20000m3d城市污水处理厂综合设计(含11个CAD作图图纸)--优秀毕业设计

本设计污水处理厂综合设计包括15个图纸，十分全面，具体详见报告后附图。本报告附图全面详细。图纸内容如下：A2O池，初沉池，幅流式二沉池，隔栅，工艺简单图，工艺流程图（高程图），回转耙式格栅除污机图，平面布置图，污泥浓缩池，厌氧消化池，钟式沉砂池等。全为CAD制图。

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题目20000m3/d城市污水处理厂综合设计

专业: 环境工程

年级: 2005级

学号: 3105001286

姓名: 莫笑伟

指导教师:

2008年12 月

摘要

我国水体污染主要来自两方面，一是工业发展超标排放工业废水，二是城市化中由于城市污水排放和集中处理设施严重缺乏，大量生活污水未经处理直接进入水体造成环境污染。工业废水近年来经过治理虽有所减少，但城市生活污水有增无减，占水质污染的51%以上。

我国水体污染主要来自两方面，一是工业发展超标排放工业废水，二是城市化中由于城市污水排放和集中处理设施严重缺乏，大量生活污水未经处理直接进入水体造成环境污染。工业废水近年来经过治理虽有所减少，但城市生活污水有增无减，占水质污染的51%以上。

本设计要求处理水量为20000m3/d的城市生活污水，设计方案针对已运行稳定有效的A2/O活性污泥法工艺处理城市生活污水。A2O工艺由于不同环境条件，不同功能的微

）能生物群落的有机配合，加之厌氧、缺氧条件下，部分不可生物降解的有机物（COD

NB

被开环或断链，使得N、P、有机碳被同时去除，并提高对COD

的去除效果。它可以同

NB

－－时完成有机物的去除，硝化脱氮、磷的过量摄取而被去除等功能，脱氮的前提是NH

3

N应完全硝化，好氧池能完成这一功能，缺氧池则完成脱氮功能。厌氧池和好氧池联合完成除磷功能。

关键词：城市生活污水，活性污泥，A2/O

目录

摘要 ··················································································· III 目录 ······················································································ IV 第一章设计概述 ······································································- 7 -1设计任务 ······································································- 7 - 2设计原则 ······································································- 7 - 3设计依据 ······································································- 8 - 第二章工艺流程及说明 ·····························································- 8 -1工艺方案分析 ································································- 8 - 2工艺流程 ······································································- 9 - 3流程各结构介绍 ·····························································- 9 -

3.1格栅······························································································· - 9 -

3.2沉砂池··························································································- 10 -

3.3初沉池··························································································- 10 -

3.4生物化反应池··············································································- 10 -

3.5二沉池··························································································- 12 -

3.6浓缩池··························································································- 12 - 第三章构筑物设计计算 ··························································· - 12 -1格栅 ·········································································· - 12 -

1.1设计说明······················································································- 12 -

1.2设计计算······················································································- 13 -