篇一：氧化沟工艺城市污水处理厂设计
武汉科技学院
2004届毕业设计（论文）
题目：氧化沟工艺城市污水处理厂设计
院 系：环境与化学工程系
专 业：环境工程
学 生：
学 号：0051190
指导老师：
摘 要
本论文主要设计氧化沟工艺处理城市污水。城市是人类社会经济发展的一个极其重要的组成部分，在城市的社会经济活动中，每天都要消耗大量的水，用于工业、农业、商业活动以及市民的日常生活。城市污水处理厂是城市发展的重点基础设施，是城市水污染控制、水环境保护工作中的关键工程，它对社会经济的高速、稳定、可持续发展起着保障和促进的作用。
本设计是东北地区的一个城市污水处理厂，其污水流量为6万m3/d，经处理后应达到SS去除率85％，BOD去除率90％。本设计采用奥巴尔（ORBAL）型氧化沟工艺，氧化沟工艺是一种改良的活性污泥法，是以活性污泥为主体的污水生物处理技术。奥巴尔（ORBAL）型氧化沟是氧化沟工艺的一种，具有优于传统氧化沟工艺的特殊优点：工艺流程简单，占地面积小；工艺运行具有灵活性；基建费用和运行费用低，运行管理简单；出水水质好并且有一定的承受水质水量冲击负荷的能力，出水可以达到国家排放标准。处理工艺流程主要由格栅、沉砂池、氧化沟、二沉池、污泥浓缩池、污泥脱水间等组成。本设计的平面布置和高程布置合理，各构筑物集中紧凑、节约用地、便于管理，并且基建费用和运行费用低，运行管理简单。
本论文包括城市污水概况，城市污水处理技术及其新发展，工艺方案的比较及选择，构筑物尺寸的计算，设备的选型，平面布置与高程布置，运行成本的核算等。
关键词：城市污水；设计；ORBAL氧化沟工艺；工艺流程。
ABSTRACT
The paper mainly designs Oxidation Ditch process for the treatment of municipal wastewater. The city is a important part of the development of social economy .It is a great deal of water used for industry, agriculture, business activity and civic daily life in the transaction of city. The factory of the treatment of municipal wastewater is not only the important basic facilities of the city development, but also the main project of the control of municipal wastewater and water resource environment protection as well .It also plays a role in the social economic development.
This design is a factory of the treatment of municipal wastewater in the northeast，the flow of which is 6×104 m3 /d ，the removal rate of SS is 85% and the removal rate of BOD is 90%。The method of this design is ORBAL Oxidation Ditch , the Oxidation Ditch process which is a improved activated sludge process is a biochemical treatment technology for wastewater which mainly based on the activated sludge. the ORBAL Oxidation Ditch that we choose is one of Oxidation Ditch , It has been characterized as simple process and small dimension ; smooth operation; economical and convenient for regulation ; It has favorable ability of bearing the impingement loading the wastewater treated by the processing; it can reach the sewage discharge standard . The process is consisted of screen bar 、sink sand pond 、 Oxidation Ditch 、secondary clarifier 、 sludge concentrated pond 、sludg(本文来自：wwW.xIAocAofaNwEn.com 小 草范 文 网:de氧化沟城市污水处理厂毕业设计)e dehydrated room and so on .And the plane distribution and elevation distribution are rational，the constructions follow the principle of compact，small dimension and fully-used in soil， convenient for regulation，and the cost of building and running are low，simple for operation .
This paper is consisted of the summary of municipal wastewater, the technical and breakthrough of treatment of municipal wastewater, comparison the processes and choose of method, compute of gauge of constructions, the choose of equipment ,the plane distribution and elevation distribution , the check of running cost and so on.
Key Words : municipal wastewater; design ; ORBAL Oxidation Ditch technology;
technology process.
目 录
1 绪论?????????????????????????????? 1
1.1 城市污水概况???????????????????????? 1
1.2 城市污水处理技术及其新发展???????????????? 1 2 城市污水处理工艺选择???????????????????? 6
2.1 工艺方案分析比较?????????????????????? 6
2.2 工艺方案选择确定?????????????????????? 9
2.3 工艺方案阐述????????????????????????9 3 处理构筑物设计??????????????????????? 10
3.1 污水流量的计算?????????????????????? 10
3.2 集水井??????????????????????????? 11
3.3 污水提升泵房???????????????????????? 11
3.4 格栅???????????????????????????? 12
3.5 曝气沉砂池????????????????????????? 14
3.6 砂水分离间????????????????????????? 16
3.7 鼓风机房?????????????????????????? 16
3.8 ORBAL型氧化沟??????????????????????? 17
3.9 辐流式二沉池???????????????????????? 19
3.10 回流污泥泵房??????????????????????? 23
3.11 接触消毒池???????????????????? 24
3.12 剩余污泥泵房??????????????????????? 25
3.13 污泥浓缩池???????????????????????? 25
3.14 浓缩污泥贮池??????????????????????? 28
3.15 浓缩污泥提升泵房????????????????????? 28
3.16 污泥脱水间???????????????????????? 28 4 污水处理厂总体布置??????????????????? 28
4.1 总平面布置????????????????????????? 28
4.2 高程布置?????????????????????????? 29 5 污水处理厂运行成本核算?????????????????? 30
5.1 劳动定员?????????????????????????? 30
5.2 运行费用?????????????????????????? 30 6 工程效益??????????????????????????? 32 7 全文总结??????????????????????????? 32 参考文献???????????????????????????? 34
篇二：氧化沟工艺污水处理工艺毕业设计
摘 要
西安市西南郊地区的工业生产废水和居民生活污水其混合比例为7:3，其废水水质的主要特点是含有大量的有机物，属高浓度有机废水，故其生化需氧量也较大。该混合废水的处理厂的处理水量为15万m3/d，原混合废水中各项指标为：BOD浓度为180mg/L,COD浓度为400mg/L，SS浓度为255mg/L，氨氮浓度为32mg/L。
经分析知该处理水质属易生物降解，且需要二级出水经深度处理，可采用生物处理使水达到工业回用水标准，以缓解城市供水矛盾。故本设计工艺流程为：污水 → 粗格栅 → 集水井及提升泵房 → 细格栅 → 曝气沉砂池 →选择池 → 氧化沟 → 二沉池 → 接触消毒池 → 出水
整个工艺具有总投资小、处理效果好、工艺简单、易于管理、运行稳定、能耗小等优点。处理后的回用水可达到国家二级排放标准经深度处理后的水质如下，即：BOD5浓度≤20mg/L,COD浓度≤100mg/L，SS浓度≤20mg/L，氨氮浓度≤15
mg/L。
关键字：工业废水，污水处理厂，氧化沟，生活污水
ABSTRACT
Xi'an city southwest suburbs area of the industrial wastewater and urban sewage and its mixing ratio of 7:3, the wastewater is characterized by containing large amounts of organic matter, high concentration organic wastewater, therefore its biochemical oxygen demand is large. The mixed wastewater treatment plant processing quantity is 150000 m3/d，, the original mixing wastewater indicators: the concentration of BOD is 180mg/L, the concentration of COD is 400mgL,the concentration of SS is 255mg/L, the concentration of ammonia nitrogen is 32mg/L.
Through the analysis of the processing quality is easily biodegradable, and requires two stage effluent treatment using biological treatment, the water to reach the industrial reuse standard, to alleviate the contradiction of city water supply. The technological process of this design is:
Sewage→Thick grille →Set well and lift pump house→Fine grille →Aeration sink sand pool →Anaerobic pond→Oxidation ditch→Two sink the pond→Contact oxidation pond→Effluent water
The whole process has small total investment, good treatment effect, simple process, easy control, stable operation, low energy consumption. Treated wastewater can be reused to two national emission standards after advanced treatment can reach the standard, That is the concentration of BOD is less than 20, the concentration of COD less than 100, the concentration of SS is less than 20, ammonia concentration is less than 15.
KEY WORDS : organic wastewater, sewage treatment plant, oxidation ditch, process design
目 录
前 言...................................................................................................................... 5
第1章 设计说明书.............................................................................................. 7
1.1设计题目.................................................................................................. 7
1.2设计任务.................................................................................................. 7
1.3设计原始资料及内容.............................................................................. 7
1.4设计要求.................................................................................................. 7
1.4.1进出水水质要求........................................................................... 7
1.4.2处理程度要求............................................................................... 8
1.5工艺选择.................................................................................................. 9
1.6工艺流程................................................................................................ 12
1.7主要构筑物设计说明............................................................................ 12
1.7.1粗格栅......................................................................................... 12
1.7.2集水井及提升泵房..................................................................... 13
1.7.3细格栅......................................................................................... 14
1.7.4曝气沉砂池................................................................................. 15
1.7.5 DE型氧化沟 .............................................................................. 15
1.7.6二沉池......................................................................................... 17
1.7.8污泥泵房..................................................................................... 19
1.7.9污泥浓缩池................................................................................. 19
1.7.10污泥脱水机房........................................................................... 20
第2章 计算说明书............................................................................................ 22
2.1基础计算................................................................................................ 22
2.2粗格栅.................................................................................................... 22
2.3集水井和提升泵房................................................................................ 25
2.3.1集水井设计计算......................................................................... 25
2.3.2水泵设计计算............................................................................. 26
2.4细格栅.................................................................................................... 27
2.5曝气沉砂池............................................................................................ 30
2.5.1设计参数：................................................................................. 30
2.5.2设计计算..................................................................................... 30
2.6 DE型氧化沟 ......................................................................................... 32
2.6.1设计参数..................................................................................... 32
2.6.2 设计计算.................................................................................... 33
2.7二沉池（辐流式沉淀池）.................................................................... 40
2.7.1设计参数..................................................................................... 40
2.7.2设计计算：................................................................................. 40
2.8接触消毒池............................................................................................ 43
2.8.1消毒剂的投加............................................................................. 43
2.8.2平流式接触消毒池..................................................................... 44
2.9污泥泵房................................................................................................ 46
2.9.1集泥池的设计计算..................................................................... 46
2.9.2回流污泥泵的选型..................................................................... 47
2.9.3剩余污泥泵的选型..................................................................... 47
2.10污泥浓缩池.......................................................................................... 47
2.11污泥脱水机房 ...................................................................................... 51
2.11.1污泥脱水 ................................................................................... 51
2.11.2污泥脱水机房设计计算........................................................... 52
2.12处理构筑物高程设计计算.................................................................. 53
结论...................................................................................................................... 56
参考文献.............................................................................................................. 57
致谢...................................................................................................................... 59
附录...................................................................................................................... 60
诚信声明.............................................................................................................. 62
前 言
水是一种宝贵的自然资源，是自然界的基本要素，也是人类和一切生物赖以生存的物质基础。没有水就没有生命。水还是人类环境的重要组成部分。虽然地球上水的储量很大，但是，人类能直接取用的河、湖淡水资源却十分有限。长期以来，世界资源短缺一直困扰着人们，尤其是水资源，因此水处理一直是人们关注的重点。
随着工业生产、农业生产的发展和人口的增加，城市规模的扩大，污水的排放量迅速增加。其中包括生产废水和生活污水，大量未经处理的污水直接排入周围的天然水体，造成了严重的水体污染,致使人类和生物赖以生存的生态环境受到了日益严重的威胁。因此，加快污水处理工程的建设，提高污水处理率，保护有限的水资源，已经成为我国环境保护工作的紧迫任务。
随着大量的化肥、农药、洗涤剂等高浓度N、P工业废水的排出，导致城市污水中N、P浓度急剧增加，从而引起水体中溶解氧降低及水体富营养化，同时影响了处理后污水的复用。所以，要求在城市污水处理过程中不仅要有效地去除BOD5和SS，而且要有效地脱氮除磷。城市污水的处理工艺有物理法、化学法、
生物法，其中生物法日益受到人们的关注。
我国城市污水处理相对于国外发达国家、起步较晚。近200年来，城市污水处理已从原始的自然处理、简单的一级处理发展到利用各种先进技术、深度处理污水，并回用。处理工艺也从传统活性污泥法、氧化沟工艺发展到A/O、A2/O、
AB、SBR（包括CCAS工艺）等多种工艺，以达到不同的出水要求。虽然如此，我国的污水处理还是落后于许多国家。在我们大力引进国外先进技术、设备和经验的同时，必须结合我国发展，尤其是当地实际情况，探索适合我国实际的城市污水处理系统。
目前，国内外城市污水处理厂常采用的二级处理工艺有普通活性污泥法、A1/O生物脱氮活性污泥法、A2/O活性污泥法除磷工艺、A2/O生物脱氮除磷工
艺、AB工艺、氧化沟法（循环混合式活性污泥法）、SBR间歇式活性污泥法七
篇三：日处理水量15万吨城市污水处理厂工艺设计(氧化沟)毕业设计说明书
题 目：院（系）：专 业：学生姓名：学 号：指导教师（签名）：主管院长（主任）
（签名）：时 间：
日处理水量15万吨城市污水
处理厂工艺设计（氧化沟）