不同载体和操作参数对流化床芬顿法处理亚麻废水降解效果的影响。

Effect of different carriers and operating parameters on degradation of flax wastewater by fluidized-bed Fenton process.

作者信息

Chen Mengtian, Ren Hongqiang, Ding Lili, Gao Baotian

机构信息

School of Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, China and State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023 Jiangsu, China E-mail:

Suzhou Dingyu Energy-efficient Equipment Co., Ltd, Suzhou, China.

出版信息

Water Sci Technol. 2015;71(12):1760-7. doi: 10.2166/wst.2015.147.

DOI:10.2166/wst.2015.147

PMID:26067494

Abstract

This investigation evaluates the effectiveness of a fluidized-bed Fenton process in treating flax wastewater. Flax wastewater was taken from a paper-making factory in a secondary sedimentation tank effluent of a paper-making factory in Hebei. The performance of three carriers (SiO2, Al2O3, Fe2O3) used in the reactor was compared, and the effects of different operational conditions, and Fenton reagent concentrations were studied. Experimental results indicated that SiO2 was the most appropriate carrier in the system. The dose of Fe2+ and H2O2 was a significant operating factor in the degradation progress. The bed expansion was considered to be another factor influencing the treatment effect. Under the appropriate conditions (300 mg/L Fe2+, 600 mg/L H2O2, and 74.07 g/L SiO2 as the carrier, at pH=3, 50% bed expansion), the highest removal rate of total organic carbon (TOC) and color was 89% and 94%, respectively. The article also discussed the process of the colority removal of flax wastewater and the kinetics of TOC removal.

摘要

本研究评估了流化床芬顿工艺处理亚麻废水的有效性。亚麻废水取自河北一家造纸厂二次沉淀池的出水。比较了反应器中使用的三种载体（SiO₂、Al₂O₃、Fe₂O₃）的性能，并研究了不同操作条件和芬顿试剂浓度的影响。实验结果表明，SiO₂是该系统中最合适的载体。Fe²⁺和H₂O₂的投加量是降解过程中的一个重要操作因素。床层膨胀被认为是影响处理效果的另一个因素。在适宜条件下（300 mg/L Fe²⁺、600 mg/L H₂O₂、74.07 g/L SiO₂作为载体，pH = 3，床层膨胀50%），总有机碳（TOC）和色度的最高去除率分别为89%和94%。本文还讨论了亚麻废水脱色过程及TOC去除动力学。