混合化工废水处理工艺设计-毕业（设计）论文.doc

毕业设计 混合化工废水处理工艺设计 学 院 资源与材料学院 专业 工程 班级学号 学生姓名 指导教师 2014年6月日 摘要 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47000m3/d，最高日进水量为61080m3/d。污水进水水质为：CODCr=448mg/L；BOD5=216mg/L；SS=214mg/L；NH3-N=39mg/L；TN=66mg/L；TP=6mg/L。污水处理主路线为：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Ⅲ类水CODcr≥87.7%；BOD5≥90.7%；SS≥89.8%；NH3-N≥79.5%；TN≥63.6%；TP≥80.0%。 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，本污水处理设计满足相关要求。 关键词： 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 influent 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 66mg/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, secondary sedimentation tank, disinfecting tank, finally it flows through PAP metering tank pour into Ⅲclass 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 CODcr≥87.72%; BOD5≥3.06%; SS≥90.65%; NH3-N≥82.05%; TN≥87.88%; TP≥80.00%. 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 yuan every year, and the costs is 0.29 yuan every ton. After calculation, the sewage treatment design meet the relevant requirements. Key Words: Sewage Treatment, A/A/O, Nitrogen and Phosphoru