Zero Discharge & Water Recycling

Hydro Air - Membrane Separation Systems

Membrane separation (Microfiltration, Ultrafiltration, Nanofiltration and Reverse Osmosis) is the key technology of Hydroair process, a “clean” technology not using either chemicals or heat, not generating either air pollution or noise problems, allowing removal of contaminants, water recycling and byproducts recovery.

1

Depending on the quality of the effluent to be treated, the first step of “Zero Discharge Water Recycling” process is bioHAR® Membrane Bioreactor system, that is a high efficiency combination of biological activated sludge and membrane processes.

2

The second step is NARO® system, a registered mark for an advanced membrane process that can concentrate the residual contaminants coming from bioHAR® to very high dissolved solids content, achieving excellent energy efficiency and optimal membranes performance.
The NARO® concentrate, still liquid, can be further reduced in volume through the evaporation / crystallization step, while the NARO® permeate can be directly reused or discharged according to the local regulations.