Physical treatment is a treatment method that removes solid matter in sewage through filtration, sedimentation, and flotation. For stone factories, physical treatment can use the traditional coagulation and sedimentation method, which mixes sewage into a coagulant containing chemical substances, and removes suspended solids, sediments, and emulsions in the sewage through sedimentation and filtration. In addition, modern technologies such as air flotation and reverse osmosis can also be used to improve treatment efficiency.

 

 

Chemical treatment is a method of treating sewage using chemical methods. Stone factories can use chemical methods such as oxidation, reduction, and precipitation to treat organic and inorganic substances in sewage. For example, oxidants are used to oxidize organic matter in sewage into inorganic matter, or reducing agents are used to reduce heavy metal ions into metal precipitates, effectively reducing the emission of harmful substances.

 

 

Biological treatment is a method that uses microorganisms to break down organic matter in sewage. Stone factories can use biological processors such as biological contact oxidation tanks and biofilm reactors to treat sewage. In this process, microorganisms are used to break down organic matter into harmless substances such as carbon dioxide and water. At the same time, it can effectively reduce ammonia nitrogen, COD and other indicators.

 

 

In addition to the above three treatment methods, there are other treatment methods, such as ultraviolet sterilization, ozone oxidation, electrolytic oxidation, etc., but these methods are suitable for specific occasions and need to be selected according to the specific situation.