Nava J L, Recéndiz A, Acosta J C, González I
Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, México DF, México.
Water Sci Technol. 2008;58(12):2413-9. doi: 10.2166/wst.2008.558.
This work shows results obtained in the electrochemical incineration of a synthetic vinasse with initial chemical oxygen demand (COD) of 75.096 g L(-1) in aqueous media (which resembles vinasse industrial wastewater). Electrolyses in a filter-press-type FM01-LC electrochemical reactor equipped with a three-dimensional (3D) boron doped diamond electrode (BDD) were performed at Reynolds values between 22 <or= Re <or= 109, and a fixed current density of 10 mA cm(-2). The electrochemical incineration achieved up to 97% in vinasse mineralization with current efficiencies that surpass unity and energy consumption of 168 KW-h m(-3), at Re =109. The mineralization of vinasse indicates that such degradation occurs via hydroxyl radicals formed by the oxidation of water on the BDD surface. Experimental data revealed that hydrodynamic conditions slightly influence the vinasse degradation rate and current efficiency, indicating that the oxidation involves a complex pathway.
这项工作展示了在水介质中（类似于酒糟工业废水）对初始化学需氧量（COD）为75.096 g L⁻¹的合成酒糟进行电化学焚烧所获得的结果。在配备三维（3D）硼掺杂金刚石电极（BDD）的压滤式FM01-LC电化学反应器中进行电解，雷诺数在22 ≤ Re ≤ 109之间，固定电流密度为10 mA cm⁻²。在Re = 109时，电化学焚烧实现了高达97%的酒糟矿化，电流效率超过100%，能耗为168 KW-h m⁻³。酒糟的矿化表明这种降解是通过BDD表面水氧化形成的羟基自由基发生的。实验数据表明，流体动力学条件对酒糟降解速率和电流效率的影响较小，这表明氧化过程涉及复杂的途径。
