传统活性污泥法处理日处理3万吨城市生活污水处理厂的设计

目录

摘要 ................................................................................................................................................... I Abstract ............................................................................................................................................. II 1 前 言 ............................................................................................................................................ 3 2 文献综述 ...................................................................................................................................... 4

2.1地区概况 .............................................................. 4

2.1.1气象资料 ................................................................................................................. 4 2.1.2水文情况 ................................................................................................................. 4 2.2相关法规及工程实施准则 ............................................... 5 2.3传统活性污泥法的背景及现状 ........................................... 5 3 工艺说明 ...................................................................................................................................... 7

3.1工艺方法比选 .......................................................... 7

3.1．1 传统活性污泥法 ................................................................................................. 7 3.1.2 A/O工艺 .............................................................................................................. 9 3.1.3 SBR工艺 ........................................................................................................... 10 3.1.4 氧化沟工艺 .......................................................................................................... 11 3.1.5.卡鲁塞尔氧化沟 ................................................................................................... 13 3.2 最佳工艺选择 ........................................................ 14

3.2.1.传统活性污泥法 ................................................................................................... 14 3.2.2 A/O工艺 ............................................................................................................... 14 3.2.3．SBR工艺 ........................................................................................................... 14 3.2.4.卡鲁塞尔氧化沟 ................................................................................................... 14 3.2.5.A2/O工艺 .............................................................................................................. 15 3.3传统活性污泥法的工艺流程简图 ......................................... 15 4 主要构筑物的设计计算 ............................................................................................................ 16

4．1格栅 ............................................................... 16

4.1.1 粗格栅 .................................................................................................................. 17 4.1.2细格栅 ............................................................. 19 4.2 沉砂池选择与设计计算 ................................................ 21

4.2.1沉砂池的选择 ....................................................................................................... 21 3.2.2 曝气沉砂池的设计计算 ............................................... 22 4.3 推流式曝气池的设计计算 .............................................. 26

4.3.1．已知条件 ............................................................................................................ 26 4.3.2．设计计算 ............................................................................................................ 26

4.4二次沉淀池的选择与设计计算 ........................................... 37

4.4.1二次沉淀池的选择 ............................................................................................... 37 3.4.2辐流式沉淀池设计计算 ....................................................................................... 38 4.5紫外线消毒工艺设计计算 ............................................... 40

3.5.1紫外线消毒工艺特征 ........................................................................................... 40 4.5.2紫外线消毒工艺设计计算 ................................................................................... 41 4.6 污泥浓缩池设计计算 .................................................. 42

4.6.1剩余污泥量的计算 ............................................................................................... 42 4.6.2设计计算 ............................................................................................................... 43

5 平面布置和高程设计 ................................................................................................................ 46

5.1污水处理构筑物高程计算 ............................................... 46

5.1.1.构筑物水头损失 ................................................................................................... 46 5.1.2.管渠水头损失 ....................................................................................................... 46 5.2.污水处理高程计算及布置 ............................................... 48 5.3泵型的选择 ........................................................... 49 5.4污水处理厂的平面布置 ................................................. 49 6.经济分析 ..................................................................................................................................... 52 7.参考文献 .................................................................................................................................... 54 8. 致谢 ........................................................................................................................................... 56

景德镇陶瓷学院毕业设计（课题）任务书

材料科学与工程 学院 2013 年 9 月 15 日 专 业 学生姓名 题目 环境工程 程健平 班级 指导老师 2010 梁华银 活性污泥法处理3万吨/日城市生活污水处理厂初步设计 设计技术指标、参数： 进水：3万m3/日，BOD5=170mg/L,CODCr=240 mg/L， NH3-N=20 mg/L（T=10℃），TN=40 mg/L, SS=160mg/L, 碱度（以CaCO3计）=250 mg/L 出水：生活污水国家一级排放标准 基本要求： 1、择合适的处理工艺； 2、构筑物及反应装置选择合理，计算正确； 图纸包括总平面图，高程图，流程图及主要设备图共5张；要求手工和计算机作图各一半左右； 3、设计说明书要求35页以上，要求语句通顺，公式选择合理，排版格式正确，图表规范； 4、参考3－5篇外文，10篇左右中文，并翻译至少3000字符的外文； 5、对照工作进度，按时完成。 工作进度： 第 1-4 周 毕业实习；完成实习日记与实习报告 第5 周 查阅文献，选择工艺； 第6-12周 设备与工艺的设计计算，完成设计说明书 第12-16周 绘制图纸，修改并打印论文 第17周 上交论文，准备答辩。

摘要

本次设计是设计一个日处理量为3万吨的城市生活污水厂的设计，本次设计所实用的工艺为传统的活性污泥法，传统活性污泥的主要流程是污水进入推流式曝气池，在曝气池内的活性污泥利用污水中的有机物进行繁殖，从而达到去除水中有机物的要求，推流式曝气池工艺有其本身的缺点就是前段供养不足，会形成厌氧状态，后期供养过剩。所以在这过程中，池内的微生物会有硝化作用和反硝化，所以能够去除一定量的氨氮，从而达到出水对氨氮的要求。传统活性污泥法相对其他工艺而言更为经济，在不考虑氨氮的出水情况下用传统活性污泥法更为经济。此次设计的进水指标是，BOD5=170mg/L,CODCr=240 mg/L， SS=160mg/L,经过处理后的水质的出水指标BOD5=16mg/L,CODCr=45 mg/L， SS=16mg/L符合国家出水水质一级B标准。由于本设计所用的是传统活性污泥法因而对氨氮的去除率是比较低的因此本次设计对氨氮无要求。

关键词：传统活性污泥法 经济 推流式 设计 城市污水

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Abstract

This design is a daily processing capacity of 30,000 tons municipal sewage plant use the traditional activated sludge process, the main process is conventional activated sludge sewage into the plug-flow exposure gas pools in the aeration tanks of sewage sludge use in organic breeding to achieve the removal of organic compounds in water requirements , plug-flow aeration process has drawbacks of its own front-end support is inadequate , will form an anaerobic state, late dependents surplus. So in this process, the pool of microbial nitrification and denitrification there , so a certain amount of ammonia can be removed , so as to achieve the effluent ammonia nitrogen requirements. Conventional activated sludge process in terms relative to other more economical , without considering the case of ammonia water using conventional activated sludge process more economical. The design is water indicators , BOD5 = 170mg / L, CODCr = 240 mg / L, SS = 160mg / L, after the treated effluent water quality indicators BOD5 = 16mg / L, CODCr = 45 mg / L, SS = 16mg / L a B meet national water quality standards . Because of this design is used in the conventional activated sludge process and thus the ammonia removal is relatively low so this design is no requirement for ammonia .

Keywords: conventional activated sludge process economic Plug-flow

Design Urban sewage

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