Supercritical Water Oxidation of Fulvic Acid as a Model Organic Compound in Landfill Leachate

Abstract:

Fulvic acid (FA) is a common refractory organic compound in landfill leachate. The degradation of FA in supercritical water oxidation (SCWO) was conducted in a SS 316 batch reactor. The effects of temperature, pressure, residence time, oxidation ratio and initial FA concentration on the degradation of FA were investigated. Results showed that FA could be easily destructed in SCWO process, and a total organic carbon (TOC) removal efficiency of 98.0% was available at 600 °C, 420 s, 25 MPa and 1% FA. Oxidation coefficient had a significant positive effect on the degradation of FA. Total carbon (TC) and TOC removal efficiencies increased from 78.9 % to 97.2 % and from 86.4 % to 97.2, respectively, when oxidation coefficient increased from 0 to 4. Benzene, phenol and naphthalene could be regarded as the intermediate products in SCWO.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 600-604
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.600
• Online since: February 2014
• Authors: Yan Meng Gong, Shu Zhong Wang*, Li Li Qian, Yan Hui Li
• Keywords: Fulvic Acid, Landfill Leachate, Supercritical Water Oxidation

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