Sludge conditioner is like a "dewatering assistant" for sludge, making it easier to squeeze out the water in the sludge. In plain terms, its working principle mainly consists of four tricks:

The first trick: Let the sludge particles "hold hands"

The particles in the sludge were originally charged and repelled each other, like a group of unruly children. Some components in the sludge conditioner act like "peacemakers", neutralizing these charges and preventing the particles from pushing each other but instead holding hands and gathering into large clumps. In this way, the water in the sludge can be more easily squeezed out, and the dewatering efficiency will naturally be high.

The second trick: Weaving a net for the sludge

Some sludge conditioners (such as high-molecular polymers) are like spider webs, firmly adhering sludge particles together. These "nets" not only stick small particles into large ones, but also lock moisture outside the nets, making it easier for dehydration equipment to draw the water away. With this sludge conditioner, the sludge will become more "solid" and have a lower water content after dewatering.

The third trick: Remove the "glue" from the sludge

There is a gel-like substance called EPS in the sludge, which sticks the water together like glue. The enzymes or biological components in the sludge conditioner can break down these glues and release the moisture. This is like using detergent to wash off the grease on the bowl. Once the water is released, dehydration becomes much easier.

The fourth trick: Adjust the "pH value" of the sludge

Sludge that is too acidic or too alkaline will affect dewatering. The conditioner can adjust the pH of the sludge to the most suitable position just like a beverage. For instance, adding lime to make sludge alkaline not only helps particles aggregate but also enables the dewatering equipment to operate more smoothly.

How much is needed? How to use it?

Don't be too greedy: It's not the case that the more sludge conditioner you add, the better. Adding too much may actually make the sludge "thinner". The optimal dosage is generally found through small experiments.

There are certain rules to follow when stirring: First, stir quickly to disperse the sludge conditioner, and then stir slowly to make the particles clump together. Just like kneading dough, stir it evenly first and then knead it into a ball.

The pH should be appropriate: Add alkali to acidic sludge and acid to alkaline sludge. Adjusting to a neutral pH is most conducive to dewatering.

What is the actual effect?

For instance, after a certain sewage treatment plant used a conditioner:

The moisture content of the sludge has decreased from 98.5% to 68% (originally like thin porridge, now like dough).

The dehydration time has been shortened by 60% (it used to take 2 hours, but now it can be completed in 48 minutes).

The filter cake is drier, making transportation and handling more convenient.

In conclusion, sludge conditioner is like a "catalyst" for sludge dewatering. When used in the right way, it can help sewage treatment plants save costs, improve efficiency and be more environmentally friendly.