安徽省歙县某污水处理厂(3万吨日)二期扩建及提标改造工程初步设计

 2022-07-06 01:07

论文总字数:30214字

摘 要

工程现状为:已建一期工程规模3万m³/d,以生活污水为主。污水处理工艺采用A/A/O生化一体池工艺,执行一级B排放标准,处理尾水排入练江。

二期扩建及提标改造工程总规模6.0万m³/d,其中一期提标改造工程规模3.0万m³/d,二期扩建工程3.0万m³/d。具体污水主处理工艺为:污水进入粗格栅及提升泵房,经粗格栅去除大的固体漂浮物后经提升进入细格栅及旋流沉砂池,而后自流进入改良A/A/O生化池,厌氧、缺氧和好氧交替进行,可有效脱氮除磷。同时,在好氧的情况下,大量有机污染物也同时得到有效的去除。污水在A/A/O系统中净化后再进入二沉池中进行污泥和处理水的分离。结束这一步再由高效沉淀池和深床滤池进行处理,考虑深度处理段建设用地受限,没有建设接触消毒池所需用地,故一期、二期统一考虑采用紫外消毒系统,经紫外消毒达到一级A排放标准要求,最后排入练江。生物处理及化学除磷产生的剩余污泥,通过剩余污泥泵提升至脱水机房内,经浓缩脱水一体机进行脱水后,含水率lt;80%的泥饼外运至生活垃圾场卫生填埋。

关键词:改良A/A/O生化池,高效沉淀池,深床滤池,紫外消毒系统

Abstract

The current status of the project is that the first-phase project has been built with a scale of 30,000 m3/d, mainly of domestic sewage. The wastewater treatment process adopts the A/A/O biochemical integrated pool technology and implements the first-grade B emission standard, and the treated tailwater is discharged into Lianjiang.

The total scale of the second-phase expansion and bid upgrading project is 60,000 m3/d, of which the first-phase upgrade project has a scale of 30, 000 m3/d, and the second phase expansion project has been 30,000 m3/d. The main sewage treatment process is: the sewage enters the coarse grid and the lifting pump room, after the coarse grid to remove large solid floats, it is lifted into the fine grid and swirling grit chamber, and then flows into the improved A/A/O. Biochemical pools and biochemical pools are equipped with anaerobic zones, anoxic zones, and aerobic zones. Anaerobic, anoxic, and aerobic processes alternate, which can effectively remove nitrogen and phosphorus. At the same time, in the case of aerobic conditions, a large number of organic pollutants are effectively removed at the same time. After the sewage enters the secondary sedimentation tank from the biochemical system, solid-liquid separation is performed in the secondary sedimentation tank. After separation, it enters the high-efficiency sedimentation tank and deep bed filter. Considering that the land for construction of the advanced treatment section is limited, there is no need to use the land for contact with the disinfection tank. Therefore, the UV disinfection system shall be considered in the first and second phases, and the ultraviolet disinfection shall be used to achieve the first grade. A discharge standard requirements, and finally into training. The surplus sludge produced by biological treatment and chemical phosphorus removal is pumped to the dehydration room through the excess sludge pump. After dewatering by the dewatering and dewatering integrated machine, the mud cake with the moisture content of less than 80% is transported to the landfill site for sanitary landfill.

KEY WORDS: the improved A/A/O. Biochemical pools,the high-efficiency sedimentation tank,deep bed filter,the UV disinfection system

目 录

摘要 I

Abstract II

第 1 章 概述 1

1.1 项目名称 1

1.2 编制依据 1

1.2.1 编制原则 1

1.2.2 采用的规范和标准 1

第 2 章 污水处理厂现状及存在问题 3

2.1 歙县污水处理厂现状 3

2.1.1 一期现状 3

2.1.2 一期构筑物建设情况 5

2.1.3 一期设计进、出水水质 5

2.1.4 存在问题 6

第 3 章 总体设计 - 8 -

3.1 工程规模 - 8 -

3.2 设计进、出水水质 - 8 -

3.2.1 设计进水水质 - 8 -

3.2.2 设计出水水质 - 9 -

3.2.3 处理程度的确定 - 9 -

3.3 厂址选择 - 9 -

3.4 受纳水体 - 10 -

第 4 章 污水、污泥处理工艺的确定 - 11 -

4.1 二期扩建及提标改造工程总体思路 - 11 -

4.1.1 一期工程提标改造设计思路 - 11 -

4.1.2 二期扩建工程设计思路 - 11 -

4.1.3 一期、二期深度处理工程设计思路 - 11 -

4.2 污水处理工艺路线选择 - 11 -

4.2.1 污水处理工艺选择原则 - 11 -

4.2.2 污水生物处理可行性分析 - 11 -

4.2.3 本工程污水处理重点及难点分析 - 13 -

4.2.4 污水处理工艺选择路线 - 14 -

4.3 污水处理工艺方案的确定 - 15 -

4.3.1 一期改造工程方案 - 15 -

4.3.2 二期扩建工程方案 - 15 -

4.3.3 深度处理工艺方案 - 18 -

4.4 污泥处理处置方案确定 - 23 -

4.4.1 一期污泥出路 - 23 -

4.4.2 污泥处理工艺选择 - 23 -

4.4.3 污泥处置工艺 - 23 -

4.5 推荐方案污水处理工艺流程 - 24 -

第 5 章 工程设计 - 26 -

5.1 一期工程改造工艺设计 - 26 -

5.1.1 A/A/O生化一体池 - 26 -

5.1.2 鼓风机房 - 26 -

5.2 二期工程工艺设计 - 27 -

5.2.1 粗格栅及提升泵房(已建) - 27 -

5.2.2 细格栅及旋流沉砂池 - 27 -

5.2.3 改良A/A/O生化池 - 29 -

5.2.4 配水井及回流泵房 - 30 -

5.2.5 二沉池 - 31 -

5.2.6 消能井 - 31 -

5.2.7 储泥池 - 31 -

5.2.8 污泥脱水机房 - 32 -

5.2.9 鼓风机房 - 32 -

5.2.10 高效沉淀池 - 33 -

5.2.11 深床滤池 - 35 -

5.2.12 紫外消毒池 - 35 -

5.2.13 巴氏计量槽 - 36 -

第 6 章 主要设备 - 37 -

第 7 章 工程概算 - 42 -

7.1 概述 - 42 -

7.2 成本分析 - 42 -

第 8 章 结论 - 43 -

致 谢 - 44 -

参考文献 - 45 -

附录 - 46 -

概述

项目名称

项目名称:歙县污水处理厂二期扩建及提标改造工程。

编制依据

(1)歙县污水处理厂一期工程竣工资料及其它相关资料

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