INDUSTRIAL WATER TREATMENT ›› 2016, Vol. 36 ›› Issue (8): 32-35. doi: 10.11894/1005-829x.2016.36(8).032

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Influences of electro-assisted microbial system operation mode on the reduction and degradation of 2,4-dichlorophenol

Zhang Jingli1,2, Li Chang1, Cheng Fang1,2, Hu Baoan3, Li Yu1,2,   

  1. 1. School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China;
    2. Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China;
    3. CCC-TDC Environmental Engineering Co., Ltd., Tianjin 300451, China
  • Received:2016-06-20 Online:2016-08-20 Published:2016-08-26

电-生物体系的运行方式对二氯酚还原降解的影响

张景丽1,2, 李畅1, 程方1,2, 胡保安3, 李毓1,2,   

  1. 1. 天津城建大学环境与市政工程学院, 天津 300384;
    2. 天津城市建设学院天津市水质科学与技术重点实验室, 天津 300384;
    3. 中交天航环保工程有限公司, 天津 300451
  • 作者简介:张景丽(1970-),副教授,硕导。电话:022-23085119,E-mail:jinglizhangczp@126.com。
  • 基金资助:

    国家自然科学基金(51078265);建设部研究开发项目(2014-K7-004)

Abstract:

2,4-dichlorophenol(2,4-DCP) having higher concentration in wastewater exists in two states:dissolved and colloidal. The reduction and degradation effects of 2,4-DCP having higher concentration treated by an intermittent electro-assisted microbial system(IEMS)and a continuous electro-assisted microbial system(CEMS) have been studied. The results show that the degradation of the dissolved 2,4-DCP treated by the CEMS conforms to the zero-order kinetic characteristics and the kinetic constants is 0.245 h-1. For 2,4-DCP degraded intermediate products 2-CP and 4-CP,the degradation are also zero-order reaction. The kinetic constants are 0.048 h-1 and 0.081 5 h-1,respectively. The hydrolysis efficiency of colloidal 2,4-DCP,while IEMS stops having electric auxiliary,is much higher than that of CEMS. The two systems are both zero-order reaction. The kinetic constants are 0.083 4 h-1 and 0.027 1 h-1,respectively.It is suitable for 2,4-DCP having higher concentration to be treated by IEMS.

Key words: continuous electro-assisted microbial system, intermittent electro-assisted microbial system, 2,4-dichlorophenol

摘要:

废水中较高浓度的2,4-二氯酚(2,4-DCP)以溶解态和胶体2种形态存在。研究了间歇式电辅助微生物体系(IEMS)和连续式电辅助微生物体系(CEMS)对较高浓度2,4-DCP的还原降解效果。结果表明CEMS对溶解性2,4-DCP的降解符合零级反应动力学特征,动力学常数为0.245 h-1,对2,4-DCP降解中间产物邻氯酚(2-CP)和对氯酚(4-CP)的降解也为零级反应,动力学常数分别为0.048、0.0815 h-1。IEMS在停止电辅助期间对胶体态2,4-DCP的水解效率远高于CEMS,2个体系均为零级反应,动力学常数分别为0.0834、0.0271 h-1。较高浓度的2,4-DCP宜采用IEMS处理。

关键词: 连续式电辅助微生物体系, 间歇式电辅助微生物体系, 2,4-二氯酚

CLC Number: