色度 80倍，SS150mg/L, BOD达100 mg/L,即达到污水综合排放标准 （GB8978-1996）中制革行业的二级标准。 本工程方案设计依据有关环境保护在污水中的要求，采用混凝沉淀接触氧 化工艺处理制革废水，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

2、 COD 的去除率为 93.6%, SS 的去除率为 90.4%,色度去除率为 82%。 经技术经济分析，此方案投资总额 457 万元，废水处理成本为1.53元/ m3， 有着良好的经济效益和社会效益。且节约用地、提高绿化、降低能耗的理念在设 计中得到充分的实践，符合新时代环保的要求。 关键词： 制革废水 混凝沉淀 接触氧化 格栅 初沉池 调节池 混凝沉淀池 接触氧化池 二沉池 集泥井 污泥浓缩池 脱水间 泵房 污泥外运 出水 制革废水 - II - Abstract The designing scale of waste water treatment plant is 3000 m3/d

3、, the designing quality and quantity of water are: Q=3000m3/d ，COD=18003000mg/L , BOD=8001200/l ，PH=7.510 ,SS=7001000 /l , Chroma =200400 times. After disposing of it, the quality of water should attain the following standards: COD300mg/L,SS150mg/L，Chroma 80 times，BOD 100 mg/L ,reaching the second s

4、tandard (GB8978-1996）of integrated wastewater discharge standard. The designment of this project is in accordance with requirements of the environmental protection in the wastewater. It uses the contact oxidation process - coagulating sedimentation process to deal with the wastewater in tanning indu

5、stry. Based on comparison of the detailed program, we select the following processes: tannery wastewater Gridsprimary sedimentaion tank balance pondcontact oxidation process coagulating sedimentationsecondary clarifierDrainage sludge treatment process:enrichmentsludge dewateringoutbound logistics Th

6、rough designing, we can know that the result of COD is 90.6%,SS is 90.4%, Chroma is 82%. After technical and economic analyzing, the investment amount of this project is 4.57million Yuan, and the cost of disposal of waste water is 1.53 Yuan/ m3. 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 desi