Effect of carbon to nitrogen ratio on the composition of microbial extracellular polymers in activated sludge
WATER SCIENCE AND TECHNOLOGY, vol.44, pp.221-229, 2001 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 44
- Publication Date: 2001
- Journal Name: WATER SCIENCE AND TECHNOLOGY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.221-229
- Keywords: activated sludge, carbohydrates, C/N ratio, extracellular polymers, proteins, EXTRACTION, BACTERIA, BIOFLOCCULATION, POLYSACCHARIDE, AGGREGATION, PROTEIN
- Middle East Technical University Affiliated: Yes
Abstract
Effect of carbon to nitrogen ratio (C/N) on the sludge extracellular polymer composition is studied in synthetically fed semi-continuous reactors with 8 days of sludge age. Results show that C/N ratio influences the relative distribution of polymer carbohydrate and protein. At low C/N ratio of 5, polymer extracts have high protein and low carbohydrate content. As the C/N ratio is increased to 17.5 and then to 40, carbohydrate concentration increases sharply and protein concentration decreases.