Table 2 Default GHG emission factors of biological treatment technologies in this study and in IPCC 2019.
From: Greenhouse gas emissions from municipal wastewater treatment facilities in China from 2006 to 2019
No. | Biological treatment technology | IPCC 2019 | This study | |||
|---|---|---|---|---|---|---|
CH4 | N2O | CH4 | N2O | CO2 | ||
g CH4/kg COD | g N2O /kg TN influent | g CH4/kg COD removed (No. 1–11); g CH4/kg COD (No, 12–27) | g N2O /kg TN influent | g CO2/kg COD removed | ||
1 | Aerobic Biological Treatment | 7.50 | 25.00 | 0.70 | 1.20 | 560.00 |
2 | Activated sludge | 7.50 | 25.00 | 0.70 | 1.20 | 560.00 |
3 | AO | 7.50 | 25.00 | 0.74 | 13.94 | 365.75 |
4 | A2O | 7.50 | 25.00 | 2.66 | 6.19 | 375.53 |
5 | OD | 7.50 | 25.00 | 4.27 | 2.18 | 510.65 |
6 | SBR | 7.50 | 25.00 | 1.76 | 43.60 | 531.80 |
7 | AB | 7.50 | 25.00 | 0.70 | 1.20 | 560.00 |
8 | Biofilm | 0.00 | 25.00 | 0.00 | 11.67 | 436.20 |
9 | Biofilter | 0.00 | 25.00 | 0.00 | 11.67 | 436.20 |
10 | Rotating Biological Contactor | 0.00 | 25.00 | 0.00 | 11.67 | 436.20 |
11 | Biological Contact Oxidation | 0.00 | 25.00 | 0.00 | 11.67 | 436.20 |
12 | Anaerobic Biological Treatment | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
13 | Anaerobic Hydrolysis | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
14 | Typical Anaerobic Reactors | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
15 | Anaerobic Biofilter | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
16 | Other Anaerobic Biological Treatment | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
17 | Stabilization Pond, Constructed Wetland and Land Treatment | 68.06 | 11.98 | 68.06 | 11.98 | 502.91 |
18 | Stabilization Lagoon | 66.25 | 18.75 | 66.25 | 18.75 | 515.13 |
19 | Oxidation Lagoon | 7.50 | 25.00 | 7.50 | 25.00 | 560.00 |
20 | Anaerobic Lagoon | 200.00 | 0.00 | 200.00 | 0.00 | 380.50 |
21 | Facultative Lagoon | 50.00 | 25.00 | 50.00 | 25.00 | 560.00 |
22 | Aerated Lagoon | 7.50 | 25.00 | 7.50 | 25.00 | 560.00 |
23 | Constructed Wetland | 42.50 | 4.94 | 42.50 | 4.94 | 482.54 |
24 | Subsurface Flow Constructed Wetland | 13.75 | 6.39 | 13.75 | 6.39 | 482.54 |
25 | Surface Flow Constructed Wetland | 100.00 | 2.04 | 100.00 | 2.04 | 482.54 |
26 | Land Infiltration | 125.00 | 0.70 | 125.00 | 0.70 | 502.91 |
27 | Biological Treatment | 7.50 | 25.00 | 7.50 | 25.00 | 560.00 |
