论文总字数：37753字

摘 要

本文是对苏北D镇总体规划，设计建设一座8万m³/d的城镇生活污水处理厂进行的研究。任务是作出污水污泥处理工艺设计计算，编制计算书，绘制污水厂总平面图、污水处理工艺高程图、污水处理工艺流程图以及重要处理构筑物详图。

由于本设计要求最终水体质量要求达到国家《城镇污水厂污染物排放标准》（GB 18918—2002）的一级B标准^[1]，且对脱磷除氮有一定要求，因此在考虑经济成本和实际操作后确定工艺为倒置A²/O。

该污水厂对于污水部分处理流程为：中格栅-污水提升泵房-细格栅-沉砂池-一级沉淀池-倒置式A²/O生物池-二沉池-接触池，最后通过出水管排入对应水体。残存污泥的处理过程是先浓缩，再硝化，然后脱水，最终做成泥饼外运用于发电。

其中，格栅是采用链式格栅机，分别为中格栅和细格栅，两用一备；污水提升泵房是采用合建式泵房，选用WQ400-1500-10-75提升泵四台，泵房尺寸25m×6m，三用一备；集水池的尺寸18m×4.1m；沉砂池采用平流式沉砂池，共两座，池长9m，有效水深1m；初沉池采用平流式初沉池，共五座，沉淀部分水深4m，池长36m；缺氧池两座，容积3250m³，厌氧池两座，容积3250m³，好氧池两座，容积16249m³，曝气池采用鼓风曝气，设备为RG-400罗茨鼓风机，共7台，两备五用；二沉池采用幅流式二沉池，共两座，直径37m，有效水深4.7m；回流污泥泵采用550Q300-R-160型号两台，一备一用；接触池采用五廊道式平流加氯接触池，共一座，廊道宽9m，有效水深3m；污泥浓缩池直径为7.72m，共两座；污泥脱水采用DYL-1000带式压滤机两座，一备一用。

关键词：倒置A²/O 污水处理 设计计算

Design of sewage treatment process in D Town

Abstract

This paper is a study on the general planning of d town in north Jiangsu province, and the design and construction of an 80, 000 m3 / d urban living sewage treatment plant.The task is to make the design calculation of sewage sludge treatment process, prepare the calculation book, draw the total plan of the sewage plant, the elevation chart of sewage treatment process, the sewage treatment process flow chart and the important details of the structure.

Due to our design requirements for the water quality meet the national "urban sewage plant pollutant discharge standard" (GB 18918-2002), the level of B standard [1], and the dephosphorization has certain requirements, in addition to nitrogen so in considering economic costs and actual operation process for the horse A squared/O.

The wastewater treatment plant sewage treatment process: grille sewage pumping station - fine grid - sand pool - primary clarifier - inverted A2/O process - two tank - contact tank, finally after the measurement process of sludge discharge weir. The first is concentrated in the nitrification, then dehydration, finally made the cake. Sent to the power plant combustion for power generation.

Where is the use of chain grille grille machine, respectively in the grid and the fine grid, dual-use equipment; sewage pumping station is built by the pumping station, using WQ400-1500-10-75 lift pump four, pump size 25m * 6m three with a preparation; sump size 18m * 4.1m; sand mining sand pool with pool the parallel flow type, a total of two seats, the pool is 9m long, the effective depth of 1m; the primary settling tank by horizontal flow type primary settling tank, a total of five seats, precipitation part depth 4m, pool length 36m; anoxic tank two, volume 3250m3, anaerobic pool two, volume 3250m3, anaerobic pool two, Volume 162 49m3, the aeration tank aeration equipment, RG-400 blower, a total of 7 units, two five; the radial flow sedimentation tank two two sedimentation tank, a total of two seats, the diameter of 37m, the effective depth of 4.7m; return sludge pump model using 550Q300-R-160 two, one with a prepared; contact tank with five Gallery channel type advection chlorine contact tank, a seat, corridor width 9m, the effective depth of 3M; sludge thickening tank diameter is 7.72m, a total of two; sludge dewatering by DYL-1000 belt filter press two, with a prepared one.

Key words: inverted A2/O;sewage disposal;design calculation

目 录

摘 要 I

一.处理目的和任务 1

1.1设计规模 1

1.2城市自然状况 1

1.3污水水质 1

1.4水量换算表 2

二.处理方案的比选 3

2.1工艺比选 3

2.2工艺流程 4

三.工艺设计和计算 5

3.1进水闸井 5

3.1.1污水厂进水管设计参数： 5

3.1.2设计计算 5

3.2中格栅 6

3.2.1中格栅的设计计算 6

3.3污水提升泵房 10

3.3.1泵房设计 10

3.3.2水泵总扬程估算和选型 10

3.4细格栅 10

3.4.1细格栅设计计算 10

3.5沉砂池 14

3.5.1沉砂池的选型 14

3.5.2沉砂池设计计算 14

3.6初沉池 18

3.6.1初沉池的选型 18

3.6.2初沉池的设计计算 18

3.7倒置A2/O工艺 21

3.7.1工艺的选择理由 21

3.7.2池体部分设计计算 22

3.7.3反应池进出水设计 25

3.7.4曝气系统设计计算 27

3.7.5空气管系统计算 29

3.7.6鼓风机的选定 31

3.7.7缺氧池及厌氧池设备选择 31

3.8二沉池 32

3.8.1二沉池的选择 32

3.8.2设计计算 32

3.8.4进出水设计 37

3.9接触消毒池 39

3.9.1设置消毒池的目的 39

3.9.2接触池的设计计算 39

四.污泥处理系统 42

4.1污泥处理的目的 42

4.2污泥处理的流程 42

4.3污泥处理的设计计算 42

4.3.1污泥浓缩的设计计算 42

4.3.2污泥脱水 46

五.污水厂的布置 48

5.1污水厂的平面布置 48

5.1.1概述 48

5.1.2污水厂平面布置的具体内容 48

5.2污水厂的高程布置 48

5.2.1污水厂高程布置的主要任务 48

5.3高程计算 48

5.3.1污水处理系统高程计算 48

5.4污水泵房的设计 54

5.4.1泵房的平面布置 54

5.4.2泵房的高程布置 54

5.4.3泵房附属设施 55

5.4.4污水处理厂附属建筑及其尺寸 56

参考文献 57

致 谢 59

第一章 处理目的和任务

1.1设计规模

依据苏北某市D镇整体规划，拟建造一座8万m³/d的城镇生活污水处理厂，要求采用生物处理工艺，处理出水达到《城镇污水厂污染物排放标准》（GB18918-2002）一级B排放标准,并尽量提高出水水质。

1.2城市自然状况

（1）地理位置：位于苏北地区

（2）气温：：15.6℃，：37.9℃，：-9.5℃。

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