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石家庄某城市污水处理厂工艺设计42


青岛理工大学毕业设计(论文)用纸

摘 要
本次毕业设计的题目是石家庄某城市污水处理厂工艺设计,主要任务是工艺 流程选择及构筑物设计和技术。该污水处理厂工程,总规模达到 70000m3 /d。原 污 水 中 CODcr 的 浓 度 为 950mg/L, BOD5 的 浓 度 为 430mg/L,SS 的 浓 度 为 300mg/L,NH3-N 的浓度为 20,TP 的浓度为 7mg/L,要求处理后的排放水要严格达 到《城镇污水处理厂污染物排放标准》 GB18918-2002 中一级 B 排放标准,即 CODcr ≤60mg/L,BOD5 ≤20mg/L,SS≤20mg/L,NH3-N≤8,TP≤ 1.0mg/。该污水厂的 污水处理流程为:从沉砂池进入 SBR 池,接触池,最后出水,整个工艺具有节省 费用、技术成熟、效果稳定、保证出水达到排放要求、工艺简单自动化程度高等 优点

关键词:污水处理厂,SBR,工艺

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青岛理工大学毕业设计(论文)用纸

Abstract

The topic of this graduation design is shijiazhuang city sewage treatment plant process design technology, the main task is to process

selection and structure design and technology. The sewage treatment plant project, the total scale of 70000 m ^ 3 / d. COD_cr concentration in the raw sewage is 950 mg/L, the concentration of BOD_5 is 430 mg/L, the concentration of SS is 300 mg/L, the concentration of NH3 - N is 20, TP concentration of 7 mg/L, after processing to discharge water to strict to reach the town sewage treatment plant pollutant discharge standard "level 1 B in GB18918-2002 emission standards, namely COD_cr 60 mg/L, or less BOD_5 20 mg/L, or less SS acuities were 20 mg/L, NH3 - N 8 or less, TP 1.0 mg/or less. The sewage plant of wastewater treatment process for: from grit chamber into the SBR pool, pool, the water, the whole process has cost saving, mature technology, stable effect

Key words: sewage treatment

plant ,SBR,the craft

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青岛理工大学毕业设计(论文)用纸

目录
第 1 章 概况 ............................................................................................................................................ 7 1.1 石家庄概况与发展 ....................................................................................................................... 7 1.2 设计原始资料 ............................................................................................................................... 7 1.2.1 设计参数 .............................................................................................................................. 8 第 2 章 工艺设计方案的确定及构筑物的选择 .................................................................................. 10 2.1 污水处理厂的选址 ..................................................................................................................... 10 2.2 污水处理工艺流程的确定 ......................................................................................................... 10 2.2.1 工艺比较分析..................................................................................................................... 11 2.2.2 工艺流程方案确定 .............................................................................................................. 14 2.3 主要构筑物的选择 ..................................................................................................................... 15 2.3.1 格栅 .................................................................................................................................... 15 2.3.2 沉砂池 ................................................................................................................................ 16 2.3.3 初沉池 ................................................................................................................................ 16 2.3.4 曝气池 ................................................................................................................................ 16 2.3.5 消毒接触池......................................................................................................................... 17 2.3.6 污泥浓缩池......................................................................................................................... 17 2.3.7 贮泥池 ................................................................................................................................ 17 2.3.8 消化池 ................................................................................................................................ 17 2.3.9 污泥脱水 ............................................................................................................................ 17 第 3 章 污水处理系统工艺设计 .......................................................................................................... 19 3.1 格栅的计算 ................................................................................................................................. 19 3.1 .1 粗格栅的计算..................................................................................................................... 19 3.1.2 细格栅的计算..................................................................................................................... 22 3.2 曝气沉砂池的计算................................................................................................................ 24 3.3 辐流式初沉池计算 ..................................................................................................................... 28
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