Notice of RetractionINT-ETS activity change of activated sludge during nitrification, denitrification and organism removal in SBR process

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

In this study, the variation rule of biological activity of activated sludge in organic matter biodegradation, nitrification and denitrification process in SBR system was investigated by determining INT-ETS activity of various influent nitrogen and organic shock loading. The experimental results showed that: INT-ETS activity could provide a good indication of the ongoing biological reactions of SBR system; Biological activity of organic matter biodegradation, nitrification and denitrification process in SBR system reduced orderly, observably, INT-ETS activity reduced from 232.59mg/(g·h) to 190.65mg/(g·h) and finally to 113.88 mg/(g·h) when influent concentration of COD and NH4+-N was 300mg/L and 40mg/L, respectively. In addition, various influent Nitrogen and organic shock loading experimentations cure explained that operational conditions showed no obvious effect on INT-ETS variation rule, however, the time of the appearance of feature points marking different reaction phase was influenced.