1. Coarse Screen
Used to remove larger solid debris from wastewater, such as plastics, branches, and similar materials.
2. Lift Pump
Used to lift wastewater from a lower level to a higher level for subsequent treatment.
3. Fine Screen
Used to remove smaller solid debris from wastewater, such as fine particles, fibers, and similar materials.
4. Grit Chamber
Used to remove heavier inorganic particles from wastewater, such as sand and gravel, to prevent wear or clogging in downstream treatment equipment.
5. Primary Clarifier
Primary Sedimentation Tank, used in the initial stage of wastewater treatment to remove suspended solids and some organic matter through gravity settling.
6. Anaerobic Tank
Used to break down organic matter under anaerobic conditions through anaerobic microorganisms, typically for treating high-concentration organic wastewater or sludge digestion.
7. Anoxic Tank
Used to carry out denitrification under low-oxygen conditions, converting nitrate nitrogen into nitrogen gas, thereby removing nitrogen pollutants from wastewater.
8. Aerobic (Biofilm) Tank
Used under aerobic conditions to degrade organic matter through aerobic microorganisms and biofilm carriers, while promoting nitrification to remove organic matter and ammonia nitrogen from wastewater.
9. Mixed Liquor Recirculation
Refers to the recirculation of mixed liquor (containing activated sludge and wastewater) from the aerobic tank or reactor to the front-end treatment unit (such as the anoxic tank) to enhance biological treatment processes like denitrification.
10. Secondary Clarifier
Secondary Sedimentation Tank,used after the biological treatment process to separate activated sludge and biofilm through gravity settling, ensuring that the effluent meets water quality standards.
11. Return Sludge
Refers to the activated sludge returned from the secondary sedimentation tank to the biological treatment unit (such as the aerobic or anaerobic tank) to maintain microbial concentration and treatment efficiency in the system.
12. Disinfection
Refers to the use of chemical, physical, or biological methods to kill or remove pathogenic microorganisms from wastewater, ensuring that the effluent meets safety standards.
13. Primary Sludge
Refers to the sludge separated by gravity settling in the primary sedimentation tank, primarily containing suspended solids and some organic matter.
14. Excess Sludge
Waste Activated Sludge (WAS), refers to the excess activated sludge generated during the biological treatment process, which typically needs to be removed from the system for further treatment or disposal.
15. Sludge Thickening
Used to reduce sludge volume and increase solid content through gravity or mechanical methods, facilitating subsequent treatment or disposal.
16. Sludge Digestion
Typically divided into aerobic digestion and anaerobic digestion, it is used to break down organic matter in sludge through microorganisms, reducing sludge volume and producing byproducts such as biogas.
17. Sludge Dewatering
Used to remove water from sludge through mechanical or natural methods, further reducing sludge volume for easier transportation and disposal.
18. Sludge Drying
Through thermal or natural evaporation, it further reduces the moisture content in sludge, achieving a drier state for resource utilization or final disposal.
19. Sludge Disposal or Comprehensive Utilization
Refers to the safe disposal or resource utilization of treated sludge, such as landfilling, incineration, land application, or use as construction materials