Gate to Gate
Identity ID
7ced139a-6af3-48ae-94d4-d43322fc7ff0
Process class
Associated ID
1a99f24d-b4f9-4766-b900-5405bd4640bb
Included activities starts
Included activities ends
Description
The process begins with pre-treatment, using physical methods to remove suspended and floating solids from wastewater to reduce the load on subsequent treatment stages. Coarse screens act as primary filtration, intercepting large debris, while fine screens further filter smaller particles, ensuring the proper operation of downstream treatment units. The vortex grit chamber utilizes centrifugal force to efficiently remove heavy granular materials such as sand, reducing sludge production and enhancing treatment efficiency. The secondary treatment stage is the core of wastewater treatment. The modified oxidation ditch (MBBR-A/A/O) technology combines the advantages of conventional activated sludge processes and biofilm processes, achieving efficient organic matter degradation and nitrogen and phosphorus removal through alternating aerobic, anoxic, and anaerobic conditions. The addition of MBBR media provides greater surface area for microbial attachment, enhancing the system's resilience to shock loading, improving treatment efficiency, and upgrading effluent quality. In the advanced treatment stage, an intermediate pumping station, dissolved air flotation tank, and chemical dosing unit work together to further remove suspended solids and certain dissolved pollutants from the wastewater. The dissolved air flotation process injects air into water to form fine bubbles that attach to suspended particles, causing them to float to the surface, thereby achieving solid-liquid separation. The chemical dosing room enhances pollutant coagulation and settling by adding coagulants and flocculants, further improving effluent water quality. The disinfection process serves as the final barrier in wastewater treatment; the ultraviolet (UV) disinfection tank utilizes the germicidal effect of UV light to effectively inactivate bacteria, viruses, and other pathogens in the water, reducing pollution risks to the receiving water body.
Activity Description
The wastewater treatment process includes: preliminary treatment to remove large solid waste through coarse and fine screens, followed by further grit sedimentation in a vortex grit chamber; secondary treatment using a modified oxidation ditch (MBBR-A/A/O) for biological degradation, enhancing the biodegradability of the wastewater; advanced treatment to further remove suspended solids via an intermediate lift pumping station, dissolved air flotation tank, and chemical dosing unit; finally, UV disinfection ensures the treated water meets discharge standards before being released into the river.
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