Related Experiment Video
Updated: Apr 4, 2026

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
Published on: September 26, 2016
Influence of microbial community structure of seed sludge on the properties of aerobic nitrifying granules
Zhiwei Song1, Ting Li1, Qiuxu Wang1
1School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China.
Abstract:
In order to evaluate the influence of microbial community structure of seed sludge on the properties of aerobic nitrifying granules, these granules were cultivated with different seed sludge, and the variation of microbial community and dominant bacterial groups that impact the nitrogen removal efficiency of the aerobic nitrifying granules were analyzed and identified using 16s rDNA sequence and denaturing gradient gel electrophoresis (DGGE) profiles. The results presented here demonstrated that the influence of the community structure of seed sludge on the properties of aerobic nitrifying granules was remarkable, and the granules cultivated by activated sludge from a beer wastewater treatment plant showed better performance, with a stable sludge volume index (SVI) value of 20mL/g, high extracellular polymeric substance (EPS) content of 183.3mg/L, high NH4(+)-N removal rate of 89.42% and abundant microbial population with 10 dominant bacterial groups. This indicated that activated sludge with abundant communities is suitable for use as seed sludge in culturing aerobic nitrifying granules.
Related Concept Videos
Soil Microbial Ecology
Microbial Mats
Environmental Applications of Microorganisms
Microbes and Climate Change
Marine Microbial Ecology
Microenvironments

