用臭氧对糖蜜发酵废水进行化学氧化。

Chemical oxidation of wastewater from molasses fermentation with ozone.

作者信息

Peña M, Coca M, González G, Rioja R, García M T

机构信息

Departamento de Ingeniería Química, Universidad de Valladolid, Paseo de la Magdalena s/n, Spain.

出版信息

Chemosphere. 2003 Jun;51(9):893-900. doi: 10.1016/S0045-6535(03)00159-0.

DOI:10.1016/S0045-6535(03)00159-0

PMID:12697180

Abstract

Color removal from biologically pre-treated molasses wastewater by means of chemical oxidation with ozone has been investigated. Batch experiments have been performed in order to analyze the influence of ozone dosage and reaction time on color removal, molecular weight distribution and decolorization kinetics. Depending on the applied ozone dosage, color removal from 71% to 93% and COD reduction from 15% to 25% were reached after 30 min reaction time. TOC values remained constant throughout ozonation. Gel permeation chromatography corroborated that high molecular weight compounds, responsible for the brown color, were present in raw wastewater. UV spectral studies confirmed that these colored compounds were melanoidins. As a result of ozonation the concentration of chromophore groups decreased. Ozonation of synthetic melanoidin under the same experimental conditions provided similar color removal efficiencies. Pseudo-first order kinetics with respect to colored compounds were found.

摘要

通过臭氧化学氧化去除生物预处理糖蜜废水中颜色的研究已经展开。进行了批次实验，以分析臭氧剂量和反应时间对颜色去除、分子量分布和脱色动力学的影响。根据所施加的臭氧剂量，反应30分钟后，颜色去除率达到71%至93%，化学需氧量（COD）降低15%至25%。在整个臭氧化过程中，总有机碳（TOC）值保持不变。凝胶渗透色谱法证实，原废水中存在导致棕色的高分子量化合物。紫外光谱研究证实这些有色化合物是类黑素。臭氧化的结果是发色团浓度降低。在相同实验条件下对合成类黑素进行臭氧化可提供相似的颜色去除效率。发现了相对于有色化合物的伪一级动力学。