Photocatalytical polishing of paper-mill effluents.
Photocatalytical polishing of paper-mill effluents.
复制标题
造纸厂废水的光催化抛光。
DOI：
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发表时间：
2004
影响因子：
2.7
通讯作者：
A. Vogelpohl
中科院分区：
文献类型：
--
作者：
A. Moiseev;H. Schroeder;M. Kotsaridou;S. Geissen;A. Vogelpohl
光催化氧化（PCO）是一种很有前途的生物预处理废水净化或降解难生物降解化合物的技术。因此，PCO已被研究作为生物预处理造纸厂废水净化的最后一步。已经确定了参数pH值、TiO 2改性、TiO 2浓度、催化剂重复使用、待氧化物质浓度（废水质量）的影响。经生物预处理后的废水TOC可达55 mg·L ~（-1）。该废水处理与先前提出的曝气级联光反应器，这是修改为批量实验。在优化工艺参数后，实现了高达0.76 g TOC m（-2）h（-1）的高比氧化速率以及完全的TOC矿化。彻底销毁柠檬酸盐化合物将为在生产过程中重新使用废水提供机会。短时间照射后BOD_5/TOC比值的增加表明难降解有机化合物转化为更好的生物降解中间体。使用PCO作为预处理步骤，用于增强含有柠檬酸盐或抑制性化合物的废水的生物降解性，是长期和能源密集型总污染物矿化的替代方案。
Photocatalytic oxidation (PCO) is a promising technology for purification of biological pretreated wastewater or destruction of non-biodegradable compounds. For this reason PCO has been investigated as a last step of purification of biologically pre-treated paper-mill effluents. The influence of the parameters pH, TiO2-modification, TiO2-concentration, catalyst re-use, concentration of substances to be oxidised (wastewater quality) has been determined. The TOC of the biologically pretreated wasterwater was up to 55 mg L(-1). This wastewater was treated with a previously presented aerated cascade photoreactor which was modified for batch experiments. A high specific oxidation rate of up to 0.76 g TOC m(-2) h(-1) as well as a complete TOC mineralization has been achieved after the optimisation of the process parameters. The complete destruction of recalcitrant compounds will offer the opportunity to reuse the wastewater in the production process. The increase of the BOD5/TOC ratio after a short irradiation period indicates the transformation of recalcitrant organic compounds to better biodegradable intermediates. The use of PCO as a pre-treatment step for the enhancement of the biodegradability of wastewater, containing recalcitrant or inhibitory compounds is an alternative to a long and energy-intensive total pollutant mineralization.