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

journal contribution
posted on 2023-05-18, 00:51 authored by Cahill, P, Catriona HurdCatriona Hurd, Lokman, M
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.

History

Publication title

Aquaculture: An International Journal Devoted to Fundamental Aquatic Food Resources

Volume

306

Pagination

153-159

ISSN

0044-8486

Department/School

Institute for Marine and Antarctic Studies

Publisher

Elsevier Science Bv

Place of publication

Po Box 211, Amsterdam, Netherlands, 1000 Ae

Rights statement

Copyright 2010 Elsevier B.V.

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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