DEFOAMER (Anti Foam)

Problem Background:

The most common meaning of foaming is foam raised-up and floating on the fluids surface. Even it is actually easy to monitor and relatively easy to handle but foaming may causes a lot of problems such false reading of liquid levels and cause incidentically overflow. This might reduces the process speed and availability of process equipment.

In industrial processes, foams may cause serious problems. They cause defects on surface coatings. It prevents the efficient filling of tank and containers. A variety of chemical formulae are available to prevent formation of foams.

General Description:

A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Commonly used agents are insoluble oils, polydimethylsiloxanes and other silicones, certain alcohols, stearates and glycols. The additive is used to prevent formation of foam or is added to break a foam already formed.

Chemical Properties:

Generally a defoamer is insoluble in the foaming medium and has surface active properties. An essential feature of a defoamer product is a low viscosity and a facility to spread rapidly on foamy surfaces. It has affinity to the air-liquid surface where it destabilizes the foam lamellas. This causes rupture of the air bubbles and breakdown of surface foam. Entrained air bubbles are agglomerated, and the larger bubbles rise to the surface of the bulk liquid more quickly

General Characteristics of Defoamer-10;

– Appearance: white milky
– Specific Gravity: 1.00
– Solid Content (%) : 20

Applications:

Detergents
Anti-foams are added in certain types of detergents to reduce foaming that might decrease the action of the detergent. For example, dishwasher detergents have to be low foaming for the dishwasher to work properly.

Foods
When used as an ingredient in food, antifoaming agents are intended to curb effusion or effervescence in preparation or serving.[citation needed] The agents are included in a variety of foods such as chicken nuggets in the form of polydimethylsiloxane (a type of silicone).[6][7]

Silicone oil is also added to cooking oil to prevent foaming in deep-frying.

Industrial use
Defoamers are used in many industrial processes and products: wood pulp, paper, paint, industrial wastewater treatment, food processing, oil drilling, machine tool industry, oils cutting tools, hydraulics, etc.

Wastewater Treatment

Defoamer-10 can be used to eliminate foaming which sometimes or even continually occurs generally in aeration pond of a wastewater treatment plant. 

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