Treatment of Petrochemical Treatment Plant Secondary Effluent by Fenton Oxidation

• Published in: Huanjing kexue Vol. 36; no. 7; p. 2597
• Main Authors: Wang, Yi, Wu, Chang-yong, Zhou, Yue-xi, Zhang, Xue, Dong, Bo, Chen, Xue-min
• Format: Journal Article
• Language: Chinese
• Published: China 01.07.2015
• Subjects: Environmental Restoration and Remediation; Extraction and Processing Industry; Fluorescence; Gas Chromatography-Mass Spectrometry; Hydrogen Peroxide; Industrial Waste; Iron; Molecular Weight; Oxidation-Reduction; Phenols - isolation & purification; Phosphorus - isolation & purification; Waste Disposal, Fluid - methods; Waste Water - chemistry; Water Pollutants, Chemical - chemistry
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.2015.07.036

Fenton oxidation was applied to treat the petrochemical treatment plant secondary effluent by the continuous flow configuration. The effect of Fenton agent dosage on the COD and phosphorus removal and the variation of the dissolved organic matter characteristics during the treatment process were investigated. The results showed the average COD and PO(4)3- -P concentrations were 64.8 mg.L-1 and 0. 79 mg.L-1, respectively. When the dosage of H2O (30%), FeSO4.7H2O and PAM were 0. 4 mL.L-1, 0. 8 mg.L-1 and 0. 9 mg.L-1 and the residence time was 30 min, the average removal rate of COD and PO(4)3- -P were 24. 3% and 95. 5% respectively. The effluent COD was lower than 50 mg.L-1. The percentage of dissolved organic matters with molecular weight less than 1 x 10(3) was 80. 4% in the raw wastewater, however, the percentage increased to 95. 6% when treated by Fenton oxidation. Three-dimensional fluorescence analysis showed that the Fenton oxidation can effectively remove protein and phenols. GC-MS results showed that t