4.5.2 Gate valves shutting flaps
6.1.7 Scrapers
6.1.8 Screens and strainers
6.2.8 Aeration installations
6.2.10 Aeration paddles
6.2.14 Pressure aeration
6.2.34 Surface aerators
6.2.53 Cylinder aerators
6.5.1 Adsorption systems
6.5.3 Microplastics removal
7.1.18 Sludge stirrers
7.2.5 Chamber filter presses
7.2.8 Mechanical surplus sludge thickeners
7.2.14 Sludge Screening
9.2.14 Central control equipment
19.3.3 Gate valves
19.3.9 Screens
19.3.10 Screen cleaning machines
19.3.13 Gates