Regeneration and recycling of NTFC in a continuous flow

• Main Authors: Chang, Chen-Tuan, 張真端
• Other Authors: Huang, Chih-pin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/56927376858543084083

碩士 === 國立交通大學 === 環境工程系所 === 100 === Nano-zero-valent iron (nZVI) and titanium dioxide (TiO2) are commonly applied to degrade the organic pollutants in the wastewater. In our laboratory, a novel TiO2/Fe0 composite (NTFC) material has been prepared and its effective decompositions of azo-dye and nitrates have been demonstrated in batch tests. The aim of this study was to explore the feasibility of a continuous flow catalytic reactor on pollutants, focusing on the regeneration and recycling of the NTFC. The study was comprised of two parts: the optimization of the continuous flow system operation for azo-dye degradation and the evaluation of the automatic pH-programmable logic controller (pH-PLC) feedback system. The operation parameters include the dosage of NTFC, hydraulic retention time, concentration of pollutant, and the stirring rate, as well as the regeneration point of pH for automatic pH-PLC feedback system. After the completion of each continuous flow cycle, the remaining composite catalyst was collected using the magnet. The decolorization and TOC removal by the continuous system under acidic condition were satisfactory. The automatic pH-PLC feedback system by using HCl also proved that the catalyst can be regenerated, and the recycled NTFC can be reused in the continuous flow reactor for pollutants degradation.