Resistance and resilience of small-scale recirculating aquaculture systems (RAS) with or without algae to pH perturbation.

ABSTRACT: The experimental set-up of this study mimicked recirculating aquaculture systems (RAS) where water quality parameters such as dissolved oxygen, pH, temperature, and turbidity were controlled and wastes produced by fish and feeding were converted to inorganic forms. A key process in the RAS was the conversion of ammonia to nitrite and nitrite to nitrate through nitrification. It was hypothesized that algae inclusion in RAS would improve the ammonia removal from the water; thereby improving RAS water quality and stability. To test this hypothesis, the stability of the microbiota community composition in a freshwater RAS with (RAS+A) or without algae (RAS-A) was challenged by introducing an acute pH drop (from pH 7 to 4 during three hours) to the system. Stigeoclonium nanum, a periphytic fres

SUBMITTER: Mohamed Ramli N 

PROVIDER: S-EPMC5901992 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature