Selection of aerators and Roots blowers for pig wastewater treatment
When selecting aerators and Roots blowers for pig wastewater treatment, multiple factors need to be considered to ensure that they meet the treatment requirements and have high operational efficiency. The following is a detailed analysis of the selection of aerators and Roots blowers:
1、 Selection of aerator
1. Applicable scenarios: Aeration tanks in pig wastewater treatment generally use impermeable membrane bottoms to reduce construction costs. In this case, it is necessary to choose an aerator suitable for this type of aeration tank. The hanging chain aerator is suitable for aeration tanks with impermeable membrane bottom due to its technical characteristics.
2. Save investment: The core structure of the suspended chain aerator can adopt a joint soil pool structure, or utilize existing ponds and natural water systems. The pool shape can be designed into an irregular shape according to the actual situation. This can significantly reduce civil engineering costs and save approximately 30-50% on project investment.
3. Operating efficiency: The suspended chain aerator system has significant characteristics of energy saving and low consumption. It releases small bubbles and stays in water for a long time. During the aeration process, the aeration unit swings freely underwater, resulting in high oxygen utilization and power efficiency.
4. Easy maintenance: All fasteners of the suspended chain mobile aerator system are on the water surface, making it easy to repair. Without stopping the gas and emptying the structure, the aerator can be directly lifted out of the water surface for maintenance and repair.
2、 Selection of Roots blower
1. Oxygen demand: First, calculate the amount of oxygen required to be introduced into the aerobic tank. This is usually calculated based on factors such as the size of the aerobic tank, sewage concentration, and aeration intensity. The flow rate of the Roots blower should meet the aeration requirements of the aerobic tank and consider a margin (usually 1.1-1.25 times the required flow rate of the system) to cope with fluctuations and air leakage losses during actual operation.
2. Boosting: The boosting of the Roots blower should be matched with the pressure drop of the aerobic tank system, with a margin (usually 1.05-1.15 times the system pressure drop) to ensure stable aeration effect.
3. Impeller material: Due to the high concentration of wastewater operating in the aerobic tank, the impeller of the Roots blower needs to be made of corrosion-resistant materials to cope with the erosion of chemicals and microorganisms in the wastewater.
4. Sealing performance: For applications that transport corrosive gases or require high sealing performance, appropriate sealing types should be selected, such as mechanical seals, packing seals, etc., to ensure that gas does not leak and protect internal components of the equipment.
5. Energy efficiency ratio: The selected Roots blower should save energy and reduce operating costs. When selecting, attention should be paid to parameters such as the energy efficiency ratio and power consumption of the fan.
6. Economy: On the premise of meeting performance requirements, factors such as the price, maintenance cost, and service life of the fan should be comprehensively considered to choose a higher product.
7. Customization requirements: If the aeration needs of the aerobic tank are special or complex, a customized Roots blower solution can be considered. This usually requires detailed communication and design based on the actual situation.
In summary, when selecting aerators and Roots blowers for pig wastewater treatment, multiple factors need to be considered comprehensively. Through reasonable selection, the performance stability, reliable operation, and meeting processing requirements of the equipment can be ensured.
