1. Promote hydraulic circulation
The use of submersible mixers for hydraulic circulation is an efficient, environmentally friendly, and energy-saving method, especially widely used in anaerobic tanks, sludge concentration tanks, and activated sludge processes for wastewater biochemical treatment. Because in this class pool, only the necessary loops must be presented; The water flow rate can maintain the floating state of the solution in the pool, allowing sufficient contact between the cultivation substrates of the two biological strains. Therefore, the pool shape often adopts an air oxidation ditch shape, which generates a continuous circulating water flow based on the kinetic energy input by the submersible mixer. This type of design scheme not only can reasonably maintain the solution floating, but also because the total flow rate of the circulating water in the pool is generally tens or even thousands of times higher than the inlet flow rate, it creates a great ability to homogenize the diluent in the pool, thus promoting the processing technology to have the characteristic of anti impact load. In the design scheme of activated sludge process, the surface aeration machine equipment has a dual function of oxygenation and hydraulic circulation. In engineering projects, it is often necessary to adjust the oxygenation capacity due to changes in water body and flow rate, which makes it difficult to balance the circulating water flow in the pool, resulting in the problem of sedimentation and mud accumulation in the ditch. However, adding a submersible mixer can effectively deal with this problem, and carrying out this technological transformation project is not complicated, with very little project investment.
2. Improve oxygen transfer efficiency
In the wastewater biochemical solution system software, the hydrolysis acidification tank is the basic way to maintain the normal metabolism of aerobic bacterial species. The oxygen transfer efficiency of the water hydrolysis acidification tank system software is high and immediately related to the water level. In the hydrolysis acidification tank, a submersible mixer is used to design the hydrolysis acidification tank into the continuous circulation flow tank type, which will change the way bubbles are released from the aeration head under the effect of circulating water flow rate, expand the oxygen transfer water level, and improve the high efficiency of oxygen transfer. The adoption of such design schemes can generally increase the oxygen transfer efficiency of the hydrolysis acidification tank system software by about 15%, and save energy and operating costs in wastewater treatment.
3. Promote mixing and stirring
With the development trend of biochemical solutions for wastewater, processing techniques such as separation and segmented solutions have emerged. When the capacity of a single compartment is small, a square or circular plan of the fried rice cake can be designed for each compartment, and a mixing device can be installed in each compartment. The layout method of this type of tubular reactor is very flexible, and the positions can be arranged freely in the annular pool, as long as the resulting torque is consistent with the direction of the water flow. In a rectangular pool, it should be arranged at the intersection of the side walls, and attention should be paid to the selection of water flow direction in the design scheme. When the capacity of a single pool is large, it is necessary to analyze and compare the technical specifications to select whether to use mixing or pushing type machinery and equipment. Generally speaking, the larger the capacity and water surface of a single pool, the more economical it is to use push type machinery and equipment.