Sustainable aquaculture through water recycling

Jegatheesan, V., and Manicom, C. (2003) Sustainable aquaculture through water recycling. In: Proceedings of the First International Symposium on Southeast Asian Water Environment. From: First International Symposium on Southeast Asian Water Environment, 23-25 October 2003, Bangkok, Thailand.

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Abstract

The discharge of nutrient rich effluent from aquaculture systems into coastal waters is cause for concern. Direct filtration of aquaculture wastewater, using floating medium and sand with in-line flocculation, and biological filtration using activated carbon, has the potential to improve water quality for recycling within aquaculture systems. This study looked at the performance of laboratory scale dual media and activated carbon filters in suspended solids and nutrient removal in the treatment of aquaculture wastewater. The dual media filter, with flocculant FeCl3 of 9mg/L, functioned best at a velocity of 7mJh with low headloss, and good turbidity and phosphorus removal (80% and 53% respectively). The activated carbon filter removed ammonia (84%) and nitrite (71 %) in the process of nitrification with a five-hour hydraulic retention time. This paper reports preliminary results from a longer term sustainable aquaculture project.

Item ID: 7628
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: activated carbon; aquaculture; engineering technology; filtration; sustainable development; water reuse
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ISBN: 9781-843-390-985
Date Deposited: 29 Jun 2010 23:07
FoR Codes: 10 TECHNOLOGY > 1002 Environmental Biotechnology > 100203 Bioremediation @ 40%
09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 30%
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060701 Phycology (incl Marine Grasses) @ 30%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830199 Fisheries - Aquaculture not elsewhere classified @ 60%
82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8298 Environmentally Sustainable Plant Production > 829899 Environmentally Sustainable Plant Production not elsewhere classified @ 20%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 20%
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