5000吨印染废水处理工艺

河海大学环境工程毕业设计

摘 要

本设计中，污水处理规模为日处理生产废水5000m3/d，进水水质：COD为900mg/L，BOD为250mg/L , SS为180mg/L，色度为400度，pH为6，NH3-N为30mg/L。出水水质达到《纺织染整工业水污染物排放标准》（DB 32/670-2004）中规定的排放的要求，即COD≤100mg/L，BOD≤25mg/L，SS≤70mg/L，色度≤40度，pH为6~9，NH3-N≤15mg/L。

印染废水具有色度高，COD、BOD含量高，成分复杂，水质、水量变化剧烈等特点。因为印染废水属于难降解的废水，所以本设计采用水解酸化提高废水的可生化性。经过方案比选，本设计采用水解酸化- 接触氧化- 混凝工艺，其处理效果明显优于传统工艺，对BOD、COD、SS有很好的处理效果，并具有能耗低、产泥量少的特点，且剩余污泥可直接脱水。沉淀池后设置混凝沉淀池，作为三级处理，可获得较好的出水水质，使废水达标排放。

经技术经济分析，此方案投资总额 116万元，废水处理成本为0.64元/m3，有着良好的经济效益和社会效益。且节约用地、提高绿化、降低能耗的理念在设计中得到充分的实践，符合新时代环保的要求。

关键词：印染废水 水解酸化 生物接触氧化 混凝沉淀

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第1页 共66页 5000m/d印染废水处理工程设计

河海大学环境工程毕业设计

Abstract

In this design, the scale of sewage treatment is to dispose wastewater 5000m3 / d, water quality: COD 900mg / L to 250mg / L, BOD, SS 180mg / L, the color is 400 degrees, pH, NH3-N is 30mg / L Water quality can meet the emissions requirements specified in the textile industry standards for water pollutants (DB 32/670-2004), that of COD ≤ 100 mg / L of BOD ≤ 25mg / L, SS ≤ 70mg / L, and chroma ≤ 40 degrees, pH 6 ~ 9, NH3-N ≤ 15 mg / L.

High color printing and dyeing wastewater, the COD, high content of BOD, complex composition, water quality and quantity of rapid change and so on. Dyeing wastewater is biodegradable wastewater, so the design uses a hydrolysis acidification to improve the wastewater biodegradability. After the program than the election, this design uses a hydrolysis acidification - contact oxidation - coagulation process, the treatment effect was better than the traditional process, BOD, COD, the SS has a good treatment effect, and has low energy consumption, sludge production is less features, and excess sludge can be dehydration. Set after coagulation and sedimentation, sedimentation tanks, as a tertiary treatment, to obtain better water quality, wastewater discharge standards.

Technical and economic analysis of this scenario, the total investment of 116 million wastewater treatment cost is 0.64yuan / m3, has a good economic and social benefits. And land conservation, and increase afforestation, the idea of reducing energy consumption in the design to be fully practice, in line with the requirements of a new era of environmental protection.

Keywords: printing and dyeing wastewater ; hydrolysis acidification ; biological oxidation ; coagulation and sedimentation

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第2页 共66页 5000m/d印染废水处理工程设计

河海大学环境工程毕业设计

目 录

第一篇 设计说明书 .................................................................. 5

1 概述 ......................................................................... 5

1.1 设计任务 ............................................................... 5 1.2 设计依据 ............................................................... 5 1.3 区域概况 ............................................................... 6 2 污水处理方案设计 ............................................................. 6

2.1 规模与处理程度的确定 ................................................... 6 2.2 污水处理方案的确定 ..................................................... 6 3 污水处理厂工艺设计 .......................................................... 11

3.1 污水处理构筑物的设计 .................................................. 11 3.2 污泥处理系统设计 ...................................................... 18 4 污水处理厂总体布置 .......................................................... 19

4.1 平面布置及总平面图 .................................................... 19 4.2 各构筑物高程布置 ...................................................... 21 5 工程概算与成本分析 .......................................................... 22

5.1 工程概况 .............................................................. 22 5.2 编制依据 .............................................................. 22 5.3 编制原则 .............................................................. 22 5.4 投资概算 .............................................................. 23 6 厂区概况 .................................................................... 23

6.1 厂区污水 .............................................................. 23 6.2 噪声 .................................................................. 23 6.3 固体废弃物 ............................................................ 24 6.4 安全生产和消防设施 .................................................... 24 6.5 经营管理 .............................................................. 25 6.6 人员编制 .............................................................. 25 7 结论及建议 .................................................................. 25 8 参考文献 .................................................................... 26 第二篇 设计计算书 ................................................................. 27

1 设计资料 .................................................................... 27

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第3页 共66页 5000m/d印染废水处理工程设计

河海大学环境工程毕业设计

1.1 设计题目和任务 ........................................................ 27 1.2 设计进出水水质及处理程度 .............................................. 27 1.3 污水处理工艺流程 ...................................................... 28 2 污水处理构筑物设计计算 ...................................................... 28

2.1 格栅 .................................................................. 28 2.2 提升泵 ................................................................ 31 2.3 调节池 ................................................................ 31 2.4 水解酸化池 ............................................................ 33 2.5 生物接触氧化池 ........................................................ 35 2.6 竖流式沉淀池 .......................................................... 40 2.7混凝反应池 ............................................................ 44 2.8 混凝沉淀池 ............................................................ 47 2.9 消毒池 ................................................................ 48 2.10 鼓风机房 ............................................................. 50 3 污泥处理系统设计计算 ........................................................ 50

3.1 集泥井 ................................................................ 50 3.2 污泥浓缩池的设计 ...................................................... 51 3.3 污泥脱水系统设计 ...................................................... 53 4 污水处理厂总体布置 .......................................................... 55

4.1 平面布置及总平面图 .................................................... 55 4.2 各构筑物高程布置 ...................................................... 57 5 工程概算及成本分析 .......................................................... 60

5.1 设备的选型 ............................................................ 60 5.2 工程投资概预算 ........................................................ 60 5.3 劳动定员、运行管理 .................................................... 62 6 参考资料 .................................................................... 63

6.1 规范标准 .............................................................. 63 6.2 参考文献 .............................................................. 64

致 谢 .............................................................................. 65 附 图 .............................................................................. 66

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