Table 1 Classification of treatment processes of WWTPs in China .
From: Greenhouse gas emissions from municipal wastewater treatment facilities in China from 2006 to 2019
No. | Treatment processes | No. | Treatment processes |
|---|---|---|---|
1 | Physical Method | 5.1 | Anoxic/Oxic (AO) |
1.1 | Physical Treatment | 5.2 | Anaerobic/Anoxic/Oxic (A2O) |
1.2 | Filtration and Separation | 5.3 | Oxidation Ditch (OD) |
1.3 | Membrane Separation | 5.4 | Sequencing Batch Reactor (SBR) |
1.4 | Centrifugal Separation | 6 | Biofilm |
1.5 | Settlement | 6.1 | Biofilm |
1.6 | Flotation Separation | 6.2 | Biofilter |
1.7 | Evaporation Crystallization | 6.3 | Rotating Biological Contactor |
1.8 | Other Physical Treatment | 6.4 | Biological Contact Oxidation |
2 | Chemical Method | 7 | Anaerobic Biological Method |
2.1 | Chemical Treatment | 7.1 | Anaerobic Biological Treatment |
2.2 | Neutralization | 7.2 | Anaerobic Hydrolysis |
2.3 | Chemical Precipitation | 7.3 | Typical Anaerobic Reactors |
2.4 | Oxidation Reduction | 7.4 | Anaerobic Biofilter |
2.5 | Electrolysis | 7.5 | Other Anaerobic Biological Treatment |
2.6 | Other Chemical Treatment | 8 | Stabilization Pond, Constructed Wetland and Land Treatment |
3 | Physicochemical Method | 8.1 | Stabilization Pond, Constructed Wetland and Land Treatment |
3.1 | Physicochemical Treatment | 8.2 | Stabilization Lagoon |
3.2 | Chemical Coagulation | 8.3 | Oxidation Lagoon |
3.3 | Adsorption | 8.4 | Anaerobic Lagoon |
3.4 | Ion Exchange | 8.5 | Facultative Lagoon |
3.5 | Electrodialysis | 8.6 | Aerated Lagoon |
3.6 | Other Physicochemical Treatment | 8.7 | Constructed Wetland |
4 | Conventional Activated Sludge | 8.8 | Subsurface Flow Constructed Wetland |
4.1 | Aerobic Biological Treatment | 8.9 | Surface Flow Constructed Wetland |
4.2 | Activated Sludge | 8.10 | Land Infiltration |
4.3 | Adsorption/Biodegradation (A/B) | 9 | Membrane Bioreactor (MBR) |
5 | Enhanced Activated Sludge Process | 10 | Biological Treatment |
