english 1. Optimize aeration equipment
It is very important to choose a suitable aerator. For example, a microporous aerator can produce small and uniform bubbles, increase the contact area between bubbles and pollutants, and improve the flotation efficiency. At the same time, regularly check and maintain the aerator to prevent it from being blocked or damaged, and ensure uniform and stable aeration.
2. Adjust process parameters
Reasonable control of aeration volume and aeration time is the key. According to the water quality and treatment volume of the wastewater, the optimal aeration volume is determined through experiments and debugging, which can not only ensure sufficient bubble generation, but also avoid excessive aeration causing bubbles to merge and become larger. In addition, optimize the aeration time so that the bubbles have sufficient contact time with the pollutants to improve the flotation effect. For example, for wastewater containing fine suspended particles, appropriately extending the aeration time can allow bubbles to better adhere to the particles and achieve efficient separation.
3. Add appropriate reagents
Adding an appropriate amount of flotation agent can change the properties of the pollutant surface, making it easier to attach to bubbles. For example, for pollutants with strong hydrophilicity, adding a hydrophobic flotation agent can reduce the interfacial tension between pollutants and water and increase the binding force between bubbles and pollutants. At the same time, adding a coagulant can promote the coagulation of pollutants and form larger flocs, which is convenient for bubble attachment and floating. However, attention should be paid to the type and dosage of the agent to avoid secondary pollution or affect the flotation effect due to excessive agent.
4. Improve water quality conditions
Pre-treating wastewater to reduce the turbidity and hardness of wastewater can help improve the efficiency of bubble generation. For example, large particle impurities in wastewater can be removed by sedimentation, filtration and other methods to prevent them from clogging the aerator or affecting the attachment of bubbles and pollutants. In addition, the pH value of the wastewater is adjusted to a suitable range so that the surface charge properties of the pollutants are conducive to the attachment of bubbles. Different pollutants have different surface charges at different pH values. Determining the optimal pH value through experiments can significantly improve the flotation effect.
