Nutrient removal from aquaculture wastewater by vegetable production in aquaponics recirculation system.

Endut, Azizah and Jusoh, Ahmad and Ali, Nora’aini and Wan Nik, Wan Norsani and Hassan, Anuar (2010) Nutrient removal from aquaculture wastewater by vegetable production in aquaponics recirculation system. In: Challenges in Environmental Science and Engineering, 26 Sept.-1 Oct 2010, Cairns, Australia.

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Abstract

The integration of aquaculture with agriculture appears to be an excellent way of saving water, disposing aquaculture wastewater and providing fertilizer to the agricultural crop. The objective of this study was to evaluate the efficiency of vegetables as a source of biomass production in removing inorganic nitrogen and phosphate from aquaculture wastewater. The study was carried out in a pilot scale of recirculation aquaponics system. The system is composed of culture tank, hydroponics trough, sand filtration tank, sump system, water holding tank and reservoir (pre aeration) and was operated for around seven months. Three plants namely water spinach, mustard green and celery were cultivated in a closed gravel hydroponic trough, where African catfish waste was used as a nutrient solution. The results showed that water spinach had the fastest growth and the highest reduction in nutrient removal compared with mustard green. The plants were able to remove the pollutants in wastewater even though substantial amounts of soluble and insoluble substances were released by seeds during the germination period. Concentration of TAN, nitrite-N, nitrate-N and orthophosphate in the systems was significantly reduced compared to the control trough. Water spinach and mustard green grow well in this type of aquaponics system. Removal of ammonium and nitrite were sufficient for recycle in the aquaculture system without danger of harming the fish. Integration of vegetables into African catfish culture system was therefore one of the best alternatives for achieving economic and environmental sustainability.

Item Type: Conference or Workshop Item (Paper)
Keywords: Recirculation aquaponics system; Aquaculture wastewater ; Nutrient solution ; African catfish waste; Water spinach; Mustard green
Subjects: Q Science > Q Science (General)
Faculty / Institute: East Coast Environmental Research Institute (ESERI)
Depositing User: AP DR AZIZAH ENDUT
Date Deposited: 08 Nov 2015 04:02
Last Modified: 08 Nov 2015 06:47
URI: http://erep.unisza.edu.my/id/eprint/3789

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