Ultrasound Coupled with Fenton Oxidation Pre-Treatment of Sludge to Release Organic Carbon, Nitrogen and Phosphorus

Abstract:

We focused on the effects of ultrasound and Fenton reagent in ultrasonic coupling Fenton oxidation (U+F) pre-treatment processes on the disintegration of wastewater treatment plant sludge. The results demonstrated that U+F treatment could significantly increase SCOD, TOC, total N, proteins, total P and PO₄^3- concentrations in sludge supernatant. This method was more effective than ultrasonic (U) or Fenton oxidation (F) treatment alone. U+F treatment increased the SCOD by 2.1-and 1.4-fold compared with U and F alone, respectively. U+F treatment increased the total N and P by 1.7-and 2.2-fold, respectively, compared with F alone. This demonstrated that U+F treatment induces disintegration of sludge and release of organic carbon, nitrogen and phosphorus better.

• Periodical: Applied Mechanics and Materials (Volume 768)
• Pages: 506-514
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.768.506
• Online since: June 2015
• Authors: Chang Xiu Gong, Jian Guo Jiang*
• Keywords: Cooperative Effect, Element Release, Fenton Oxidation, Ultrasound, WWTP Sludge

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