余家湖五万吨污水处理厂设计.doc

余家湖五万吨污水处理厂设计

独创性声明 5
摘  要 6
ABSTRACT 7
1. 概述 8
1.1 项目概况 8
1.1.1 城镇概况 8
（一）、地形地貌 8
（二）、地质构造 9
（三）、水文与气象资料 9
2. 设计规模及进出水指标 11
2.1 污水量预测 11
3 污水及污泥处理工艺方案选择 13
3.1 污水处理工艺原则 13
3.3.1 原污水的生化处理可行性 14
3.3.2 污染物去除及处理工艺要求 16
3.5 污泥处理工艺 26
3.5.1 污泥浓缩脱水工艺 26
4 污水处理生产构（建）筑物工艺设计 29
4.1 粗格栅及进水泵房 29
4.1.1 粗格栅 29
4.5 二沉池 43
4.5.1 配水井与污泥泵房 43
4.5.2 二沉池 43
4.6 加药间 45
4.7 接触消毒池 46
4.8 贮泥池及污泥浓缩脱水车间 46
4.8.1 贮泥池 46
5. 总图设计 48
5.1 厂区平面设计 48
6. 环境保护 51
7. 组织机构、劳动定员 54
7.1 组织机构 54
8. 投资概算 55
9. 成本及效益分析 56
9.1 费用效果分析 56
9.3.1 社会效益分析 57
参考文献 58
 
摘  要

当今，随着经济的快速发展，人民生活水平的不断提高，环境污染日趋严重，加大城市污水治理力度势在必行。本设计的主要任务是城镇污水处理厂的设计，该污水处理厂工程的总规模达到50000㎥/d。
采用改良型A2/O氧化沟工艺，该工艺将A2/O与氧化沟的特性相结合，改良型A2/O氧化沟的主要优点在于脱氮除磷效果明显，BOD负荷高，能有效防止污水处理厂经常出现的污泥膨胀。
   污水处理流程为：进水从泵房到细格栅，进入曝气沉砂池，再进入改良A2/O氧化沟，最后进入二沉池，经消毒后尾水外排。
本设计包含污水处理工艺流程的确定，主要构筑物尺寸设计与计算，施工图纸的绘制等。
设计出水水质执行《城镇污水处理厂污染物排放标准》GB18918-2002一级B标准。本工程的实施将显著改善受纳水体水质，同时间接产生经济效益，促进经济可持续发展。

关键词：污水处理； 改良型A2/O氧化沟； 脱氮除磷；工艺设计

 
ABSTRACT

Nowadays, with the rapid economic development and the people's living standard improved, environmental pollution is more serious. So it is both inevitable and necessary to develop the urban sewage treatment. The main task of this design is the sewage treatment plant in town, the total of the sewage treatment plant project amount to 50000 tons / day.
This design uses improved A2/O oxidation ditch process. This process combined A2/O with the characteristic of oxidation ditch, the main advantage of the improved A2/O oxidation ditch is the good effect of nitrogen and phosphorus removal, high load of BOD, can effectively prevent the sludge expansion of the sewage treatment plant that quite often happens.
The wastewater treatment plant for the sewage treatment process: Sewage from the pumping station to the grid, then entering the improved A2/O oxidation ditch. Convergent flow into the secondary sedimentation tank, Into contact with pool, finally the water emissions.
This design contains the identification, the size design and calculation of the mainly constructs, construction drawings drawing etc.
The effluent quality carries out B-level standards from pollutant emission standards of urban sewage treatment plant—GB18918-2002. The implementation of this project will significantly improve the water quality of receiving water, and indirect economic benefits and promote sustainable economic development.

Keywords: sewage treatment; improved A2/O oxidation ditch; removal the nitrogen and phosphorus; process design