Gate to Gate
Identity ID
7a72b370-8c0b-4c7b-9857-617618895c41
Process class
Associated ID
6a0d357f-6738-48da-bd17-477f16fc8803
Included activities starts
Included activities ends
Description
The process first employs a coarse screen to intercept and remove larger floating and suspended solids in the wastewater, protecting subsequent treatment equipment from damage. Subsequently, a fine screen further filters out smaller suspended and floating particles, ensuring smooth operation of downstream treatment processes. The grit chamber removes inorganic particles such as sand through gravitational settling. The CAST (Cyclic Activated Sludge Treatment) bioreactor is the core of the entire treatment process, where microorganisms in the activated sludge degrade organic matter and nutrients such as nitrogen and phosphorus in the wastewater. Through periodic mixing and settling cycles, the CAST reactor effectively removes pollutants. Following this is the high-density clarifier, which accelerates the sedimentation rate by increasing sludge concentration, thereby more effectively removing suspended solids and improving the clarity of the effluent. The denitrification filter operates under anoxic conditions, converting nitrate nitrogen into nitrogen gas through microbial action, thus achieving nitrogen removal from wastewater, which is crucial for preventing eutrophication of water bodies. The fiber disk filter serves as a physical filtration step, capturing fine suspended particles in the water through fibrous filter cloth on the rotating disks, further enhancing water quality. Finally, the UV-sodium hypochlorite combined disinfection process serves as the final barrier before effluent discharge, integrating the bhighway-spectrum germicidal capability of ultraviolet light with the persistent disinfection effect of sodium hypochlorite to ensure complete inactivation of pathogenic microorganisms in the water and guarantee the safety of effluent quality.
Activity Description
The wastewater treatment process includes: firstly, intercepting large particles using a coarse screen, followed by a fine screen to further remove smaller suspended solids; then, an aerated grit chamber is used to remove inorganic particles; the CAST biological reactor treats organic matter and nutrients through microbial degradation; a high-density clarifier removes suspended solids by sedimentation; a denitrifying filter eliminates nitrate nitrogen under anoxic conditions; a rotating disk filter performs physical filtration to remove fine particles; finally, a combined disinfection process using ultraviolet light and sodium hypochlorite inactivates pathogenic microorganisms, ensuring the effluent meets the Class 1A discharge standard.
Process Description
Wastewater treatment services typically include four main aspects: pretreatment, primary treatment, secondary treatment, and tertiary treatment, ensuring the stable operation of the wastewater treatment system and compliance of the effluent water quality with regulatory standards.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This activity represents wastewater treatment with specific technologies in a WWT plant