5/2-Way commutating valve, particularly for reverse-flush filter
Activated carbon filter having plural layers
Activated sewage plant and process
Adsorption filter with desorption device
Aeration tank control valve system
Agitator for solids-containing vessels
Air duct block for air/water underdrain systems in gravity filte
Air/water distributor underdrain
Airtight waste solution sampling apparatus
Apparatus and method for distributing liquid containing evolvabl
Apparatus and method for rehabilitating a traveling bridge...
Apparatus and process for treating water
Apparatus for directing fluids through a filter system
Apparatus for directing fluids through a filter system
Apparatus for filter backwashing
Apparatus for granular media filter
Apparatus for minimizing wastewater discharge
Apparatus for pre-concentration of a sample for spectroscopical
Apparatus for separating solid and liquid
Apparatus for the countercurrent treatment of liquids with adsor