Table 5 Emission factors of different GHG emissions from discharge pathways.
From: Greenhouse gas emissions from municipal wastewater treatment facilities in China from 2006 to 2019
| Â | Â | CH4 | N2O | CO2 |
|---|---|---|---|---|
(g CH4/kg COD effluent) | (g N2O/kg TN effluent) | (g CO2/kg COD effluent) | ||
1 | Discharge into seas directly | 8.75 | 7.90 | 570.90 |
2 | Discharge into rivers, lakes, reservoirs etc. directly | 47.50 | 7.90 | 570.90 |
3 | Enter sewers first, then discharge into rivers, lakes, and reservoirs | 47.50 | 7.90 | 570.90 |
4 | Enter sewers first, then discharge into seas | 8.75 | 7.90 | 570.90 |
5 | Enter municipal WWPTs | 0.00 | 0.00 | 0.00 |
6 | Discharge into sewage irrigated farmlands directly | 0.00 | 8.00 | — |
7 | Discharge into soil | 0.00 | 8.00 | — |
8 | Enter other facilities (decentralized wastewater treatment facilities) | 0.00 | 0.00 | 0.00 |
9 | Centralized industrial WWTPs | 0.00 | 0.00 | 0.00 |
10 | Other discharge pathways | 27.50 | 7.90 | 570.90 |
