10万吨每天城市生活污水厂毕业设计

毕 业 设 计

题 目： 运城10万吨/ d城市污水处理厂

学 院： 市政与环境工程学院 专 业： 环境工程 姓 名： XXX 学 号：指导老师： 冯兴华 完成时间：

摘要

本设计的主要任务是运城市污水处理厂的设计，设计规模为100000m3/d，采用了卡鲁赛尔氧化沟处理工艺。该污水厂的污水处理流程为：从格栅到泵房到沉砂池，进入氧化沟，二沉池，消毒池，计量槽，最后出水；污泥的流程为：从二沉池排出的剩余污泥首先进入集泥池，然后进入浓缩池，进行污泥浓缩，然后进入贮泥池，经过浓缩的污泥再送至带式压滤机，进一步脱水后，运至垃圾填埋场。 本设计与现行的城市生活污水处理工艺相比具有明显的优势：（1）不设初沉池，有机性悬浮物在氧化沟内能达到好氧稳定的程度。（2）BOD负荷低，使氧化沟具有对水温，水质，水量的变动有较强的适应性，污泥产率低，勿需进行硝化处理。（3）脱氮效果还能进一步提高。（4）电耗较小，运行费用低。

设计结果表明：污水处理厂处理后的出水达到《污水综合排放标准》(GB8978-1996)二级标准。

关键词：城市污水；卡鲁赛尔氧化沟工艺；脱氮除磷；工艺设计

Abstract

The main task of this design is the sewage treatment plant in Yuncheng

City, design size 100000m3 / d, with the Carrousel oxidation ditch treatment process. The sewage treatment plant process: from the pumping station to the grit chamber, into the oxidation ditch, secondary sedimentation tank, the final effluent; sludge process: from the secondary sedimentation tank sludge discharged from the first into the concentration tank, for pollution soil enrichment, and then into the storage basins, was concentrated in the sludge and then sent to the belt filter press, and further dehydrated, transported to the landfill.

The design of the existing urban wastewater treatment process has significant advantages compared to: (1) without first settling tank, organic suspended solids in aerobic oxidation ditch to achieve a stable level. (2) BOD load is low, so that oxidation ditch has on water temperature, water quality, water movement has strong adaptability, low sludge yield, Needless to nitrification. (3) can further improve nitrogen removal. (4) low power consumption, low operating costs.

Design results show that: the sewage treatment plant treated effluent to achieve "intergrated wastewater discharge standard" (GB8978-1996) in a scend standard.

Key words：Urban sewage; Carrousel 2000 oxidation ditch process; nitrogen

and phosphorus removal; Process Design

目录

摘要 ...................................................................................................................................................... I Abstract ................................................................................................................................................ II 1设计任务及资料 ............................................................................................................................... 1

1.1设计任务 ................................................................................................................................ 1 1.2设计资料 ................................................................................................................................ 1

1.2.1项目概况...................................................................................................................... 1 1.2.2工程范围及建设规模 .................................................................................................. 1 1.2.3污水来源...................................................................................................................... 1 1.2.4污水水质...................................................................................................................... 1 1.2.5处理后水质要求 .......................................................................................................... 1 1.3设计要求 ................................................................................................................................ 2

1.3.1污水处理厂的设计原则 .............................................................................................. 2 1.3.2污水处理工程运行过程中应遵循的原则 .................................................................. 2

2设计方案论证 ................................................................................................................................... 3

2.1 工艺方案分析....................................................................................................................... 3 2.2 目前常用的城市污水处理技术 ........................................................................................... 3 2.3 工艺的比选 .......................................................................................................................... 5 2.4 工艺流程图 .......................................................................................................................... 6 2.5设计污水水量........................................................................................................................ 6 3一级处理构筑物的计算.................................................................................................................... 8

3.1格栅 ....................................................................................................................................... 8

3.1.1格栅的设计 .................................................................................................................. 8 3.1.2设计参数...................................................................................................................... 8 3.1.3中格栅设计计算 .......................................................................................................... 9 3.1.4细格栅设计计算 ........................................................................................ …… 此处隐藏：16326字，全部文档内容请下载后查看。喜欢就下载吧 ……