Advanced Treatment on Papermaking Wastewater Using Photo-Fenton Modified Fly Ash

Abstract:

There are still some recalcitrant and toxic substances contained in the papermaking wastewater after the biological treatment, so it is necessary to conduct advanced treatment. This paper designed the types and modified methods of fly ash, and then utilized the orthogonal test and single factor analysis to determine the influence of various factors and the combination of optimal levels of Photo-Fenton method of modified fly ash. The results show that the acid modified fly ash has great synergistic catalytic effect. The optimal reaction conditions of papermaking wastewater treatment using the method without adjusting the pH value of raw water are shown as follows: the dosage of fly ash is 34g/L, the dosage of H₂O₂ is 8.2mmol/L, the dosage of FeSO₄·7H₂O is 8.8mmol/L and the reaction time is controlled in 45min.In this case, the removal efficiency for COD can reach 71.72%.

• Periodical: Applied Mechanics and Materials (Volume 535)
• Pages: 230-236
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.535.230
• Online since: February 2014
• Authors: Xiao Feng Jia, Wen Ning Mai, Xiao Rui Wang, Jun Zhou
• Keywords: Advanced Treatment, Modified Fly Ash, Papermaking Wastewater, Photo-Fenton

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