| Acronym | Meaning |
| RAS | Returned Activated Sludge |
| IC | Ion Chromatography |
| MESIP | Modeling Environmental Scenarios In Ponds |
| NDPD | National Data Processing Division |
| HDES | Hydrodynamic Equilibrium System |
| HITC | 1,1',3,3,3',3'-hexamethylindotricarbocyanaine Iodide |
| PBIRG | Pharmaceutical Business Intelligence And Research Gro |
| SXAPS | Soft X-ray Appearance Potential Spectroscopy |
| CA | Chromosomal Abberation |
| URG | Umweltrahmengesetz (German Environmental Protection Framework Law) |