title: [Non-filamentous activated sludge bulking caused by the deficiency of nitrogen].
abstract: The effect of nitrogen deficiency on activated sludge bulking was studied specially in some experiments carried on a sequencing batch reactor fed with beer wastewater in this paper. The experimental results showed that the sludge settled properly at a influent BOD/N value of 100/4. When the value of BOD/N was 100/3 and 100/2 respectively, non-filamentous activated sludge bulking caused by an excessive growth of viscous Zoogloea with high moisture content occurred. When the value of influent BOD/N was 100/0.94, more serious non-filamentous bulking occurred. Furthermore, the effect of nitrogen deficiency on the nitrogen sources and phosphorus sources utilization rate and the COD removal rate was studied in the experiments.
authors.affiliation: College of Environment and Energy Engineering, Beijing Institute of Technology, Beijing 100022, China.
authors.forename: C
authors.initials: C
authors.lastname: Gao
authors.forename: Y
authors.initials: Y
authors.lastname: Peng
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001515:Beer; D007220:Industrial Waste; D009584:Nitrogen / Q000378:metabolism*; D010758:Phosphorus; D012722:Sewage
chemical_list: D007220:Industrial Waste; D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen