A2O工艺污水处理厂课程设计

目 录

引言 ..................................................................................................................................... 5 1设计任务及设计资料 ...................................................................................................... 6 1.1设计任务与内容 ................................................................................................................. 6 1.2设计原始资料 ..................................................................................................................... 6 1.2.1城市气象资料 ............................................................................................................. 6 1.2.2地质资料 ..................................................................................................................... 7 1.2.3设计规模 ..................................................................................................................... 7 1.2.4进出水水质 ................................................................................................................. 7 2、设计说明书 ................................................................................................................... 8 2.1去除率的计算 ..................................................................................................................... 8 2.1.1溶解性BOD5的去除率 ................................................................................................ 8 2.1.2 CODr的去除率： ........................................................................................................ 8 2.1.3.SS的去除率： ........................................................................................................... 9 2.1.4.总氮的去除率： ........................................................................................................ 9 2.1.5.磷酸盐的去除率 ........................................................................................................ 9 2.2城市污水处理工艺选择 ..................................................................................................... 9 2.3、污水厂总平面图的布置 ................................................................................................ 10 2.4、处理构筑物设计流量(二级) ........................................................................................ 11 2.5、污水处理构筑物设计 .................................................................................................... 11 2.5.1.中格栅和提升泵房（两者合建在一起） .............................................................. 11 2.5.2、沉沙池 .................................................................................................................... 12 2.5.3、初沉池 .................................................................................................................... 13 2.5.4、厌氧池 .................................................................................................................... 13 2.5.5、缺氧池 .................................................................................................................... 14 2.5.6、曝气池 .................................................................................................................... 14 2.5.7、二沉池 .................................................................................................................... 14 2.6、污泥处理构筑物的设计计算 ........................................................................................ 15 2.6.1污泥泵房 ................................................................................................................... 15 2.6.2污泥浓缩池 ............................................................................................................... 15 2.7、污水厂平面，高程布置 ................................................................................................ 16 2.7.1平面布置 ................................................................................................................... 16 2.7.2管线布置 ................................................................................................................... 16

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2.7.3 高程布置 .................................................................................................................. 16 3 污水厂设计计算书 ....................................................................................................... 17 3.1污水处理构筑物设计计算 ............................................................................................... 17 3.1.1中格栅 ....................................................................................................................... 17 3.1.2污水提升泵房 ........................................................................................................... 18 3.1.3、沉砂池 .................................................................................................................... 22 3.1.4、初沉池 .................................................................................................................... 24 3.1.5、厌氧池 .................................................................................................................... 26 3.1.6、缺氧池计算 ............................................................................................................ 27 3.1.7、曝气池设计计算 .................................................................................................... 27 3.1.8、二沉池 .................................................................................................................... 35 3.1.9计量堰设计计算 ....................................................................................................... 37 3.2 污泥处理部分构筑物计算 .............................................................................................. 38 3.2.1污泥浓缩池设计计算： ........................................................................................... 38 3.2.2 储泥灌与污泥脱水机房设计计算 .......................................................................... 41 3.3、高程计算 ........................................................................................................................ 41 3.3.1污水处理部分高程计算: ......................................................................................... 42 3.3.2污泥处理部分高程计算: ......................................................................................... 42 参考文献 ........................................................................................................................... 43 致 谢 ........................................................................................... 错误！未定义书签。

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Contents

Introduction ………………………………………………………………………………5

1 the task and the materials of design………………………………………………………6 1.1 the task and content of design…………………………………………………………6 1.2 the firsthand information of design…………………………………………………6 1.2.1 Meteorological materials of the city………………………………………………6 1.2.2 Geological materials………………………………………………………………6 1.2.3 the scale of Design………………………………………………………………7 1.2.4 quality of Pass in and out water……………………………………………………7 2 design instruction …………………………………………………………………………7 2.1 Calculation of the getting rid of rate……………………………………………………7 2.1.1 Getting rid of rate of dissolving BOD5…………………………………………………7 2.1.2 Getting rid of rate of CODcr …………………………………………………………7 2.1.3 Getting rid of rate of SS …………………………………………………………………8 2.1.4 Getting rid of rate of Total nitroge ………………………………………………………8

2.1.5 Getting rid of rate of Phosphate……………………………………………………8 2.2 Sewage disposal craft choice in the city…………………………………………………9 2.3 Arrangement of water works' general layout……………………………………………10 2.4 the flow of structures (Second ) ……………………………………………………10 2.5 design of disposal structures …………………………………………………………11 2.5.1 Grid and pump house ……………………………………………………………11 2.5.2 sand Sink pool……………………………………………………………………12 2.5.3 Sink the pool for the first time………………………………………………………13 2.5.4 Detest oxygen pool ………………………………………………………………13 2.5.5 Pool with meagre oxygen…………………………………………………………13 2.5.6 aerobic pond ………………………………………………………………………14 2.5.7 Second sedimentation pond………………………………………………………14 2.6 The designs of the structures …………………………………………………………14 2.6.1 Mud pump house…………………………………………………………………14 2.6.2 The mud concentrates the pool……………………………………………………15 2.7 The level of sewage factory, high Cheng assigns………………………………………15

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2.7.1 The collocation of the plan………………………………………………………………15 2.7.2 The collocation of the pipelines……………………………………………………16 2.7.3 The collocation of the altitude ………………………………………………………16 3 the book of Design and calculate ……………………………………………………………17 3.1the calculation of the build…………………………………………………………………17 3.1.1 Mid-Grid……………………………………………………………………………17 3.1.3 sand sedimentation pondv……………………………………………………………18 3.1.4 the first clarfying pond………………………………………………………………21 3.1.5 anaerobic pond………………………………………………………………………22 3.1.6 anoxic pond…………………………………………………………………………24 3.1.7 the design and calculation of the oxygenate pond …………………………………25 3.1.8 the design of clarifying pond…………………………………………………………25 3.1.9designing the measuring weir…………………………………………………………33 3.2 the design of the sludge treatment building………………………………………………35 3.2.1the design of the sludge concentrated building………………………………………36 3.2.2 the design of the sludge saving tank and the dehydration……………………………39 3.3 altitude collocation………………………………………………………………………40 List of references ……………………………………………………………………………41 Thanks…………………………………………………………………………………………42 Appendix………………………………………………………………………………………43

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某市污水处理厂A/A/O工艺设计

作者：蒋丽丽，指导教师：孙丰霞 （山东农业大学资源与环境学院）

【摘要】随着社会进步，人们对于城市污水的处理的要求愈加严格。除了基本的去除污水中BOD和SS的要求外，通常还要求脱氮除磷，以保护水体环境。本设计即采用了众多脱氮除磷工艺中较为经济合理的AAO工艺对进入污水厂的污水进行处理。设计污水处理厂处理所在城市生活污水，日处理能力10万方，有效去除水中BOD、SS以及氮、磷元素，出水质量将达到国家污水综合排放标准二级标准。本设计对污水处理厂处理流程、处理构筑物、以及高程进行了初步设计。 【关键词】：A/O ，生物脱氮除磷 ，水污染治理，城市污水

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The design of biologicalphosphorus and nitrogen removal with the A2/O process．

Author：JiangLili Supervisor：SunFengxia

(ShanDong Agriculture University)1

Abstract: With social progress, the demand for people's treatment of the municipal sewage is stricter..Except the demands of BOD and SS in the sewage, demand denitrification get rid of the phosphorus yet usually to go besides a basic one, in order to protect the water body environment .W have adopted A2／O craft to deal with the sewage which enters the sewage factory in this design. This paper Introduces the principles of biological phosphorus and nitrogen removal with the A2／O process and describes the flow chart of this process which Is then analyzed In detail．

Keyword A2/O ，biological phosphorus and nitrogen removal，wastewater treatment municipal wastewater

引言

长期以来，城市污水处理均以去除有机物和悬浮物为目的，其工艺为普通活性污泥法．该法对氮、磷等无机营养物去除效果很差．一般来说，氮的去除率只有20％～30％，磷的去除率只有10％～20％．随着大量的化肥、农药、洗涤剂等高浓度氮、磷工业废水的排出，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BOD

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