Defoamer is a type of additive specifically developed for various water treatment systems. It is applied in multiple foaming systems such as pharmaceuticals, papermaking, leather, printing and dyeing, biological treatment processes of urban sewage, and chemical cleaning. Depending on the nature of the wastewater, different defoamers are used in water treatment. Generally, they can be classified into silicone-based, silicone-polyether-based, fatty acid-based, polyether-based, and high-carbon alcohol-based according to their components; and into solid defoamers, powder defoamers, and liquid defoamers (oily liquids and emulsion liquids) according to their forms.
The defoamer has a fast defoaming speed, a long foam inhibition time, high efficiency, and low dosage. It is easily dispersible in water and can be well compatible with liquid products. The active ingredients with high dispersibility of the treatment defoamer can quickly penetrate the liquid film of the polyvinyl alcohol foam, reduce the viscosity of the liquid film, and accelerate the drainage, achieving the effects of rapid foam breaking and foam generation inhibition. It does not affect the progress of water treatment, water quality index detection, and discharge. Moreover, it has strong versatility, low COD, low consumption, and low cost.
The defoamer is resistant to high electrolytes, strong acids, and strong alkalis, addressing the drawback that common defoamer emulsions are prone to demulsification and failure in high - electrolyte, strong - acid, strong - alkali, and high - shear systems. It not only suppresses excessive surface foam but also eliminates dispersed bubbles in the bulk phase, and is less likely to cause demulsification and oil floating.
The defoamer adopts an environmentally friendly formula. The product is non - toxic, harmless, does not affect bacterial reproduction, is non - corrosive, has biological inertness with no adverse side effects, and is easy to use. It can also be used for defoaming in the oil drilling fluid mud system.
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