Although the B/C value of this project is 0.5, it is easily degradable, but because the COD index of this reference case is above 2000mg/L, the design index has reached 4000mg/L, and the scope belongs to high-concentration organic wastewater. Therefore, this design will be defined as the category of refractory organic wastewater. According to experience and techniques implemented in various channels through case studies and books, the A/O method has always been favored in the research of refractory organic wastewater treatment and is an ideal treatment method. Therefore, A/O is positioned in the main process. First design the wastewater into the collection basin and transfer it through the lift pump, drive into the coagulation sedimentation tank, remove the insoluble suspended particles in the pool, avoid the interference of the subsequent structures, and add the medicine adding equipment to neutralize the sulfate in the wastewater. Forming sediments that are difficult to dissolve in waste water; afterwards, it can be connected to a regulating tank, which can control the water quality and water volume, which is more conducive to the treatment of subsequent structures; and it can be further reduced by the UASB (Upper Surface Flow Anaerobic Reactor) to reduce COD and BOD. Concentration, in addition can also improve a certain degree of biochemical, easy to handle; then use the main A / O process for wastewater treatment, its advantage is that, in addition to the degradation of organic pollutants, it also has a certain function of nitrogen and phosphorus removal [[ 2]; The last treatment process is the membrane bioreactor (MBR). The MBR is highly efficient as an advanced treatment. The MBR is used for advanced treatment to minimize the concentration of pollutants in the effluent to meet the effluent standards. The final sludge discharge design sludge pumping station, sludge thickening tank, and sludge dewatering plant should properly handle the discharged sludge.

The subject can achieve high-efficiency treatment of refractory organic wastewater, has the advantages of high biochemical, strong process stability, good treatment effect, low sludge yield, economic feasibility, and wide application range.

The hard-degradable wastewater after treatment can meet Class IB standard of Integrated Wastewater Discharge Standard (GB18918-2002), namely: COD≤60mg/L, BOD5≤20mg/L, SS≤20mg/L, NH3-N≤15, Chroma ≤30, PH=6~9.

The use of reasonable technology for refractory wastewater, comprehensive treatment, reducing its harm to the environment, and the use of wastewater treatment and recycling, is conducive to the rapid development of mankind, while responding to the country's sustainable development call, in line with China's national conditions.

Key words: conditioning tank; UASB; A/O ; MBR;

目 录

1 绪论 1

1.1 设计背景 1

1.2 设计要求与资料 1

1.2.1设计资料 1

1.2.2设计要求 1

1.3设计目标 2

2 处理工艺选择 3

2.1处理的基本方法 3

2.2废水处理工艺流程对比 4

2.2.2吸附-生物降解活性污泥工艺（A-B工艺系统） 5

2.2.3 A/O法处理工艺 6

2.2.4 A2/O工艺 7

2.2.5 SBR活性污泥法 8

2.2.6 氧化沟（OD）工艺 9

2.3 设计方案的确定 10

2.4预计可达到效果 10

3 设计说明 11

3.1 工艺说明 11

3.1.1集水池及污泥提升泵房 11

3.1.2沉淀池 11

3.1.3调节池 11

3.1.4 UASB反应池 11

3.1.5  A/O生物反应池 12

3.1.6 膜生物反应器（MBR） 12

3.1.7 污泥泵房 12

3.1.8贮泥池 12

3.1.9污泥浓缩池 12

4设计计算 13

4.1 污水处理效果计算 13

4.2 构筑物计算 14

4.2.1 选泵 14

4.2.2 集水池 15

4.2.3 混凝沉淀池设计 15

4.2.4 调节池的设计 17

4.2.5  UASB的设计 18

4.2.6  A/O生物反应池的设计 20

4.2.7 膜生物反应器（MBR）的设计 24

4.3 污泥处理计算 25