Table 4.
The discharge of pollutants of different sources.
| Pollution Source | Pollution Type | The Quantity of Pollutant Discharge (10,000 Ton/Year) | |||
|---|---|---|---|---|---|
| COD | TN | TP | N-NH4+ | ||
| NPS | Rural living source | 13.67 | 3.64 | 0.26 | 1.82 |
| Agricultural source | 10.06 | 2.01 | 1.68 | 1.47 | |
| Livestock and free range poultry sources | 0.19 | 0.01 | 0 | 0.01 | |
| Aquaculture source | 9.76 | 0.86 | 0.17 | 0.14 | |
| PS | Urban sewage treatment plant | 19.84 | 3.93 | 0.35 | 2.57 |
| Industrial point source | 0.95 | 0.15 | 0.01 | 0.08 | |
| Large-scale livestock and poultry breeding source | 0.031 | 0.002 | 0.0005 | 0.0004 | |
| Phosphogypsum yard source | 0 | 0 | 0.003 | 0 | |
| Total | 54.5 | 10.60 | 2.47 | 6.09 | |