Introducing ZWC technology

-means less intake water to disinfect and less discharge water to treat.

AKVA group land based zero water concept zwc

The Zero Water Concept (ZWC) significantly reduces the consumption of new water for the RAS. The technology is a 3-step sludge handling process. It works by de-nitrification of the RAS process water, converting nitrate into free nitrogen that is released in the air. The water is returned to the RAS after a step that removes phosphorus and other inorganic compounds from the process water.

The ZWC technology is used in areas with limited access to new water, or when extra treatment of the effluent water is required.
The saving of water using ZWC can be up to ten times the RAS’s water consumption, depending on the RAS’s intensity.