Explanation on the role of aeration in biological contact oxidation tank and the selection of Roots blower
The biological contact oxidation tank is a sewage treatment process, and its aeration effect and the selection of Roots blower are crucial for the treatment effect. The following is a detailed explanation of these two aspects:
1、 The role of aeration in biological contact oxidation tank
1. Oxygenation:
The biological contact oxidation method mainly utilizes aerobic properties to achieve biological purification. The oxidation and synthesis of microorganisms require oxygen for endogenous respiration, so in addition to nutrients, oxygen is an important condition for ensuring the normal growth of microorganisms. Aeration can inject sufficient oxygen into the biological contact oxidation tank to meet the oxygen requirements of aerobic respiration, thereby completing the biochemical purification of sewage.
2. Mixing and Mixing:
Aeration provides oxygen and can also fully stir the water flow in the pool, creating turbulence. This turbulent state helps to improve the contact efficiency between sewage and biofilm, allowing substances to be more fully oxidized and decomposed by microorganisms.
3. Blocking and promoting updates:
The agitation effect of aeration can also cause blockage of the packing material, promoting timely renewal of the biofilm. The aging biofilm will peel off in a timely manner under the scouring effect formed by aeration, thereby maintaining good permeability of the filler and promoting the growth of the biofilm.
2、 Selection of Roots blower
1. Processing capacity:
The selection of Roots blower should first consider the processing capacity of the biological contact oxidation tank. Determine the required fan model and quantity based on the hourly processing capacity. The larger the processing capacity, the greater the required fan airflow.
2. Pressure:
The pressure of the Roots blower should meet the pressure drop requirements of the biological contact oxidation tank system. When choosing, it is necessary to understand the pressure drop of the system and select a fan that can provide sufficient pressure.
3. Efficiency and energy consumption:
Choosing low-energy Roots blowers can reduce operating costs. When choosing, you can compare the efficiency curves and energy consumption data of different models of fans to select products with better performance.
4. Material and Corrosion Resistance:
Due to the possible presence of corrosive substances in wastewater, the material of Roots blower should have good corrosion resistance. Common corrosion-resistant materials include stainless steel, alloy steel, etc. When choosing, it is necessary to determine the appropriate material based on the composition and concentration of the wastewater.
5. Maintenance and upkeep:
The Roots blower requires regular maintenance and upkeep during use, including changing lubricating oil and cleaning the interior of the blower. When choosing, you can consider whether the maintenance of the fan is convenient and whether there is an after-sales service team to provide technical support.
In summary, the aeration effect of biological contact oxidation tanks is crucial for the effectiveness of wastewater treatment, and the selection of Roots blowers directly affects the aeration effect and system operating costs. Therefore, when choosing a Roots blower, it is necessary to comprehensively consider multiple factors such as processing capacity, pressure, efficiency, material, and maintenance.
