Abstract
The pretreatment of refractory polyvinyl-alcohol (PVA) wastewater with low value of CODCr by Fenton’s reagent was investigated to enhance the biodegradability. The effects of operating conditions such as pH of the solution, Fe2+ dosage, H2O2 dosage, reaction time and initial PVA concentration on the removal efficiency of CODCr were discussed. It is demonstrated that the optimum value of pH for removal of CODCr is 5 and the most suitable dosages of H2O2 (2%) and FeSO4 (10 mg/L) are 5% and 8.0%, respectively. When the initial CODCr value of the PVA water is 760 mg/L, the favorable reaction time is 110 min. Under these optimum conditions, the removal ratio of CODCr is 58.6%–61.4%, and the value of biodegradability (CODB/CODCr) increases markedly from 8.9%–9.7% to 62.6%–68.3%.
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Foundation item: Project(08JCYBJC02600) supported by the Natural Science Foundation of Tianjin, China; Project(2008ZX07314-005-011) supported by the National Major Technological Program of China
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Xiao, Yt., Xu, Ss. & Li, Zh. Degradation of polyvinyl-alcohol wastewater by Fenton’s reagent: Condition optimization and enhanced biodegradability. J. Cent. South Univ. Technol. 18, 96–100 (2011). https://doi.org/10.1007/s11771-011-0665-y
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DOI: https://doi.org/10.1007/s11771-011-0665-y