1.1.12 Sludge treatment
7.3.1 Belt dryers
7.3.10 Disc dryers
7.3.12 Solar dryers
7.3.16 dryer, steam-heated
7.4.1 Bunkers, bunker removal systems
7.4.3 Flue gas treatment
7.4.5 Sludge incinerator plants (fluidised bed ovens, rack ovens, other ovens)
7.6.2 Phosphorus Recovery from ash