Study sheds light on the impact of hydrogen sulphide in RAS

Study sheds light on the impact of hydrogen sulphide in RAS

Source: The Fish Site

10/6/2022

Study sheds light on the impact of hydrogen sulphide in RAS

Credit: Kevin Stiller, Nofima.

Salmon can cope well when exposed to low levels of hydrogen sulphide (H2S) in recirculating aquaculture systems (RAS) over time, but spikes in the levels can be very serious, according to new research.

In land-based fish farms, salmon live in fresh water until they smoltify, when they are transferred to seawater. When this seawater is recirculated it passes through a biofilter where it is purified. However, H2S gas can quickly form in the biofilter, causing the fish to die.