defoamer-antifoam

How to distinguish the foam from sewage treatment aeration tank, and How to remove foam accordingly? Nowadays the sewage treatment technology of activated sludge method is deeply loved by urban sewage treatment plants, and the aeration tank is a key part of the sewage treatment of activated sludge method, but there is a common problem in the aeration tank - surface Covered by a lot of foam. The foam inside is generally divided into chemical foams and biological foams, which can cause oxygen to fail to be delivered in time, greatly reducing the oxygenation capacity. Not only will it cause adverse effects on microorganisms, but if it is serious, it will lead to poor quality of water and even cause the system to collapse. Adding appropriate amount of defoamer into the aeration tank in the treatment processing . The defoamer has alkali and acid resistance, fast defoaming, long-lasting foaming, high efficiency, and non-toxicity. No corrosion, no impact on the microbial growth of the a...

How to evaluate defoaming efficiency and compatibility of defoamer in paint？ Defoaming efficiency test Foam height method When defoaming agents are added, the defoaming rate of defoamers is a concern of many engineers. When testing the defoaming efficiency, we took the foam height method. Method: Take a certain amount of the defoamer-containing paint into the measuring cup with the marking line, use the micro air compressor to introduce the air into the coating system, observe the height of the coating inside the cup, the higher the liquid level, the more the defoaming effect difference. It can be used for rapid screening of initial defoamers, and needs to be combined with other test methods such as specific gravity method and roll coating method. Defoaming efficiency test Specific gravity method The high-speed agitated paint is poured into a density cup, the density of the paint is measured, and then the paint is sealed and stored, and the density is measured ...

Why biofoam is formed, how to control biofoam？ THE HARM OF THE BIOLOGICAL FOAM There are many effects of biofouling on the operation of wastewater plants: The bio-foam is generally viscous. It will enclose a large amount of solid material such as activated sludge into the floating foam layer of the aeration tank. The foam layer will tumbling on the surface of the aeration tank, hindering the entry of oxygen into the aeration tank mixture and reducing Oxygenation efficiency, especially for mechanical exposure. When the aeration tank mixed with foam enters the secondary settling tank, solid materials such as foam-wrapped activated sludge will increase the suspended solids content of the water and cause the effluent water quality to deteriorate, and a large amount of scum will be formed on the surface of the secondary settling tank. When the temperature in winter is low, the normal operation of the suction (scraping) mud bridge (machine) will be affected by the icing. The bio-...

How to choose defoamer for textile  auxiliary ? Introduction   Large amount of foam is produced during the wet processing of textile dyeing and finishing because of the using textile auxiliaries, which affect the production operation, the production capacity go down, product quality would be degraded.   Therefore, it must remove the harm ful foam from the textile processing. By the way, it has been proved that adding defoamer is the best efficient way to eliminate foam in the textile processing. The following are some of our experiences in the development and customer service and how to use defoamers for textile printing and dyeing? Development of  defoamer for  textile Ø   The demand of defoamer for textile (1)   As end user of textile factory, usually evaluate the product quality by trial on the machine. So defoamer must meet: --Viscosity should not be too high, and defoamer is easy to use, easy to control the addition amou...