Halophytes for the treatment of saline aquaculture effluent

J. Jed Brown, Edward P. Glenn, Kevin M. Fitzsimmons, Steven E. Smith

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

We determined the feasibility of using salt-tolerant plants (halophytes) as biofilters to remove nutrients from saline aquaculture wastewater. Suaeda esteroa, Salicornia bigelovii and Atriplex barclayana (Chenopodiaceae), species with potential as forage and oil seed crops, were grown in sand in draining containers (lysimeters) in a greenhouse experiment. They were irrigated to meet evapotranspiration demand and to produce a 0.3 leaching fraction, using aquaculture effluent generated from an intensive tilapia culture system. The effluent salinity was increased with NaCl to make salinity treatments of 0.5, 10 and 35 ppt. The plant-soil system removed 98% and 94% of the applied total and inorganic nitrogen, respectively. It removed 99% and 97% of the applied total and soluble reactive phosphorus, respectively. High removal rates occurred despite the high leaching fraction. Salt inhibited (P < 0.05) the growth rate, nutrient removal, and volume of water that all three plant species could process. Suaeda and Salicornia, which are succulent salt marsh species, performed better than the desert saltbush, Atriplex, at the higher salinities.

Original languageEnglish (US)
Pages (from-to)255-268
Number of pages14
JournalAquaculture
Volume175
Issue number3-4
DOIs
StatePublished - May 15 1999

Keywords

  • Atriplex barclayana
  • Effluent
  • Halophytes
  • Salicornia bigelovii
  • Suaeda esteroa

ASJC Scopus subject areas

  • Aquatic Science

Fingerprint Dive into the research topics of 'Halophytes for the treatment of saline aquaculture effluent'. Together they form a unique fingerprint.

  • Cite this