According to the determined process, this design through to structures (including the grille,water-collecting well, distribution well, the rotational flow grit chamber, triple type oxidation ditch, ultraviolet disinfection and sludge thickening pool) of the main dimensions of the design calculation, hydraulic loss and calculation of pipeline, completed the design process description, process flow diagram (including the deployment of high-rise), plant layout and the main structures monomer chart.

The project is technically feasible, economically reasonable, the project investment and processing costs are low.The cost of investment is 49.81 million yuan, the operating cost is 0.36 yuan /m3.

Wastewater treated to meet The Sewage Treatment Plant Pollutant Discharge Standard (GB18918-2002),the B standard of first level,BOD5≦20mg/ L,CODcr≦60mg/ L,SS≦20mg/ L,NH3-N≦8mg/ L,pH=6~9. After treatment with oxidation ditch process is expected to emission CODcr 3942 tons per year, so that pollution of the water quality can be greatly improved by the recipient, eliminate pollution, protect the environment.

KeyWords:sewage treatment; triple oxidation ditch; CODcr; nitrogen removal

目录

1 绪论 1

1.1 设计背景 1

1.2 环境概况 1

1.3 设计规模和目的 2

1.4 设计依据与原则 2

1.4.1 设计依据 2

1.4.2 设计原则 3

2 污水处理工艺的选择 4

2.1 生活污水处理方法的分类 4

2.1.1 按污染物的性质分类 4

2.1.2 按废水处理程度分类 4

2.2废水水质特点分析 4

2.3废水处理工艺分析 5

2.3.1预处理工艺分析 5

2.3.2主体工艺分析 6

2.3.3消毒工艺分析 11

2.3.4污泥处理工艺分析 11

2.4设计方案确定 12

2.5预计处理效果 13

3 主要工艺说明 14

3.1 粗格栅及进水泵房 14

3.2 配水井 14

3.3 细格栅及旋流沉砂池 14

3.4 T型氧化沟 15

3.5紫外线消毒 16

3.6污泥处理部分 16

3.6.1污泥浓缩池 16

3.6.2污泥脱水机房 16

3.7管路计算与选型 16

4 总体布置 18

4.1平面布置 18

4.2高程布置 18

5 运行管理、劳动定员及工程经济核算 21

5.1运行管理 21

5.2劳动定员 21

5.3直接费用 22

5.4间接费用 24

5.5 成本分析 24

5.5.1 动力费用