论文总字数：27196字

摘 要

本设计中，某印染废水处理厂日处理印染废水15000m³/d，进水水质为：COD= 1200 mg/L，BOD₅ = 400 mg/L，pH =9~11，氨氮= 30mg/L，TSS = 360 mg/L，TP = 2mg/L，色度= 450。要求出水水质达到国家《纺织染整工业水污染物排放标准》（GB4287-2012）直排标准，即COD ≤ 80mg/L，BOD₅ ≤ 20 mg/L，pH = 6~9，氨氮 ≤ 10mg/L，TSS ≤ 20 mg/L，TP ≤ 0.5mg/L，色度≤ 30。

本设计中废水B/C=400/1200=0.33，虽具有一定的可生化性，但可生化性较差，故需令废水进入水解酸化池改善可生化性，后接生物接触氧化池，为了得到更好的水质，生化处理后再经曝气生物滤池进行深度处理去除COD和色度，达标排放。

关键词：印染废水；水解酸化；生物接触氧化；曝气生物滤池

Study of a Printing and Dyeing Wastewater Treatment Plant

Abstract

In this design, a printing and dyeing wastewater treatment plant daily treats 15000m ³/d of printing and dyeing wastewater. The influent water quality is: COD = 1200 mg/L, BOD₅ = 400 mg/L, pH = 9~11, ammonia nitrogen = 30 mg/L, TSS = 360 mg/L, TP = 2 mg/L, chroma = 450. Require that the effluent quality meet the national “straight standard for textile dyeing and finishing industry water pollutants” (GB4287-2012), that is, COD ≤ 80mg/L, BOD₅ ≤ 20 mg/L, pH = 6~9, ammonia nitrogen ≤ 10mg/L, TSS ≤ 20 mg/L, TP ≤ 0.5 mg/L, chroma ≤ 30.

Printing and dyeing wastewater has the characteristics of high chroma, high COD, BOD ₅ content, complex composition, and drastic changes in water quality and quantity. Because the printing and dyeing wastewater is hard to degrade, the design uses hydrolytic acidification to improve the biodegradability of the wastewater. Through the comparison of the schemes, this design adopts “hydrolytic acidification-biological contact oxidation” as the biochemical treatment and adopts the aeration biological filter process. As an advanced treatment, the pollutants are further removed, so that the effluent meets the standard emission.

Key Words: printing and dyeing wastewater; hydrolytic acidification; biological contact oxidation; biological aerated filter

目 录

摘 要 I

Abstract II

1.1 设计题目 1

1.1.1 设计数据 1

第二章 处理工艺流程的确定 3

2.1 工艺流程的比选 3

2.2.1活性污泥法 3

2.2.2氧化沟 3

2.2.3生物接触氧化法 4

2.2 工艺流程的确定 5

2.3 各构筑物的处理效率 6

第三章 污水处理系统的设计计算 7

3.1格栅 7

3.2调节池 10

3.3混凝反应池 12

3.4 平流式初沉池 16

3.5 水解酸化池 19

3.6 生物接触氧化池 21

3.7 辐流式二沉池 25

3.8 曝气生物滤池 28

3.9 清水池 31

第四章 污泥处理系统的设计 32

4.1 贮泥池 32

4.2 污泥浓缩池 32

4.3 污泥脱水 34

第五章 厂区的平面布置和高程布置 36

5.1平面布置 36

5.1.1各构筑物的布置 36

5.2高程布置 37

5.2.1 管径计算 37

5.2.3构筑物的水头损失计算 43

5.2.4 标高计算 45

参考文献 47

致谢 48

第一章 概述

1.1 设计题目

某印染废水处理厂的工艺研究

设计数据

水量：15000m³/d

进水水质：

表1-1 进水水质一览表

出水水质：

要求出水水质达到国家《纺织染整工业水污染物排放标准》（GB4287-2012）直排标准，如下表：

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