河海大学环境工程专业毕业设计
摘 要
针对印染废水的水质特点，本文采用水解酸化与接触氧化相结合的生化工艺对废水进行处理。水解酸化和好氧接触设计停留时间均为10h，运行结果表明，水解酸化单元可有效提高废水的可生化性，废水经水解酸化后B/C值可从0.2～0.3提高至0.4左右，有效保证了好氧接触处理效果。根据环保监测结果，COD一般在80mg/L，BOD在10mg/L以下，COD去除率80％以上，BOD去除率90％以上。
废水处理厂设计规模3500m3/d，污水水质：COD=2370mg/L，BOD5=720mg/L，pH=12.40，SS=57mg/L,色度512倍。经处理后，应达到下列出水水质：COD≤100mg/L，BOD≤25mg/L，色度≤40倍，pH在6～9，SS≤70mg/L，达污水排放一级标准。经设计可知：COD去除率为96.1%，BOD去除率为97.5%，SS去除率为92%，色度去除率为94%。
经技术经济分析，此方案投资总额430万元，废水处理成本为0.97 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： 纺织印染废水 水解酸化 生物接触氧化
3500m3/d印染废水处理工程设计 第 1 页 共 61页
河海大学环境工程专业毕业设计
ABSTRACT
The hydrolytic acidification section could improve the biochemical degradability effe Aiming at the characteristics of printing and dyeing wastewater, a biochemical technological process of hydrolytic acidification integrating contact oxidation was applied to treatment of the printing and dyeing wastewater; the HRT for the both were 10h respectively. The operating results showed ctively; after hydrolytic acidification, the wastewater’s B/C value could rise to about 0.4 from 0.2-0.3, effectively ensuring the treating effect of aerobic contact. According to the monitoring results by the department of environmental protection, COD and BOD5 were below 80mg/L and 10mg/L respectively; COD and BOD5removal rates were over 80% and over 90% respectively.
The liquid waste processing factory designs scale 3500 m3/d, its raw water fluid matter according to square and present production scale in factory and development request, after with factory square, native environmental protection section consultation certain following design fluid matter amount of water: COD=2370mg/L BOD5=720mg/L pH=12.40 SS=574 mg/L Color degree 512 times.After handles, it should attain the a water fluid matter below: COD≤100mg/L,BOD≤25mg/L,Ph=6～9,SS≤70mg/L,Color degree≤40 times,reaching the dirty water exhausts a class standard.Through design then η COD=96.1%,η BOD=97.5%,η SS=92%,color is a 94%.
It was analyzed by technique economy, this project investment total amount to 4,300,000 yuan, liquid waste processing cost is 0.97 yuan/ m3, have got the good and economic performance with social performance.And the economy uses a ground of, increase the green turn, lowering can consume of principle is in design fulfillment getting well, meet the request of the modern.
Keywords: textile printing wastewater hydrolytic；acidification reactor；organism contact oxidizes
3500m3/d印染废水处理工程设计 第 2 页 共 61页
河海大学环境工程专业毕业设计
目 录
第一篇 设计说明书 ..................................................................................................................................... 6 1概述 ......................................................................................................................................................... 6 1.1印染废水 .......................................................................................................................................... 6 1.2印染废水处理技术........................................................................................................................... 6 2污水处理厂设计 ................................................................................................................................... 11 2.1规模与处理程度的确定 ................................................................................................................. 11 2.2气象与水文条件 ............................................................................................................................ 12 2.3厂区概括 ........................................................................................................................................ 12 2.4设计依据 ........................................................................................................................................ 12 3污水处理厂方案的确定 ....................................................................................................................... 13 3.1确定污水处理方案的原则 ............................................................................................................. 13 3.2污水处理方案比选......................................................................................................................... 13 3.3设计方案的确定 ............................................................................................................................ 14 4污水处理厂的工艺设计 ....................................................................................................................... 15 4.1格栅 ................................................................................................................................................ 15 4.2筛网 ................................................................................................................................................ 16 4.3调节池 ............................................................................................................................................ 16 4.4水解酸化池 .................................................................................................................................... 17 4.5 生物接触氧化池 ........................................................................................................................... 17 4.6 二沉池 ........................................................................................................................................... 18 4.7混凝池 ............................................................................................................................................ 19 4.8斜板沉淀池 .................................................................................................................................... 19 4.9污泥浓缩池 .................................................................................................................................... 19 4.10污泥脱水机房 .............................................................................................................................. 20 4.11污泥管道 ....................................................................................................................................... 21 5污水处理厂总体布置 ........................................................................................................................... 21 5.1平面布置 ........................................................................................................................................ 21 5.2高程布置 ........................................................................................................................................ 22 3500m3/d印染废水处理工程设计 第 3 页 共 61页
河海大学环境工程专业毕业设计
6工程概算与成本分析 ........................................................................................................................... 23 6.1工程投资概预算 ............................................................................................................................ 23 6.2设备费用 ........................................................................................................................................ 23 6.3管材附件费用 ................................................................................................................................ 23 6.4其他费用 ........................................................................................................................................ 23 7编制依据 ............................................................................................................................................... 23 第二章 设计计算书 ................................................................................................................................... 24 1设计资料 ............................................................................................................................................... 24 1.1设计题目 ........................................................................................................................................ 24 1.2进出水水质 .................................................................................................................................... 24 2污水厂处理规模及程度的确定............................................................................................................ 24 2.1污水处理厂处理规模..................................................................................................................... 24 2.2污水处理程度 ................................................................................................................................ 24 3污水厂处理构筑物设计计算................................................................................................................ 24 3.1格栅 ................................................................................................................................................ 24 3.2筛网 ................................................................................................................................................ 27 3.3调节池 ............................................................................................................................................ 27 3.4水解酸化池 .................................................................................................................................... 30 3.5生物接触氧化池 ............................................................................................................................ 32 3.6二沉池 ............................................................................................................................................ 37 3.7混凝池 ............................................................................................................................................ 39 3.8斜板沉淀池 .................................................................................................................................... 42 3.9污泥浓缩池 .................................................................................................................................... 44 3.10污泥脱水机房 .............................................................................................................................. 46 3.11污泥管道 ....................................................................................................................................... 48 4污水处理厂总体布置 ........................................................................................................................... 48 4.1平面布置 ........................................................................................................................................ 48 4.2主要构筑物和建筑物的尺寸 ......................................................................................................... 48 4.3高程布置 ........................................................................................................................................ 49 3500m3/d印染废水处理工程设计 第 4 页 共 61页
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