Domestic sewage treatment

Domestic sewage treatment

1、 Methods for treating domestic sewage

Domestic sewage treatment mainly includes physical treatment, chemical treatment, and biological treatment methods.

Physical treatment method: mainly removes suspended solid pollutants in wastewater, including sedimentation, 

filtration, centrifugal separation, air flotation, evaporative crystallization, reverse osmosis, etc.

Chemical treatment method: Separation and removal of dissolved or colloidal pollutants in wastewater through 

chemical reactions and mass transfer, or conversion into harmless substances. The specific methods include coagulation, neutralization, oxidation-reduction, extraction, stripping, stripping, adsorption, ion exchange, electrodialysis, and reverse osmosis.

Biological treatment method: utilizing the metabolic process of microorganisms to convert organic pollutants in 

solution, colloid, and fine suspended state in wastewater into stable and harmless substances. 

According to the different microorganisms involved, biological treatment can be divided into two types: aerobic 

biological treatment and anaerobic biological treatment. Commonly used methods include activated sludge 

process, biofilm process, biological contact oxidation process, etc.

In practical applications, it is often necessary to adopt a combination of the above methods based on 

the specific composition and treatment requirements of wastewater to achieve the best treatment effect.

Two domestic sewage treatment equipment

There are various types of domestic sewage treatment equipment, and different equipment can be 

selected according to the treatment process and scale. For example, integrated domestic sewage 

treatment equipment integrates physical filtration, biodegradation, and plant interception processes, 

effectively removing organic matter, and can also remove pollutants such as N and P through the synergistic 

effect of aquatic plants and microorganisms. This type of equipment is suitable for domestic sewage treatment 

in residential areas, restaurants, hotels, schools, and similar industrial sewage treatment.

Three application scenarios for domestic sewage treatment

Domestic sewage treatment technology is widely used in various fields, including construction, agriculture, 

transportation, energy, petrochemicals, environmental protection, urban landscape, healthcare, catering, etc. 

Especially in urban sewage treatment, domestic sewage treatment is an indispensable part. Through centralized 

treatment, sewage can meet discharge or reuse standards, thereby protecting the environment and water resources.

In summary, domestic sewage treatment is a complex and important process that involves the application of various 

treatment methods and equipment. In practical operation, it is necessary to select appropriate treatment methods 

and equipment based on factors such as the specific composition of sewage, treatment requirements, and application 

scenarios, in order to achieve the best treatment effect.