title: Effect of carbon to nitrogen ratio on the composition of microbial extracellular polymers in activated sludge.
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.
authors.affiliation: Department of Environmental Engineering, Middle East Technical University, Ankara, Turkey.
authors.forename: B
authors.initials: B
authors.lastname: Durmaz
authors.forename: F D
authors.initials: FD
authors.lastname: Sani
mesh_terms: D001419:Bacteria; D002241:Carbohydrates / Q000032:analysis; D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D004784:Environmental Monitoring; D005427:Flocculation; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011506:Proteins / Q000032:analysis; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014865:Waste Disposal, Fluid
chemical_list: D002241:Carbohydrates; D011108:Polymers; D011506:Proteins; D012722:Sewage; D002244:Carbon; D009584:Nitrogen