混合化工废水处理工艺设计毕业设计论文

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1、 毕业设计（论文） 混合化工废水处理工艺设计 学 院 资源与材料学院 专 业 环境工程 班级学号 xxxxx 学生姓名 xxx 指导教师 Xxx 2014 年 6 月 17 日 混合化工废水处理工艺设计 摘 要 本设计针对南方某小城镇混合化工废水，采用以 A/A/O 工艺为主体工艺的设计方 案。 进水由 20 万人口生活污水与 1.5 万吨工业废水混合而成，平均日进水量为 47000m 3/d，最高日进水量为 61080m3/d。污水进水水质为：COD Cr=448mg/L； BOD5=216mg/L；SS=214mg/L；NH3-N=39mg/L；TN=66mg/L；TP=6mg/L。污水处

2、理主 路线为：污水通过中格栅后进入提升泵房，然后通过细格栅、旋流沉砂池、电磁流量计、 辐流式初沉池等一级处理构筑物，进入二级处理构筑物 A/A/O 生物反应池、然后经过辐 流式二沉池、接触消毒池、巴氏计量槽后，排入类水体，实行城镇污水处理厂污染 物排放标准一级 B 标准，初沉污泥和剩余污泥经过污泥浓缩和脱水后进入污泥最终处 置系统。各类污染物的去除率为：CODcr87.7%；BOD590.7%；SS89.8%；NH3-N 79.5%；TN63.6%；TP80.0%。 污水处理厂总投资费用为 4493.06 万元， 运营费为 728.79 万元/年， 处理成本为 0.29 元/吨。经计算，本污水

3、处理设计满足相关要求。 关键词：污水处理，A/A/O，脱氮除磷，工艺设计 Design Of Sewage Treatment Plant Of Mixed Chemical Wastewater Author: xxx Tutor: xxx Abstract This design is used for the treatment of the urban sewage which contains chemical sewage in the south of China，and the A2O process is used as the main process. The influ

4、ent sewage is consist of the urban sewage discharged by 200,000 people and 15,000 tons industrial sewage. The average of daily water flow is 47000m3/ d, and the highest daily flow is 61080m3/d. The quality of influent water of CODCr is 448mg/L,BOD5 is 216mg/L; SS is 214mg/L; NH3-N is 39mg/L; TN is 6

5、6mg/L; TP is 6mg/L. The main route for the treatment is sewage flow through the medium grill, then flow into pumping station, and then flows through a fine grid, rotational flow grit chamber, electromagnetic flow meter, then it flows through the primary settling tank, A/A/O biological reaction tank,

6、 secondary sedimentation tank, disinfecting tank, finally it flows through PAP metering tank pour into class water. All of this process carries out the B standard of the standard of pollutants for municipal sewage treatment plant. The various pollutants removal is CODcr87.72%; BOD5 3.06%; SS90.65%; NH3-N82.05%; TN87.88%; TP80.00%. The total investment cost of the wastewater treatment plant is 44.9306 million yuan, and the operating costs the treatment costs is 7.2879 million