The role of the aeration tank for wastewater treatment in Inner Mongolia wastewater treatment : the main role of this tank is to remove organic matter. COD is degraded by removal of organic matter. The COD degradation process uses the activated sludge process. Most of the organic matter in the aerobic pond is biochemically degraded by aerobic microorganisms. The process of biochemical degradation of microorganisms is the activated sludge process. Activated sludge is a flocculant composed of countless bacteria and other microorganisms, and its surface has a polysaccharide The viscous layer has a large surface area. It has strong adsorption and flocculation ability on suspended and colloidal organic particles in wastewater. In the presence of oxygen, it has strong oxidation ability on organic matter. The adsorption and oxidation of this activated sludge are used to remove organic pollutants from wastewater.
Its processing process is: aerobic microorganisms grow and multiply and aggregate together to form bacterial micelles; other microorganisms (protozoa, etc.) coexist on the bacterial micelles, and adsorb and interweave inanimate solid impurities to form activated sludge . Has good flocculation adsorption performance. The metabolism of microorganisms such as bacteria, the treatment of wastewater in Inner Mongolia, and the flocculation and adsorption of bacterial micelles make pollutants (organic matter, etc.) in the sewage removed.
The role of the aeration tank: the aeration tank and the sedimentation tank generally form a combined process. The primary sedimentation tank located in front of the aeration tank and the secondary sedimentation tank installed behind the aeration tank are respectively used for pre-treatment and post-treatment of wastewater. The aeration tank is also built in conjunction with the secondary sedimentation tank. This facility consists of aeration zone, diversion zone, Inner Mongolia wastewater treatment and sedimentation zone, and return zone.
The function of the diversion area is to condense the sludge and separate the gas and water, creating conditions for precipitation. In the aeration zone, the waste water and the returned sludge are fully mixed, then flow into the sedimentation zone through the diversion zone, and the clarified water is discharged through the overflow weir. The sediment sludge flows back into the aeration tank along the bottom of the aeration zone. This facility has a compact structure and short process, which can save sludge return equipment.
Reason for use: Aeration is a means to make the air and water come into strong contact. The purpose is to dissolve the oxygen in the air in the water, or exile unwanted gases and volatile substances into the air. In other words, it is a means to promote the exchange of matter between gas and liquid. It also has other important functions, such as mixing and stirring. Oxygen in the air is transferred to the water by aeration, and oxygen transfers from the gas phase to the liquid phase. This theory of mass transfer and diffusion is more commonly applied by the double membrane theory proposed by Lewis and Whitman.
Blast aeration: Also known as compressed air aeration, it is mainly composed of aeration fan and special aerator. The aeration tanks adopting this method are mostly rectangular concrete tanks. The partition wall in the tank is divided into several separate water-incoming compartments, and each compartment is divided into several corridors. After entering the pond, the sewage flows in the corridor in sequence and is discharged to the other end.
The air is delivered to the air diffusion device at the bottom of the pond through an air compressor through a pipeline. Inner Mongolia sewage is treated as bubbles dispersed and escaped, and oxygen is dissolved into the water at the gas-liquid interface. There are four different types of diffusion devices: porous tubes, fixed spiral aerators, water ejectors, and microporous diffusion plates. Blast aeration is an important part that affects the effluent quality of sewage treatment plants and reduces energy consumption. Inner Mongolia wastewater treatment is difficult to determine the demand for dissolved oxygen (DO) due to the nonlinearity, hysteresis, and time variability of the wastewater treatment process. Conventional constant aeration control has large fluctuations in dissolved oxygen concentration, large aeration costs, Problems such as inaccurate aeration.