Sewage is prone to a large amount of foam during the treatment process. If the foam in the sewage tank is not treated in time, it is easy to overflow and pollute the environment, affect the water treatment process, and deteriorate the water quality. This article specializes in analyzing the causes and hazards of effluent pool foaming, and provides a targeted foam elimination program for effluent pools-sewage treatment defoamers.
Causes of foaming in the cesspool
1. The initial bubble
In the initial stage of the aeration tank, the sludge is relatively small, the sludge load is high, and foam is prone to occur.
2. Denitrification foam:
The Nocardia group in the bio-foam is strictly aerobic microorganisms, and cannot use the substrate to grow under anoxic or anaerobic conditions. When the dissolved oxygen is insufficient and the system is operating at low load, denitrification foam is likely to be produced.
3. Surfactant foam
Sewage components contain surfactant components, and surface-active substances appear to contain polar-non-polar groups, so-called amphiphilic molecules, in their molecular structure. Under aeration conditions, one end of the non-polar group extends into the bubble, and the polar group is selectively adsorbed by the hydrophilic substance, so that the surface of the hydrophilic substance is converted into a hydrophobic substance and adheres to the bubble water. On the membrane, it floats to the surface of the water along with the bubbles. Surfactant substances can easily lead to a large number of them.
(Picture: Sinkhole foam)
Hazards of Sinkhole Foam
1. Foam affects the normal operation of the sewage treatment system;
2. The foam has a certain viscosity, so it will greatly reduce the oxygenation efficiency of the aeration tank;
3. Foam accumulation is prone to corruption, and it is easy to freeze in the cold winter, which affects the normal operation of the system;
4. The activated sludge system is sealed with pure oxygen. If a large amount of foam enters the oxygen compressor, it may cause fire and other hazards;
5. In the initial debugging process, the sludge after inoculation will be taken away by a large amount of foam, which not only increases the debugging time and investment cost, but also increases the difficulty of debugging.
Sewage tank defoaming solution
When encountering the problem of sewage treatment foam, it must be treated in time, otherwise harmful foam will easily increase the difficulty of water treatment and affect the operation of the system. The foam can be quickly eliminated by taking relevant measures in time and cooperating with defoamers.
The Nanhui defoamer manufacturer has developed a targeted defoamer for sewage treatment based on the characteristics of easy foaming in sewage treatment. It is made of polyether esterified products through a special process and is specially developed for various biological sewage treatment systems. The compound defoamer. It has the characteristics of fast defoaming speed, long foam suppression time, high efficiency and low dosage.
(Picture: Sump defoamer)
Nanhui sewage treatment defoamer added to the foam system can quickly spread, disperse, and quickly eliminate foam. After the defoamer contacts the foam, it expands further and penetrates into layers to replace the original foam membrane wall. Liquids with low surface tension always flow to liquids with high surface tension. The low surface tension of the defoamer itself makes the film wall gradually thinner, which leads to the rupture of bubbles.
Product advantages of Nanhui sewage treatment defoamer
1. Provide free samples, professional and technical personnel recommend according to your use environment, arrange sending samples for testing;
2. Factory direct sales, strong research and development capabilities, and customized samples. According to your sample foaming situation and your requirements for defoaming agents, defoaming formulas can be developed with strong defoaming pertinence;
3. The product has good stability, acid and alkali resistance, high temperature resistance, and can be used for defoaming in various water quality. It can continue to defoam and suppress foam under various harsh additions;
4. It is chemically or biologically inert, will not react with the components in the sewage, will not affect the water treatment operation, will not affect the microbial filter membrane, and will not affect the COD/BOD.
