What is a sewage treatment process? What are the main handling methods?

Author：

Huanke

What is a sewage treatment process?
Wastewater treatment process refers to a technical method that removes or converts harmful substances from wastewater into harmless substances through a series of physical, chemical, and biological processes. It aims to protect the environment, maintain ecological balance, and provide clean water resources for humanity. The sewage treatment process is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc.

What are the main methods of sewage treatment?
The main methods of sewage treatment include biological, physical, chemical, electrochemical, ultraviolet, and reverse osmosis methods.
1. Biological method: Utilizing the effectiveness of microbial growth, pollutants in organic wastewater are degraded into substances such as CO2 and water. Common biological treatment methods include activated sludge method, MBBR method, SBR method, etc.
2. Physical method: Using physical processes such as filtration, sedimentation, and air flotation to separate and remove pollutants from wastewater.
3. Chemical method: Through chemical reactions, pollutants are decomposed or converted into harmless substances, including chemical precipitation, redox methods, etc.
4. Electrochemical method: Using electrode reactions in electrochemical reactions and chemical reactions in electrolytes to remove harmful substances from wastewater.
5. Ultraviolet method: Using ultraviolet light to decompose organic matter into harmless substances, this method is suitable for small-scale wastewater treatment.
6. Reverse osmosis method: The wastewater is passed through a semi permeable membrane filter to separate water molecules from the wastewater, thereby removing harmful substances.
In addition, sewage treatment also includes steps such as sedimentation tank, screening (interception), air flotation (upward flotation), centrifugation and cyclone separation.
The actual treatment process needs to be designed and selected based on the specific conditions of the pollutant properties, water quantity, and water quality requirements of the wastewater.