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污泥在二沉池沉淀后，大部分回流至生物接触氧化池
格栅井——调节池——污水处理设备（包括气浮池—缺氧池—接触氧化池——二沉池）——排放。
Grid well - regulating tank - sewage treatment equipment (including air flotation tank - anoxic tank - contact oxidation tank - secondary sedimentation tank) - discharge.
2.1格栅井：钢格栅设置在调节池前格栅井内，以拦截生活污水较大颗粒的悬浮物，保证后续设备的正常运行。
2.1 grid well: the steel grid is set in the grid well in front of the regulating pool to intercept the suspended solids with large particles of domestic sewage and ensure the normal operation of subsequent equipment.
2.2调节池：由于污水水质水量变化较大，需设置调节池进行调节，以保证设备能够连续平稳的运行。
2.2 regulating tank: since the water quality and quantity of sewage vary greatly, it is necessary to set up a regulating tank for regulation to ensure the continuous and stable operation of the equipment.
2.3污水处理设备：
2.3 sewage treatment equipment:
2.4气浮池的主要作用是通过曝气机使污水中的大部分杂质上浮的液面通过刮渣机去除。为后续污水处理提供条件；
2.4 the main function of the air flotation tank is to remove the floating liquid level of most impurities in the sewage through the slag scraper through the aerator. Provide conditions for subsequent sewage treatment;
2.5接触氧化池是污水处理中的核心设备，污水进入氧化池后，与氧化池中的微生物进行接触，微生物发酵过程中的需氧量由鼓风机供给，池中的微生物将污水中的有机物氧化分解，为自身的繁殖和生长提供营养和能量，同时降低污水中的COD浓度；
2.5 contact oxidation tank is the core equipment in sewage treatment. After sewage enters the oxidation tank, it contacts with the microorganism in the oxidation tank. The oxygen demand in the microbial fermentation process is supplied by the blower. The microorganism in the tank oxidizes and decomposes the organics in the sewage, provides nutrition and energy for its reproduction and growth, and reduces the COD concentration in the sewage;
2.6二沉池：污水从接触氧化池出来后进入二沉池，二沉池的主要作用是出去污水中从接触氧化池夹带的少量污泥，污泥在二沉池沉淀后，大部分回流至生物接触氧化池；
2.6 secondary sedimentation tank: the sewage flows into the secondary sedimentation tank after it comes out of the contact oxidation tank. The main function of the secondary sedimentation tank is to remove a small amount of sludge from the contact oxidation tank. After sedimentation in the secondary sedimentation tank, most of the sludge flows back to the biological contact oxidation tank;
Grid well - regulating tank - sewage treatment equipment (including air flotation tank - anoxic tank - contact oxidation tank - secondary sedimentation tank) - discharge.
2.1格栅井：钢格栅设置在调节池前格栅井内，以拦截生活污水较大颗粒的悬浮物，保证后续设备的正常运行。
2.1 grid well: the steel grid is set in the grid well in front of the regulating pool to intercept the suspended solids with large particles of domestic sewage and ensure the normal operation of subsequent equipment.
2.2调节池：由于污水水质水量变化较大，需设置调节池进行调节，以保证设备能够连续平稳的运行。
2.2 regulating tank: since the water quality and quantity of sewage vary greatly, it is necessary to set up a regulating tank for regulation to ensure the continuous and stable operation of the equipment.
2.3污水处理设备：
2.3 sewage treatment equipment:
2.4气浮池的主要作用是通过曝气机使污水中的大部分杂质上浮的液面通过刮渣机去除。为后续污水处理提供条件；
2.4 the main function of the air flotation tank is to remove the floating liquid level of most impurities in the sewage through the slag scraper through the aerator. Provide conditions for subsequent sewage treatment;
2.5接触氧化池是污水处理中的核心设备，污水进入氧化池后，与氧化池中的微生物进行接触，微生物发酵过程中的需氧量由鼓风机供给，池中的微生物将污水中的有机物氧化分解，为自身的繁殖和生长提供营养和能量，同时降低污水中的COD浓度；
2.5 contact oxidation tank is the core equipment in sewage treatment. After sewage enters the oxidation tank, it contacts with the microorganism in the oxidation tank. The oxygen demand in the microbial fermentation process is supplied by the blower. The microorganism in the tank oxidizes and decomposes the organics in the sewage, provides nutrition and energy for its reproduction and growth, and reduces the COD concentration in the sewage;
2.6二沉池：污水从接触氧化池出来后进入二沉池，二沉池的主要作用是出去污水中从接触氧化池夹带的少量污泥，污泥在二沉池沉淀后，大部分回流至生物接触氧化池；
2.6 secondary sedimentation tank: the sewage flows into the secondary sedimentation tank after it comes out of the contact oxidation tank. The main function of the secondary sedimentation tank is to remove a small amount of sludge from the contact oxidation tank. After sedimentation in the secondary sedimentation tank, most of the sludge flows back to the biological contact oxidation tank;