What should you pay attention to when choosing a sewage defoaming agent?
In the field of water-based coatings, so-called defoaming agents are generally used, and the silicone sewage defoaming agent is a very good material. So what should you pay attention to when choosing a sewage defoaming agent?
1. Pay attention to the insolubility and insolubility in the foaming liquid
In order to eliminate foam, during sewage treatment, the defoaming agent must be concentrated and concentrated on the bubble film. Only when it is insoluble or difficult to dissolve can it reach a supersaturated state. Furthermore, for defoaming agents used in sewage treatment in water systems, the active molecules must be strongly hydrophobic and weakly hydrophilic. Most of the HLB values are in the range of 1.5-3, which has the best effect.
2. Pay attention to its surface tension
When used in sewage treatment, the force between the defoaming agent molecules must be small and the surface tension must be lower than the foaming liquid. Only in this way can the defoaming agent particles immerse and expand on the bubble film, thereby eliminating pollution. Effect.
