(完整版)A1O脱氮工艺毕业设计

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摘要

炼油污水中通常含有大量的油、BOD5、COD、NH4-N、酚及其它杂质等。为保证出水达到排放标准，必须对其进行处理。

本设计采用A1O脱氮工艺对隔油后的炼油污水进行生化处理，即采用的是前置反硝化生物脱氮工艺。设计中主要处理设施有缺氧池、好氧池、二沉池、混凝反应池、混凝沉淀池、监测池等。A1O脱氮工艺主要包括生物除碳、好氧硝化、缺氧生化、混凝沉淀四个部分。在反应工序中，通过硝化菌的作用、将氨氮转化为亚硝态氮、硝态氮，再通过反硝化作用将硝态氮转化为氮气，从而达到从废水中脱氮的目的。二沉池出水进入混凝反应池，通过向混凝反应池中投加无机复合絮凝剂，使污水中的杂质和悬浮物沉降，进一步提高出水水质。

本工艺系统流程简单，不需外加碳源，基建费用与运行费用低，处理效果好，易于管理。

关键词：炼油污水；硝化；反硝化；混凝

Abstract

The oil-refining sewage usually includes a large amount of oil, BOD5, COD, NH4-N, phenylic acid and other impurities, etc. In order to achieve the effluent standard, the oil-refining sewage must be disposed.

The A1O denitrification craft is adopted to carry out biochemical treatment for refinery sewage after oil removal, i.e., the pre-denitrification biotreatment process. The main processing establishments include anoxic basin, aerobic basin, secondary sedimentation basin, coagulation basin, coagulative precipitation tank, monitoring basin and so on. And the A1O denitrification craft is made of four sections of biological decarbonization, aerobic nitration, anoxic biochemistry, and coagulative precipitation. In reaction procedure, the ammonia nitrogen is transformed into the nitrite nitrogen and the nitrate by nitrification, and then the nitrate nitrogen is transformed into nitrogen by denitrification, thereby the aim that the nitrogen is removed away from sewage comes true. The yielding water of secondary sedimentation basin comes into coagulation basin;

the impurities and suspended substance are precipitated by adding inorganic compound flocculating agent in coagulation basin, to improve the quality of water.

The systematic flow of craft is simple, does not need extra carbon source, and the construction cost and operating cost are low, so it is of good effect of treatment and easily management.

Key words: oil-refining sewage; Nitrification; Denitrification; Coagulation

目录

第一章绪论 (1)

第二章主体构筑物的设计计算 (3)

2.1缺氧池 (3)

2.1.1设计说明 (3)

2.1.2缺氧池进水水质的确定 (3)

2.1.3可生化性及是否加碳源的评价： (4)

2.1.4 缺氧池出水水质的确定 (4)

2.1.5池体计算 (5)

2.1.6细节设计 (6)

2.2好氧池 (7)

2.2.1设计说明 (7)

2.2.2设计参数 (7)

2.2.3反应池体设计计算 (7)

2.2.4剩余污泥量排放量 (10)

2.2.5进出水系统设计计算 (11)

2.2.6混合液回流设计 (13)

2.2.7曝气系统设计计算 (14)

2.2.8细节设计 (17)

2.3二沉池 (18)

2.3.1设计说明 (18)

2.3.2设计参数 (18)

2.3.3池体设计计算 (18)

2.3.4进出水系统计算 (20)

2.3.5排泥部分设计计算 (21)

2.3.6细节设计 (22)

2.4机械混合池 (23)

2.4.1设计说明 (23)

2.4.2设计要点 (23)

2.4.3池体设计计算 (23)

2.4.4细节设计 (25)

2.5机械混凝反应池 (25)

2.5.1设计说明 (25)

2.5.2设计要点。 (26)

2.5.3池体设计计算 (26)

2.5.4细节设计 (31)

2.6三级沉淀池 (31)

2.6.1设计说明 (31)

2.6.2设计参数 (31)

2.6.3池体设计计算 (32)

2.6.4进出水系统计算 (33)

2.6.5细节设计 (35)