Biotechnology of anaerobic digestion enhanced by iron-reducing bacteria.
Tay, Stephen Tiong Lee.
Date of Issue2003
School of Civil and Environmental Engineering
The aim of the research project was to study and optimize anaerobic treatment of organic and sulfate-containing wastewater under different dosage of iron-containing compounds. Anaerobic sludge of municipal wastewater treatment plant can be used for enrichment culture of iron-reducing bacteria (IRB) with maximum iron reduction rate 3.5 mg/l h for ferrihydrate and 0.75 mg/l h for iron-containing clay. Iron-containing clay, iron hydroxide, and ferric pyrophosphate were studied as the sources of Fe (III) for iron-reducing bacteria. Best source for iron reduction was dissolved ferric pyrophosphate, but most reasonable source for wastewater treatment can be iron hydroxide. Iron- reducing activity of isolated pure cultures was just 60 to 70% of the activity of related enrichment cultures.
DRNTU::Engineering::Environmental engineering::Water treatment
Nanyang Technological University