Methanogenic granular sludge formation in an upflow anaerobic sludge blanket reactir treating synthetic methanolic waste
✍ Scribed by Z. I. Bhatti; K. Furukawa; M. Fujita
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 746 KB
- Volume
- 11
- Category
- Article
- ISSN
- 1573-0972
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✦ Synopsis
A laboratory upflow anaerobic sludge blanket reactor, seeded with fine, suspended, bacterial floc with 1.76 g volatile suspended solids/l, was used to treat synthetic methanolic waste. After 180 days of continuous peration, granular sludge with discrete granules of 1 to 2 mm diam. was formed, with 52 g volatile suspended solids/l. Granules were brown, relatively soft and had a settling velocity of 1.61 cm/s. Extracellular polymeric matter extracted from the granular sludge had high carbohydrate content but low nucleic acid content. The ash of the granular sludge contained Na(+), K(+) and Mg(2+) up to 15.0, 11.7 and 3.75 mg/g, respectively. Scanning and transmission electron microscopy revealed that the granular sludge was dominated by methanogens resembling Methanosarcina.