Effect of Shear Stress on Detachment in Biofilm Reactor under Low C/N Ratio

Abstract:

The aim of this study is to evaluate the effect of shear stress on detachment and nitrification process in a mixed-population biofilm. The biofilm was grown under constant flow condition with low C/N ratio. During the experiment, ammonium oxidation rate reached above 99%. Sloughing events happened mainly under constant hydrodynamic condition. Detachment experiment showed that it’s not possible to control the occurrence of sloughing events by controlling shear stress. Pyrosequencing analysis of the biofilm showed that Proteobacteria and Bacteroidetes were the two most abundant phyla, but detachment would influence the relative abundance of AOB and NOB in biofilm to affect the nitrification process.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 681-686
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.681
• Online since: June 2014
• Authors: Yin Jun, Heng Juan Xu
• Keywords: Biofilm, C/N Ratio, Detachment, Nitrification, Pyrosequencing, Shear Stress

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