A Comparison of pH‐controlled and Dissolved Oxygen‐controlled Nutrient Addition for the Maintenance of Steady‐state in a Mixed Continuous Culture

K. ROBINSON*, D. FENLON

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Controlled substrate addition was used to maintain mixed microbial cultures in fermenters at either pH 7.0 or 70% dissolved oxygen saturation. Control of pH permitted a greater volume of substrate to be processed. Ammonium nitrogen concentrations were similar for both fermenters but concentrations of oxidized nitrogen varied. Nitrification/denitrification sequences appeared to be initiated by unscheduled changes in dissolved oxygen concentration. It was possible to maintain a steady state with respect to a controlled parameter and end‐product quality but other parameters fluctuated.

Original languageEnglish
Pages (from-to)393-403
Number of pages11
JournalJournal of Applied Bacteriology
Volume42
Issue number3
DOIs
Publication statusPrint publication - Jun 1977

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