Year-end Sale % OFF 
Abstract
Integrated multi-trophic aquaculture (IMTA) is a promising direction for the sustainable development of aquaculture. Microalgae have good potential to be integrated with recirculating aquaculture systems because they can use the nitrogen excreted from fish and share the same optimal pH value as in aquaculture. As a byproduct, the microalgae biomass can be used for fish feed or biofuel. However, the recirculating fish-microalgae IMTA system is under constant threat from fish pathogens and phytoplankton-lytic bacteria. Therefore, it is necessary to apply proper disinfectants as prophylaxis or treatment which are effective against these threats, but safe to fish and microalgae. For this purpose, peracetic acid (PAA) is a valid option because it is highly effective against fish pathogens and bacteria at low concentrations and degrades spontaneously to harmless residues. In the present study, we exposed the culture of a marine microalgae Tetraselmis chuii once per day for four days to four PAA products with differing hydrogen peroxide (H2O2)/PAA proportions at two concentrations (1 and 2mgL−1 PAA). The H2O2 solutions at equivalent total peroxide (H2O2+PAA) concentrations were tested in parallel. The results show that the growth and photosynthesis of T. chuii were not affected by three of the PAA products (Wofasteril® E400, Wofasteril® E250 and Applichem® 150) and equivalent H2O2 solutions at both concentrations. In contrast, Wofasteril® Lspez and an equivalent H2O2 solution at both concentrations caused irreversible culture collapse, photosynthesis dysfunction and irreversible cell damage. In conclusion, PAA products with low proportions of H2O2 are optimal disinfectants for fish-microalgae IMTA systems.
Highlights
The growing world population has an increasing demand for high quality proteins
The results show that the growth and photosynthesis of T. chuii were not affected by three of the peracetic acid (PAA) products (Wofasteril® E400, Wofasteril® E250 and Applichem® 150) and equivalent H2O2 solutions at both concentrations
The toxicity of these commercial PAA products to T. chuii should initially consist of the concurrent effects of PAA and H2O2, and after the complete decay of PAA, the effect of H2O2 alone
Summary
The growing world population has an increasing demand for high quality proteins. Based on the estimation of Tilman and Clark (2014), the global average dietary composition of fish and other seafood will increase 82% from 2009 to 2050. As discussed by Naylor et al (2000), many traditional aquaculture practices cause environmental and/or biological pollution and threaten fisheries by the use of fish oil and/or fish meal; they suggested that only sustainable aquaculture could help increase the supply of fish without harming natural ecosystems or fisheries. One option of sustainable aquaculture is the integrated multi-trophic aquaculture (IMTA) system. Hydroponics needs lower pH than aquaculture, so the water from aquaculture must be acidified and buffered. Many algae species grow at the same pH
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
