Packing elements

Particle separator device with circulation of fluid, with double

Peat bale filtration element

Pellet media to support growth of microorganisms and systems for

Phytorecovery of metals using seedlings

Plant for wastewater treatment

Plastics articles

Porous polymeric biosupports

Prefabricated biological purification system

Prefabricated panels for sub-surface sewage effluent and waste w

Process and apparatus for microbial filtration and bacterial...

Process and apparatus for treating and purifying waste water

Process control oxidation

Process for treating waste water and an apparatus therefor

Random packing materials

Reactor for injection of gas into a liquid

Reactor for purification of water

Reciprocating biological contactor and method of use

Recirculation of wastewater in a filtration bed

Reef biological filtration device