As we all know, sewage treatment is very important in our daily work and life. We have to treat sewage strictly so that the sewage meets the discharge standard. But in the process of treatment sewage is easy to produce foam, which greatly affects the treatment process. So we have to add sewage treatment defoamer for defoaming. Antifoam agent has two categories: silicone and non-silicone, today we will talk about the difference between silicone defoamer and non-silicone defoamer.
Silicone Defoamer for Wastewater Treatment
Silicone defoamer is a defoamer made of silicone oil as the main ingredient, formulated with appropriate amount of solvent, emulsifier or inorganic filler. Because the chemical structure of silicone oil is silicone-oxygen (Si-O) bond is the main chain structure, bond energy is high, 121 kcal/g molecule, resulting in silicone defoamer of high thermal stability. Moreover, silicone defoamer is chemically stable at high and low temperatures, and can be used in a wide range of temperatures. Therefore, silicone defoamer is widely used in high temperature, strong acid and alkali and other harsh systems, such as sewage treatment in various industries, circulating water treatment.
Attention! Although the waste water treatment silicone defoamer is oil-in-water emulsion can be arbitrarily diluted. However, at the same time as dilution, the stability of the emulsion will be sharply reduced due to shock, and delamination occurs. So when diluting silicone defoamer should be slowly and evenly stirred, adding thickener to improve stability. The diluted emulsion is recommended to be used up within a short period of time.
Silicone-free Defoamer for Sewage Treatment
Silicone-free defoamer is also polyether defoamer and fatty alcohol defoamer, synthesized by special surface activator additives. They can reduce the surface tension of water, solutions, suspensions, etc., and cause the foam to burst. Foam caused by a large number of chemical additives in wastewater treatment can be eliminated.
These chemical additives form polymer compounds in water, which are easy to form bubbles. Because of their strong intermolecular adsorption, they increase the strength of the bubble film, making it difficult to eliminate bubbles. Non-silicone defoamer is able to eliminate these bubbles. And non-silicone defoamer has superior anti-foaming and foam inhibition performance, will not produce silicone spots, floating oil. Silicone-free defoamer can be used in chemical sewage treatment, all kinds of wastewater treatment and other water treatment industry, non-silicone defoamer can also be used for metal cleaning, circuit board cleaning and so on.
The Difference Between Silicone Defoamer and Silicone-free Defoamer
01. Price difference/
The production cost of silicone defoamer is relatively high, and the price will be high accordingly. The price of silicone-free defoamer may be more competitive, and it is suitable for some production occasions with higher cost requirements.
02. Difference in composition/
Silicone defoamer usually contain silicone oil, stabilizers and modified silicone polymers, such as polyether-modified silicone. silicone-free defoamer is mainly composed of compounds such as polyether and polyester, or use other surfactants as the main ingredients.
03. Performance differences/
Silicone defoamer has excellent defoaming effect and high temperature resistance, and can be stabilized in a wide range of temperatures and under acid and alkali conditions. Non-silicone defoamer relies on other ingredients (such as surfactants or surfactants) to realize defoaming effect, and its defoaming performance may be relatively weak.
04. Application areas/
Silicone defoamer is widely used in cleaners, detergents, cosmetics, industrial production and other fields. Silicone-free defoamers are widely used in fields that are sensitive to silicone components or have silicone restrictions, such as food processing, beverage and pharmaceutical industries.
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