Gate to Gate
Identity ID
ab2f663e-7aff-4a76-b0f6-da9a5cb9b6e3
Process class
Associated ID
5239a22e-02b9-470e-a0fe-645992415e2f
Included activities starts
Included activities ends
Description
The process first employs preliminary treatment through coarse and fine screens to effectively intercept and remove large suspended solids from wastewater, preventing these materials from damaging subsequent treatment equipment. The grit chamber specifically removes sand particles and other heavy granular substances, which, if not eliminated, would settle during later treatment stages and affect treatment efficiency. In the secondary biological treatment stage, the AAO (Anaerobic-Anoxic-Oxic) process plays a crucial role by precisely controlling dissolved oxygen levels in different zones to achieve organic matter degradation, nitrogen removal, and phosphorus elimination. The anaerobic phase promotes phosphorus release, the anoxic phase carries out denitrification, and the aerobic phase completes the oxidative decomposition of organic matter and phosphorus uptake. In the advanced treatment stage, Membrane Bioreactor (MBR) technology is employed to further improve water quality. MBR integrates biological treatment with membrane filtration, effectively removing suspended solids, bacteria, and viruses from water through the high-efficiency separation of microfiltration or ultrafiltration membranes, ensuring the effluent meets high-quality standards. The advantages of MBR technology lie in its excellent solid-liquid separation capability and its relatively small footprint. Sludge treatment includes the collection, storage, and dewatering of sludge. Proper sludge treatment not only reduces environmental pollution but also enables sustainable sludge management through resource recovery, such as fertilizer production or energy recovery. Finally, ultraviolet (UV) disinfection destroys the DNA of microorganisms in water by UV irradiation, rendering them unable to reproduce, thereby achieving disinfection. Treated effluent after UV disinfection can be safely discharged into rivers, minimizing environmental impact.
Activity Description
The wastewater treatment process includes: primary treatment for removing large suspended solids and sand from wastewater through coarse/fine screens and grit chambers; secondary biological treatment using the AAO process for organic matter degradation, nitrogen removal, and phosphorus removal; advanced treatment utilizing MBR (Membrane Bioreactor) to further improve water quality; sludge handling involving sludge collection, storage, and dewatering; and finally, ultraviolet (UV) disinfection to ensure the effluent meets discharge standards before releasing the treated wastewater into rivers.
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