某味精厂淀粉800m3d废水处理工程设计

某味精厂淀粉800m3/d废水处理工程设计

1. 概述 (5)

1.1. 设计任务 (5)

1.2. 设计依据 (5)

1.2.1 规范标准 (5)

1.3 厂区地形 (5)

1.4 自然条件 (6)

1.4.1 污水水质特征 (6)

1.4.2 气象资料 (6)

1.4.3 工程地质资料 (6)

2. 污水处理工艺设计 (7)

2.1. 规模与处理程度的确定 (7)

2.1.1. 处理规模 (7)

2.1.2. 设计进出水水质 (7)

2.2. 污水处理工艺方案的确定 (8)

2.2.1. 废水水质分析 (8)

2.2.2. 工艺方案选择 (8)

2.2.3. 污水处理方案的比选 (8)

2.2.4. 设计方案的确定 (10)

2.3. 污水处理站工艺设计 (11)

2.3.1. 格栅 (11)

2.3.2. 集水井 (11)

2.3.3. 一级泵房 (12)

2.3.5. 调节池 (12)

2.3.6. UASB反应器 (12)

2.3.7. 曝气沉淀池 (12)

2.3.8. SBR反应器 (13)

2.3.9. 二级泵房 (13)

2.4. 污泥部分工艺设计 (13)

2.4.1. 集泥井 (13)

2.4.2. 污泥重力浓缩池 (13)

2.4.3. 污泥脱水间 (13)

3. 污水站总平面布置 (13)

3.1. 平面布置及总平面图 (13)

3.2. 平面布置的一般原则 (14)

3.3. 污水处理站平面布置的具体内容 (14)

3.4. 高程布置 (15)

4. 毕业设计计算书 (17)

4.1. 设计资料 (17)

4.1.1. 设计题目及任务 (17)

5. 污水站设计计算 (17)

5.1. 污水处理站处理规模 (17)

5.1.1. 污水处理程度 (18)

5.2. 污水处理站工艺设计 (18)

5.3. 污水处理构筑物的设计计算 (20)

5.3.1. 格栅 (20)

5.3.2. 集水井 (21)

5.3.4. 气浮池 (23)

5.3.5. 调节池 (27)

5.3.6. SBR反应器 (39)

5.3.7. 鼓风机房设计 (43)

5.3.8. 二级泵房 (44)

5.4. 污泥处理系统计算 (45)

5.4.1. 集泥井 (45)

5.4.2. 污泥重力浓缩池 (46)

5.4.3. 污泥脱水间 (47)

6. 污水处理站的平面布置和高程布置 (48)

6.1. 平面布置 (48)

6.2. 高程布置 (48)

某味精厂淀粉800m3/d废水处理工程设计

摘要

我国生物化工行业经过一系列的发展，已具备了一定的基础。特别是改革开放以后，生物化工行业的发展迈向了一个新的阶段。但是，随着生物化工的发展，其环境污染问题也日趋严重，已经成为我国的环境污染主要来源。在生物化工的各个行业中，由于淀粉、啤酒、酒精、味精、柠檬酸、抗生素的产值较大，环境污染严重，所以尤其被人们重视。

食品工业是以粮食和农副产品为主要原料的加工工业。这类行业用水量和废水排放量都很大，尤其以淀粉工业废水的排放量占首位。我国淀粉行业有600 多家企业。在国内，每生产13

m淀粉就要产生10～203m废水，有的甚至更多。废水中主要含有淀粉、糖类、蛋白质、废酸和废碱等污染物，随生产工艺的不同，废水中的COD 浓度在2000～20000mg/l 之间。这些淀粉废水若不经过处理直接排放，其水中所含有的有机物，进入水体后会迅速消耗水中的溶解氧，造成水体缺氧而影响鱼类和其他水生动物的生存，同时废水中悬浮物易在厌氧条件下分解产生臭气，恶化水质。

味精厂以玉米为原料生产淀粉，然后以淀粉为原料生产味精，生产过程中排放大量淀粉废水，影响周围环境，为适应当地环保工作以及工程项目的需要应符合同时设计、同时施工、同时投入使用的三同时原则，使出水水质达到国家城镇污水处理厂污染物排放二级标准。

根据某味精厂排放的废水特点及提供的占地面积，本设计方案通过气浮—UASB—序批式活性污泥处理工艺和气浮—UASB—生物接触氧化处理工艺的对比，选择一套高效，稳定和经济技术合理的处理工艺，保证废水达到国家污水综合排放二级标准，同时使投资、占地面积、运行管理度达到最佳设置。

关键词：味精废水淀粉 USAB

Abstract

China's bio chemical industry after a series of development, already have a foundation. Especially after the reform and opening up, the development of bio chemical industry towards a new stage. However, with the development of bio chemical industry, environmental pollution problems have become increasingly serious, has become the main source of environmental pollution in china. In the bio chemical industries, because the starch, beer, alcohol,monosodium glutamate, citric acid, antibiotics, the output value of large, serious environmental pollution, soespecially paid attention to by people.

The food industry is the processing industry for food and agricultural products as the main raw material. Water consumption and wastewater discharge this kind of industry is very big, especially in the discharge of wastewater from starch industry accounted for the first. Starch industry in China has more than 600 enterprises. In China,each producing 1 starch to produce 10 ~ 20 wastewater, some even more. Wastewater containing mainly starch,carbohydrate, protein, acid and alkali waste and other pollutants, with the production process, wastewater COD concentration in the range of 2000 ~ 20000mg/l. If these starch wastewater directly discharged without any treatment, the water contained organic matter, dissolved oxygen into the water after a quick consumption of water,cause and effect and other aquatic animal fish aquatic hypoxia survival, and suspended solids in wastewater inanaerobic conditions decomposition produce odor, water quality deterioration.

Monosodium glutamate factory to the production of corn based starch as raw material, and then using starch asraw material production of monosodium glutamate, a lot of starch wastewater discharge in the production process,impact on the surrounding environment, should be three also conform to the contract design, construction and put into use at the same time, the principle for the need to adapt to the local environmental protection work and project, to make the effluent quality meet the national urban wastewater treatment factory two emission standard.