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Keeping the water clean - Seaweed biofiltration outperforms traditional bacterial biofilms in recirculating aquaculture


Cahill, P and Hurd, CL and Lokman, M, Keeping the water clean - Seaweed biofiltration outperforms traditional bacterial biofilms in recirculating aquaculture, Aquaculture: An International Journal Devoted to Fundamental Aquatic Food Resources, 306 pp. 153-159. ISSN 0044-8486 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 Elsevier B.V.

DOI: doi:10.1016/j.aquaculture.2010.05.032


In order to compare the efficacy of seaweeds and bacterial biofilm for removing nitrogenous wastes from recirculating marine aquaculture, Ulva lactuca L., Undaria pinnatifida Suringar, and a trickling biofilm filter were introduced to systems housing Haliotis iris Gmelin. Experiments were triplicated and run for 14 days. Although biofilm filtration maintained ammonium at low concentrations (around 0.10 mg l−1), nitrate levels increased linearly over time, reaching 2.30 mg l−1. Seaweeds maintained ammonium at concentrations that were consistently lower (around 0.03 mg l−1) than those observed with biofilm filtration. Moreover, nitrates were undetectable and pH less variable, whilst valuable seaweed biomass, with increases up to 50%, was generated. Seaweed filtration thus has the potential to improve the efficiency and productivity of recirculating aquaculture, via enhanced culture conditions and the production of economically valuable biomass.

Item Details

Item Type:Refereed Article
Keywords:Water qualtiy, nutrients, aquaculture, biofilms, seaweed
Research Division:Environmental Sciences
Research Group:Climate change impacts and adaptation
Research Field:Climate change impacts and adaptation not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Hurd, CL (Professor Catriona Hurd)
ID Code:91478
Year Published:2010
Web of Science® Times Cited:32
Deposited By:IMAS Research and Education Centre
Deposited On:2014-05-20
Last Modified:2014-06-12

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