Notice of RetractionFinal product of sewage sludge composting by recycling matured compost

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.

Pilot-scale experiment was conducted on composting of sewage sludge from urban wastewater by recycling matured compost as a bulking agent. At the given ratio of sludge to matured compost = 1:2(v/v), and aeration rate 0.05m³/(m³·min), final product was gained and analyzed by measurement of nutrient (nitrogen, phosphorus, and Potassium), heavy metals, and polyacrylamide (PAM). As the experiment shown, PAM, as a kind of hazardous material in sludge, was degraded by 80.6% during composting, and only 1.17mg/g remained in the final product. Different kinds of heavy metals were concentrated after composting, and the total content of heavy metals increased by 42%~49%. Plenty of nutrients (N, P, and K) remained in the final product after composting, which was in favor of the application of final compost to plants growth.