PROJECT NUMBER
•
2019-149
PROJECT STATUS:
CURRENT
ORGANISATION:
Fisheries Research and Development Corporation (FRDC)
107,683 results
PROJECT NUMBER
•
2019-148
PROJECT STATUS:
COMPLETED
ORGANISATION:
CSIRO Australian Animal Health Laboratory
PROJECT NUMBER
•
2019-147
PROJECT STATUS:
COMPLETED
Risk factors and management strategies associated with summer mortality in Australian abalone
In this project, we reviewed the scientific literature and collaborated with Australian abalone growers to develop a case definition for summer mortality. The case definition developed for summer mortality is as follows:
i. Chronic mortality of unknown cause (if in doubt take this to mean...
ORGANISATION:
University of Adelaide
SPECIES
PROJECT NUMBER
•
2019-146
PROJECT STATUS:
COMPLETED
National Recreational Fishing Conference bursary 2019
Introduction
Over the 10th and 11th of December 2019, the Australian Recreational Fishing Federation held their biannual National recreational Fishing Conference in Hobart, Tasmania. The theme of this conference was “Our Fishing. Our Research. Our Recreational Future”.
In response to...
ORGANISATION:
Fisheries Research and Development Corporation (FRDC)
PROJECT NUMBER
•
2019-145
PROJECT STATUS:
COMPLETED
ORGANISATION:
Austral Fisheries Pty Ltd
SPECIES
PROJECT NUMBER
•
2019-144
PROJECT STATUS:
COMPLETED
ORGANISATION:
University of Adelaide
PROJECT NUMBER
•
2019-143
PROJECT STATUS:
CURRENT
ORGANISATION:
Monash University Clayton Campus
PROJECT NUMBER
•
2019-142
PROJECT STATUS:
COMPLETED
Resource Sharing in Australian Fisheries Workshop - Progress to Date, Lessons Learnt and Next Steps towards a harmonised approach
Resource sharing is a high priority for the Australian Fisheries Managers Forum (AFMF) with all Australian jurisdictions in the process of developing or having developed policies associated with this issue. Some have gone further and implemented resource sharing with limited success....
ORGANISATION:
FutureCatch Consulting
PROJECT NUMBER
•
2019-140
PROJECT STATUS:
COMPLETED
ORGANISATION:
Pearl Producers Association (PPA)
Evaluation of nanobubble technology in aquaculture
Project number:
2019-139
Project Status:
Completed
Budget expenditure:
$294,869.00
Principal Investigator:
Igor Pirozzi
Organisation:
Department of Primary Industries and Regional Development (NSW)
Project start/end date:
30 Jun 2021
-
29 Jun 2023
Contact:
FRDC
TAGS
In intensive aquaculture systems oxygen supplementation is necessary to prevent hypoxia; however, oversupply can hyper-saturate systems causing gas bubble disease. Oxygenation in aquaculture, fish holding and transport systems using standard technologies is extremely inefficient; standard oxygen transfer efficiencies (SOTE) are estimated at between 2 and 6% per m submergence for coarse and fine bubble diffusers, respectively, at standard conditions of 0 ppt salinity and 20 °C. Advances in the efficiency of gas–liquid phase processes has seen the emergence of nanobubble technologies producing ultrafine bubbles (⌀ 1 µm). The advantage of nanobubbles over larger micro/macrobubbles is that they are neutrally buoyant, negatively charged and can remain within the water column, potentially for weeks. Nanobubble technologies now have a demonstrated application across a broad variety of industries including wastewater treatment, biomedical engineering, gas and oil industry, agriculture, and the food industry. Surprisingly, outside of Japan, there has been little research on the application of nanobubble technology to the aquaculture sector. Nanobubble technology can potentially improve oxygen delivery systems for fish stock and water treatment in aquaculture systems, improving the nitrifying capacity of biofilters and efficiencies in fractionation units. However, there are currently no reliable studies demonstrating the efficacy of nanobubble technology, nor any assessment of the potential health impacts on fish in aquaculture systems. We have undertaken a preliminary pilot trial with encouraging results. Oxygenation was applied to a recirculating aquaculture system via nanobubble injectors for 10 days and fish (yellowtail kingfish) were observed to feed and behave normally when compared to a control group. Before this technology can be considered for broader adoption, a thorough long term investigation needs to be undertaken to assess the long term health effects on fish stock held in nanobubble oxygenated water and the suitability for application of this technology to the aquaculture industry.
1. To demonstrate the efficacy of nanobubble technology for use in finfish aquaculture by:i) assessing the health, growth and feed conversion efficiencies of fish cultured in a recirculating aquaculture system at different temperatures, salinities and stocking densities exposed to nanobubblesii) determining the effect of nanobubble oxygenation on waste water treatment efficiencies in a recirculating aquaculture system.iii) providing a preliminary cost benefit analysis on the implementation of nanobubble aeration to an aquaculture system
Final report
Author:
Igor Pirozzi
Final Report
•
2025-02-21
•
2.76 MB
2019-139-DLD.pdf
Nanobubble (NB) technology, i.e. the production of ultrafine bubbles with diameters <1 µm, is an emerging field which has the potential to greatly improve oxygenation efficiencies in aquaculture production. Before this technology can be considered for adoption by the aquaculture industry, a thorough assessment of the health and growth effects on fish stock held in NB oxygenated water is required. Three trials were conducted to compare NB technology with conventional oxygenation setup (ceramic diffusers and air stones, oxygen gas and air) in a recirculating aquaculture system (RAS) under a number of different aquaculture scenarios testing i) stocking density, ii) salinity, and iii) temperature.
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