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Ca2+ augmentation for enhancement of aerobically grown microbial granules in sludge blanket reactors
He-Long Jiang1, Joo-Hwa Tay, Yu Liu
1Environmental Engineering Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
Biotechnology Letters
|July 29, 2003
Abstract:
Two sequential aerobic sludge blanket reactors were concurrently operated to examine the effect of Ca2+ augmentation on aerobic granulation. Augmentation with 100 mg Ca2+ l(-1) significantly decreased the time to cultivate aerobically grown microbial granules from 32 d to 16 d. Ca2+-fed granules were denser and more compact, showed better settling and strength characteristics, and had higher polysaccharide contents.