A dual perspective (conventional and solar-enhanced) on advanced oxidation processes for the treatment of Agave cocui vinasses

Pub Date : 2021-08-25 DOI:10.15446/rev.colomb.quim.v50n2.93101

J. Ferrer-Gutiérrez, Jovanny Angelina Santos-Luna, Jhonny Edgar Pérez-Rodríguez, J. Marcheno-Revilla, F. Cuenca-Mayorga

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Abstract

Agave cocui vinasse was physicochemically characterized with reference to the relevant environmental regulations. The following results were obtained: COD: 71,000 mg.L-1, total solids: 21,000 mg.L-1, dissolved solids: 17,000 mg.L-1; pH: 4.06, conductivity: 9.45 mhoscm-1, total Fe: 48.83 mg.L-1, total phenols: 8.66 mg.L-1; BOD: 30,000 mg.L-1. Fenton and photo-Fenton reactions were applied to treat the wastewater produced. For the Fenton process, the optimal oxidation conditions found were pH = 3.48, [COD]:[H2O2] mass ratio = 1:5, and [Fe+2]: [H2O2] mass ratio = 1:6. For the photo-Fenton process, the optimal parameters found were: pH = 3.98, [COD]:[H2O2] = 1:7.86, and [Fe+2]: [H2O2] = 1:5. The experimental data were adjusted to fit second order polynomial models with R2 = 0.88 for the Fenton process and R2 = 0.91 for the photo-Fenton process, respectively. The sludge produced featured the following characteristics: average COD: 41,000 mg.L-1, total Fe: 296,000 mg.L-1, pH: 7.7. The variables with the greatest influence in both processes were [Fe+2]:[H2O2] and [COD]:[H2O2].

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龙舌兰果醋高级氧化工艺的双重视角（传统和太阳能强化）

根据相关环境法规对龙舌兰椰汁进行了物理化学表征。得到以下结果：COD：71000 mg.L-1，总固体：21000 mg.L-1；溶解固体：17000 mg.L-1；pH：4.06，电导率：9.45 mhoscm-1，总Fe：48.83 mg.L-1，总酚类：8.66 mg.L-1；BOD:30000 mg.L-1。采用芬顿反应和光-芬顿反应对产生的废水进行处理。对于Fenton工艺，发现的最佳氧化条件为pH=3.48，[COD]：[H2O2]质量比=1:5，[Fe+2]：[HO2]质量比=1:6。对于光-芬顿工艺，发现最佳参数为：pH=3.98，[COD]:[H2O2]=1:7.86，[Fe+2]:[HiO2]=1:5。对实验数据进行了调整，以拟合二阶多项式模型，芬顿过程的R2=0.88，光芬顿过程为R2=0.91。产生的污泥具有以下特征：平均COD：41000 mg.L-1，总Fe：296000 mg.L-1；pH：7.7。在这两个过程中影响最大的变量是[Fe+2]:[H2O2]和[COD]:[HO2]。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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