毕业设计(论文)10万吨污水处理厂设计

毕业设计（论文） （2010届） 题 目 昆山市10万t/d城市污水处理厂工艺设计

二○一○年六月

昆山市10万t/d城市污水处理厂工艺设计 摘 要：本设计的主要任务是昆山市污水处理厂的设计，设计规模为100000m3/d，采用了Carrousel 2000氧化沟处理工艺。污水处理工艺为Carrousel 2000氧化沟工艺，污泥处理工艺为污泥浓缩脱水工艺。该污水厂的污水处理流程为：从泵房到沉砂池，进入氧化沟，二沉池，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）具有独特的水力流动特点，有利于活性污泥的生物凝聚作用（2）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。（3）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。（4）脱氮效果还能进一步提高。（5）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《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。

关键词：城市污水；Carrousel 2000氧化沟工艺；脱氮除磷；工艺设计

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100 000 t / d wastewater treatment plant process

design in Kunshan City

Abstract：The main task of this design is the sewage treatment plant in Kunshan City, design size 100000m3 / d, with the Carrousel 2000 oxidation ditch treatment process. Sewage treatment process for the Carrousel 2000 oxidation ditch process, sludge treatment process for the sludge thickening and dewatering 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) has a unique hydraulic flow characteristics, are conducive to active sludge biological cohesion (2) without first settling tank, organic suspended solids in aerobic oxidation ditch to achieve a stable level. (3) 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. (4) can further improve nitrogen removal. (5) low power consumption, low operating costs.

Design results show that: the sewage treatment plant treated effluent to achieve

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

removal; Process Design

目 录

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摘要·····································································Ⅰ 目次·····································································Ⅲ 1 绪论····································································1 1.1 设计参数及依据························································1 1.1.1 设计背景·····························································1 1.2 设计原则·······························································2 1.3 设计依据·······························································2 2 污水处理工艺流程比较及选择··············································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············································4 2.3 工艺的比选····························································5 2.4 工艺流程图·····························································5 3 工艺流程设计计算························································6 3.1 设计流量······························································6 3.2 中格栅································································6 3.3 进水泵房······························································7 3.3.1 水泵选择·····························································7 3.4 细格栅································································8 3.4.1 工艺尺寸·····························································8 3.5 沉砂池································································9 3.5.1设计参数·····························································9 3.5.2 沉砂池尺寸··························································10 3.5.3 集砂量及排砂设备····················································11 3.5.4 曝气系统····························································11 3.6 厌氧池································································12 3.6.1 设计参数····························································12 3.6.2 设计计算····························································12 3.7 氧化沟································································13 3.7.1 设计参数····························································13 3.7.2 设计要点····························································13 3.7.3 设计计算····························································15 3.8 二沉池································································19 3.8.1 设计参数····························································19 3.8.2 设计尺寸····························································20 3.8.3 刮泥设备····························································23 3.8.4 二沉池计算示意图····················································23 3.9 接触消毒池···························································23 3.9.1 设计参数····························································23

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