Notice of RetractionStudy on joint acid fermentation test of excess sludge and distiller´s grains

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.

By the intermittent test, we studied the acid fermentation rule after mixing excess sludge and distiller´s grains. The results showed that the control sample and by the proportion of 0.2g/gTS, 0.4g/gTS, 0.6g/gTS added distiller´s grains to the 4 reactors, the maximums of SCOD reached 775.83mg/L, 1136.92 mg/L, 1427.77mg/L and 2609.48mg/L, the TS loss ratios were 12.00%, 15.69%, 16.92% and 19.25%. With the increasing amount of distiller´s grains added in, improving the performance of sludge dewatering centrifuge. At the same time, the activity of micro-organisms in the sludge is even greater. By means of molecular biology active sludge of microbial extract DNA, then PCR amplification, DGGE separation of PCR products, obtained fingerprints of microbial sludge. The results from the perspective of molecular biology to further confirm the above view. The acid fermentation after mixing sludge with distiller´s grains can achieve on both resource use and the purpose of sludge reduction.