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Reductions in nutrient discharge from aquaculture through recycling of water utilising floating media and activated carbon filtration

Steicke, Christopher, Jegatheesan, Veeriah and Zeng, Chaoshu 2005, Reductions in nutrient discharge from aquaculture through recycling of water utilising floating media and activated carbon filtration, in Rainforest meets Reef : Joint conference of CRC Reef and Rainforest CRC conference abstracts, CRC Reef Research Centre, Townsville, Qld., pp. 112-112.

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Title Reductions in nutrient discharge from aquaculture through recycling of water utilising floating media and activated carbon filtration
Author(s) Steicke, Christopher
Jegatheesan, Veeriah
Zeng, Chaoshu
Conference name CRC Reef and Rainforest CRC. Joint conference (2005 : Townsville, Qld.)
Conference location Townsville, Qld.
Conference dates 22-24 Nov. 2005
Title of proceedings Rainforest meets Reef : Joint conference of CRC Reef and Rainforest CRC conference abstracts
Editor(s) Goggin, Louise
Harvey, Tim
Publication date 2005
Conference series CRC Reef and Rainforest CRC. Joint conference
Start page 112
End page 112
Total pages 1
Publisher CRC Reef Research Centre
Place of publication Townsville, Qld.
Summary Nutrient discharge into coastal areas, such as the Great Barrier Reef can result in the degradation of coastal ecosystems. For example, excess nitrogen and phosphorus can damage corals through inducing algal bloom and subsequent shading. Excessive phosphorus can further weaken coral skeletons making them susceptible to damage. Land based industries such as aquaculture can contribute to such problems. This study set out to develop a system whereby water from aquaculture can be constantly reused resulting in minimized waste discharge. A three-stage filtration system utilizing floating media and activated carbon was designed to harness bacterial processes that could reduce both particulate and dissolved compounds to the extent whereby approximately 100% reuse of the wastewater became possible. This involved efficient and effective particulate and biological removal mechanisms in both aerobic and anaerobic zones of the filtration system. This design reduced dissolved nitrogen levels by up to 70% and maintained low phosphorus levels, which allowed the reuse of water for the successful culture of barramundi with a survival rate of 97% over 25 days. This pilot scale study demonstrated the potential of reusing aquaculture wastewater from the viewpoint of reducing nutrient input into coastal environments. Future research will refine these processes and assess the performance of the system at several commercial scale applications.
ISBN 1876054727
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category E3.1 Extract of paper
ERA Research output type E Conference publication
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039590

Document type: Conference Paper
Collection: School of Engineering
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