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1、青岛理工大学毕业设计(论文)用纸I摘 要本次毕业设计的题目为山东省 B 市城市污水处理厂设计,主要任务是对污水处理厂一期工程进行设计,掌握工程设计的基本步骤,掌握城市污水处理工艺设计、厂区平面布置以及各处理单元构筑物设计计算的基本方法。污水处理厂三期的总处理规模为 4.5 万吨/日。进水水质:CODCr:550mg/L,BOD 5:250mg/L,SS:280mg/L,NH 3-N:46mg/L,TN:58mg/L,TP:6.5mg/L。要求处理后水质达到国家城镇污水处理厂污染物排放标准(GB18918-2002)一级 A 标准的要求:CODCr50mg/L,BOD 5 10mg/L,SS10
2、mg/L,NH3-N5mg/L,TP0.5mg/L。 本设计根据其进水水质、水量及出水情况,分析比较了各种污水处理工艺,确定该污水处理厂采用倒置的 A/A/O 工艺,该工艺具有处理效果好,出水水质稳定,运行管理方便,基建与运行费用低等特点。产生的污泥经浓缩、脱水后外运。主要设计内容包括:污水处理工艺选择及各工艺单元的设计(包括工艺流程的确定及各单体构筑物的设计);污泥处理工艺设计(包括工艺流程的确定及各单体构筑物的设计);污水处理厂的平面及高程布置(包括污水处理厂处理构筑物和辅助构筑物的平面图及高程图的绘制)。 关键词:污水处理,倒置 A/A/O 工艺,污泥处理,平面布置,高程布置青岛理工大学
3、毕业设计(论文)用纸IIABSTRACTThe graduation design topic is to design B citys wastewater treatment plant of SHANDONG . The main task is to design the wastewater treatment plants first project,master the basic steps in engineering design and the city wastewater treatment process design, factory layout and eac
4、h processing unit to build a basic method in design and calculation.The total construction scale of the first project is m3/d; The original water: CODCr:550mg/L, BOD5:250mg/L; SS:280mg/L; NH3-N: 46mg/L; TN:58mg/L; TP:6.5mg/L for handling the water quality to achieve the country the urban wastewater
5、treatment plant emissions standards (GB18918-2002) level 1A standard requirements: CODCr less than 50 mg/L, BOD5 less than 10mg/L BOD5, SS less than 10mg/L, NH3-N less than 5mg/L, TP less than 0.5 mg/L.In this paper, according to the feed water quality, water quantity and water situation, analyses a
6、nd compares the all kinds of wastewater treatment process, determine the sewage treatment plant using the separate inflowing reversed A/A/O process, the process has good effect,stable water quality,easy operation and managment,infrastructure and low operation cost.the sludge is transported out of th
7、e plant after concentration and dehydration. The main design content includes: choosing the wastewater treatment process and the process of design unit (including process flow and the determination of the monomer structures design); The sludge treatment process design, (including process flow and th
8、e determination of the monomer structures design); Wastewater treatment plants the plane and elevation layout (including wastewater treatment plant structures and auxiliary structures plan and elevation drawing). 青岛理工大学毕业设计(论文)用纸IIIKEY WORDS:wastewater treatment, reversed A/A/O process, suldge treat
9、ment, the plane and elevation layout青岛理工大学毕业设计(论文)用纸1目录前 言 .4第 1 章 设计任务 .61.1 目的: .61.2 设计要求 .61.3 污水水质以及出水要求 .7第 2 章 污水处理方案论证 .82.1 污水处理等级论证 .82.1.1 污水可生化性分析 .82.1.2 污水可生物处理的衡量指标 .82.1.3 污水处理等级的确定 .92.2 工艺方案选择原则 .102.3 二级处理工艺 .102.3.1 二级处理工艺方案简述 .102.3.2 二级处理工艺方案选择 .142.4 二级处理工艺方案比较 .152.4.1 方案论述 .
10、152.4.2 比选方案技术比较 .162.5 污水处理方案确定 .162.6 污水消毒工艺方案比较 .172.7 污泥处理构筑物设计说明 .18第 3 章 污水处理系统设计计算 .193.1 进出水情况 .193.1.1 处理负核 .193.2 粗格栅 .203.2.1 设置 .20青岛理工大学毕业设计(论文)用纸23.2.2 粗格栅设计计算 .203.2.3 进水泵房 .233.3 细格栅 .233.3.1 设计流量 .233.3.2 设计参数选择及计算 .243.4 沉砂池 .273.4.1 沉砂池的作用 .273.4.2 几种常用沉砂池的比较 .273.4.3 沉砂池的选用 .283.4.4 设计计算 .283.5 初次沉淀池 .323.5.1 初沉池的选用 .