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In the sewage plant design, should meet the following principles: according to the country about environmental protection policy, as well as meet the local national related laws and regulations, norms and standards; The use of advanced and reliable process to ensure that the processed can reach the discharge standards; Guaranteed, efficient and high quality of advanced equipment, high standards and design of automatic control system, so that the daily operation and management; Comprehensive planning, rational layout, the overall coordination, the sewage treatment engineering do not contradict with the surrounding environment, coordinated; Considering environmental, economic and social benefits, on the premise of ensure that water quality standard, try to reduce unnecessary engineering investment and operation management cost; Proper management during the process of sewage treatment, the solid content of sludge in preventing secondary pollution of the environment. So that every design process of the sewage plant can reasonably and reduce the initial investment and area.
In terms of design and calculation, according to the technical specification for oxidation ditch sewage treatment of activated sludge system, the sewage treatment plant process design manual ", "water supply and drainage design manual", "oxidation ditch sewage treatment technology", "urban sewage treatment plant pollutant discharge standard", "indoor drainage design code for structures, elevation, factory district area, found the correct method to calculate, carries on the reasonable design. Computing, and according to the above method of proofreading, ensure the correctness of the design and calculation, to follow-up factory drawings for plane, elevation, structures, so as to achieve all the requirements for sewage design, reasonable and correct creative design are presented.
Key words: Carrousel oxidation ditch Urban sewage Water pollution control
目 录
1.绪论 1
1.1 我国城镇污水处理现状及发展目标 .1
1.1.1 我国城镇污水处理现状 .1
1.1.2 我国城镇污水处理的发展目标 .1
1.2 课题研究背景及意义 .2
2.设计说明书 .4
2.1 设计任务及依据.4
2.2 设计水量、水质及排放标准 .4
3.城市污水处理工艺选择 . 6
3.1 工艺方案分析比较 .6
3.1.1 A2/O工艺 .6
3.1.2 生物膜法处理工艺 .6
3.1.3 氧化沟工艺 .7
3.2 工艺方案的确定.8
4.工程计算10
4.1 设计水流量的计算 10
4.2 格栅 10
4.2.1 格栅设计说明10
4.2.2 格栅设计计算10
4.3 集水井 12
4.3.1 集水井设计说明 12
4.3.2 集水井设计计算 12
4.4 污水提升泵房 12
4.4.1 污水提升泵房设计说明 12
4.4.2 污水提升泵房设计计算 12
4.5 曝气沉砂池 13
4.5.1 曝气沉砂池设计说明13
4.5.2 曝气沉砂池设计计算13
4.6 鼓风机房15
4.7 配水井 15
4.8 Carrousel氧化沟 .15
4.8.1 氧化沟设计说明 15
4.8.2 氧化沟设计计算 15
4.9 幅流式沉淀池 18
4.9.1 二淀池设计说明 18
4.9.2 二沉池设计计算 18
4.10 污泥回流泵房.19
4.10.1 污泥回流泵房设计说明 .19
4.10.2 污泥回流泵房设计计算 .20
4.11 紫外消毒池 .20
4.11.1 紫外消毒池设计说明 .20
4.11.2 紫外消毒池设计计算 .20
4.12 剩余污泥泵房.21
4.12.1 剩余污泥泵房设计说明 .21
4.12.2 剩余污泥泵房设计计算 .21
4.13 污泥浓缩池 .21
4.13.1 污泥浓缩池设计说明 .21
4.13.2 污泥浓缩池设计计算 .21
4.14 浓缩污泥贮池.23
4.15 浓缩污泥提升泵房 .23
4.16 污泥脱水间 .23