Ultrasonication as a pre-treatment method for the enhancement of the psychrophilic anaerobic digestion of aquaculture effluents

B. L. McDermott, A. D. Chalmers, J. A S Goodwin

Research output: Contribution to journalArticle

Abstract

The effectiveness of ultrasonication as a pre-treatment method for the psychrophilic anaerobic treatment of aquaculture effluents was assessed using a 4 1 solids digester. Ultrasonication of aquaculture wastewater was found to enhance the removal of chemical oxygen demand by anaerobic digestion by almost 10%. There was also a concurrent increase in total biogas production from 0.29 1 day-1 to 0.45 1 day-1 with a corresponding 10% increase in methane concentration. Furthermore, there was an increase of 60% in effluent total ammonia nitrogen concentration as a result of sonication in comparison with a 45% increase for untreated digester waste.

Original languageEnglish
Pages (from-to)823-830
Number of pages8
JournalEnvironmental Technology
Volume22
Issue number7
DOIs
Publication statusPublished - 2001

Keywords

  • Anaerobic digestion
  • Aquaculture effluents
  • Biogas yield
  • Ultrasonication

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