| Acronym | Meaning |
| ODLTS | Optical Deep Level Transient Spectroscopy |
| CAST | Cyclic Activated Sludge Technol. |
| RFE | Recursive Feature Elimination |
| CAP | Corrective Action Plan |
| OBIC | Optical Beam Induced Current |
| PEN | Polyethylene Naphthalate |
| POE | Point Of Entry |
| PPBA | Plane-wave Plane-wave Born Approximation |
| ARC | Accelerating Rate Calorimetry |
| ASH | Air-sparged Hydrocyclone |