| Acronym | Meaning |
| KHN | Knoop Hardness |
| RBC | Rotating Biological Contactor |
| ARRP | Ammonia Removal And Recovery Process |
| ASE | Augmented Secular Equation |
| ABF | Activated Biofilter |
| EAS | Exposure Assessments |
| EPLD | Erasable Programmable Logic Device |
| SBS | Sick Building Syndrome |
| BPCC | 2,2'-bipyridinium Chlorochromate |
| CPESA | Coincidence-enhanced Proton Elastic Scattering Analysis |