| AEL | Associated emission levels |
| BAT | Best available technology |
| BF | Bag filter |
| BREF | Best reference methods |
| CIP | Cleaning in place |
| CTA | Cellulose triacetate |
| DFG | Dry flue gas |
| DNA | Deoxyribonucleic acid |
| DSI | Duct sorbent injection |
| EDI | Electrodeionization |
| ESP | Electrostatic precipitator |
| EU | European Union |
| FG | Flue gas |
| FGC | Flue gas cleaning |
| FGD | Flue gas desulphurization |
| FNU | Formazine nephelometric units |
| GTM | Gas transfer membrane |
| HD-SCR | High dust SCR |
| HM | Heavy metal |
| HMX | Heavy metal ion exchanger |
| MBX | Mixed bed ion exchanger |
| MF | Microfilter |
| NTU | Nephelometric turbidity units |
| RO | Reverse osmosis |
| SCR | Selective catalytic reduction |
| SIX | Softening ion exchanger |
| SNCR | Selective non-catalytic reduction |
| TOC | Total organic carbon |
| UF | Ultrafiltration |
| UV | Ultraviolet |
Flue gas condensation is the cooling of flue gas below its dew point. It produces heat from the condensation of the water content of the flue gas and it produces flue gas (FG) condensate. The FG condensate must be treated for discharge or reuse, hence the term FG condensate treatment.
FG condensate treatment is a specialty of the Nordic countries, where it has been developed since the mid-1980s. Today, the technique is well established and widespread in this region. This white paper summarizes the experiences gained in the Nordic countries to provide best practices to current and new users and build a bridgehead for other countries that may use the technology in combined heat and power production.
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