What are the methods for deep dehydration of sludge without adding auxiliary chemicals?

Deep sludge dehydration is to further discharge the water in the sludge to reduce the volume and weight. It is usually necessary to add auxiliary agents to help dehydration. However, if you do not add auxiliary chemicals for deep dehydration, there are also the following methods:

Mechanical pressing: Put the sludge into a mechanical dehydrator and press the sludge through high pressure to drain out the water. , to achieve the effect of dehydration.

Natural drying: dry the sludge in the sun, and the water will gradually evaporate to achieve dehydration.

Hot air dehydration: Use high-temperature hot air to dry the sludge. The hot air can accelerate the evaporation of water and achieve the dehydration effect.

It should be noted that the dehydration effect of these methods may not be as good as that of adding auxiliary agents, and may require longer time and larger space. At the same time, it will have a certain impact on the environment. Therefore, in actual operations, need to be considered comprehensively.

In addition to the above methods, there are also the following common deep dewatering methods of sludge:

Hot air drying method: use hot air to evaporate the water in the sludge, and then dry the sludge. The sludge is made into granules or blocks for easy subsequent processing or recycling. This method consumes a lot of energy and also causes certain pollution.

Filter press method: Squeeze the sludge through a filter press to lose water and obtain a solid sludge cake. This method is simple to operate and highly efficient, but it requires a large amount of equipment. The filter cloth also needs to be replaced.

Centrifugal dehydration method: Use centrifugal force to separate the water in the sludge to obtain a relatively dry sludge cake. This method has higher requirements for equipment and also requires frequent maintenance and cleaning.

The specific use of the above methods needs to be selected based on the nature of the sludge, moisture content, treatment requirements and actual conditions. The traditional deep sludge dehydration method has problems such as high energy consumption, low dehydration efficiency, and large equipment footprint. Therefore, in recent years, more and more new sludge dehydration technologies have been introduced, such as microwave-assisted dehydration and chemical conditioning. Agent dehydration, high pressure dehydration, etc. The introduction of these new technologies aims to solve the problems existing in traditional sludge deep dehydration methods, improve sludge dehydration efficiency, and reduce energy consumption and floor space.

If Shuitianlan Environmental Protection’s answer is helpful to you, I hope you can adopt it! Thanks for the support!