Application of Decanter Centrifuge in Sewage Treatment

decanter separstor has been widely used in municipal sewage treatment and sludge dewatering with its excellent separation effect, small footprint, and high efficiency, which is closely related to the vigorous development of environmental protection in recent years and the continuous improvement of sewage treatment capacity in cities.

Principles of decanter separator wastewater treatment process selection

The main technical and economic indicators for selecting the decanter separstor process include the investment per unit of water treated, investment reduction per unit of pollution, power consumption and cost per unit of water treated, power consumption and cost reduction per unit of pollutant, footprint, reliable operation performance, management and maintenance difficulty, and overall environmental benefits. Sewage treatment methods mainly include physical treatment, chemical treatment, physical and chemical treatment, and biological treatment. The centrifuge is a physical treatment method that separates and recovers unsolved and suspended pollutants in sewage through physical action without changing their chemical properties.

The commonly used filtration methods include the use of filter media to intercept suspended solids in sewage. The filter media includes screens, meshes, and particles. Commonly used filtration equipment includes grilles, screens, microfiltration machines, centrifuges, etc. Decanter separstor is generally used more to handle sewage. It uses the density difference between solid and liquid two phases to speed up the settling rate of solid particles under the action of centrifugal force to achieve solid-liquid separation, thus treating sewage by separating solids from the liquid, and then accelerating the processing speed of sewage.

The biological treatment part uses contact aerobic treatment process, which is a mature treatment plan with high removal rate of organic pollutants, and can effectively remove BOD5 and ammonia nitrogen. The biological contact oxidation tank has a large surface area of the biological film, which can absorb a large amount of organic matter in wastewater and has strong oxidation ability. At the same time of organic matter decomposition, the body of microorganisms on the biological film is constantly growing and breeding, that is, increasing the number of biological films. When the microorganisms on the biological film age and die, the biological film will fall off the filter media surface and then flow out of the tank with the wastewater.

Many advantages of decanter separator 

There are many advantages of the decanter separstor, which can perform uninterrupted separation work, with a large processing capacity, low liquid content of the processed products (generally less than 5%), small footprint, automatic operation, greatly reducing the use of time and labor. Therefore, no matter which centrifuge is used, it is necessary to select the appropriate machine for their products.

The decanter separstor has high efficiency for materials that it can adapt to. However, it is not suitable for situations where it cannot be used. If there is a mechanical failure, it is recommended to ask the decanter separstor manufacturer to solve it according to the situation. If you are not familiar with this type of centrifuge, it may be difficult to repair it by yourself. Common failures include differential failures, blade wear, and oil circuit problems. It is suggested to have a professional solve these issues.

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