For sewage treatment Activated carbon Of course, the reason is that other technologies alone cannot meet the emission standards, and the second reason is that the cost of activated carbon treatment is more cost-effective than other technologies.

The advantage of activated carbon technology is that it can treat water that is difficult to be biodegraded (such as toluene, phenol) and colored water. The disadvantage is that it is expensive. Of course, there is also sewage that is difficult to treat with activated carbon.

Generally speaking, the organic matter with lower solubility is easier to be adsorbed by activated carbon in the aqueous phase; On the contrary, the more easily dissolved or electrolyzed components are more difficult to be adsorbed by activated carbon.

It is common to use powdered activated carbon to treat sewage. The cost of powdered activated carbon is low. The disadvantage is that there is dust (of course, there is a mature solution for this) and sludge treatment is more troublesome. The granular activated carbon is of course convenient to use for sewage treatment, but the disadvantage is that granular carbon is more expensive.

How to select appropriate activated carbon?

As an old method, isothermal adsorption test can be used to determine the dosage of certain activated carbon. It can not only determine whether a certain activated carbon can be used, but also determine whether there is a higher adsorption capacity and its expected dosage.

Powdered activated carbon requires less preparatory work for isothermal adsorption, while granular carbon needs to be ground to a finer particle size in advance, generally 90% of which passes 325 meshes.

Of course, the price of 2-3 thousand tons of carbon, you don't have to work so hard, it's useless anyway.

For carbon with higher indicators, the unit price ranges from RMB 5000 to RMB 10000, and the service life will be longer. It is necessary to accurately calculate the sewage treatment cost per cubic meter and consider the hazardous waste disposal cost of waste carbon to form the total sewage treatment cost. Under this premise, it is very important to carry out scientific test and evaluation.

A simple and crude way to find cheap carbon can not find a solution with low overall cost.