Device for aerating sewage or sewage-sludges
Device for affixing a filter mesh to the drum of a rotary drum f
Device for biological digestion of sewage
Device for biological fluid treatment
Device for biological treatment of liquid, especially sewage
Device for biological wastewater treatment
Device for flushing and aerating a surface coated with microorga
Device for maintaining bacterial levels within an organic waste
Device for purifying sewage
Device for purifying waste water, according to the activated...
Device for solids recycle in longitudinal-flow fluid-bed reactor
Device for the purification of waste water
Device for treatment of wastewater by means of anaerobic ferment
Device of three-chamber type for purifying liquid
Distributor/collector system
Dual cell nitrogen removal apparatus
Ecological apparatus for processing sewage
Ecological fluidized bed system
Effluent treatment system
Energy-efficient biological treatment system with filtration...