Abstract
Municipal sludge, composed of numerous types of organic matter with a gel structure, has high water content, low permeability coefficient, and poor mechanical properties. Fenton oxidation-assisted vacuum preloading method for municipal sludge treatment was proposed. First, the municipal sludge was oxidized and treated with Fenton’s reagent; then, drainage consolidation was performed on the sludge with the vacuum preloading method. The optimal dosage of Fenton’s reagent for municipal sludge was determined. Comparative experiments of the one-dimensional consolidation of municipal sludge treated with Fenton’s reagent and the drainage consolidation by Fenton oxidation-assisted vacuum preloading were conducted. The results reveal that the specific resistance of municipal sludge decreases upon Fenton oxidation by approximately 98.6% at the optimal dosage of 22%, sludge water content decreases from 82.14 to 66.67%, volume reduces by ~ 40%, and unconfined compressive strength increases to 55 kPa.
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The research was financially supported by the National Natural Science Foundation of China (41772303) and Shanghai Natural Science Foundation, China (17ZR1410100).
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Responsible editor: Vítor Pais Vilar
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Wu, Y., Lin, Z., Kong, G. et al. Treatment of municipal sludge by Fenton oxidation combined vacuum preloading. Environ Sci Pollut Res 25, 15990–15997 (2018). https://doi.org/10.1007/s11356-018-1736-5
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DOI: https://doi.org/10.1007/s11356-018-1736-5