 |
| |||
| effluent treatment | |||
| sewage treatment; wastewater treatment; sewage and effluent handling (US) | |||
| waste processing; waste treatment | |||
| traitement des effluents: 20 phrases in 5 subjects |
| Earth sciences | 1 |
| Environment | 16 |
| Name of organization | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |