Enhanced ammonia nitrogen removal using consistent ammonium exchange of modified zeolite and biological regeneration in a sequencing batch reactor process

被引:25
作者
Wei, Yun Xia [2 ,3 ]
Ye, Zheng Fang [1 ]
Wang, Yao Long [2 ]
Ma, Ming Guang [3 ]
Li, Yan Feng [2 ]
机构
[1] Beijing Univ, Dept Environm Engn, Inst Environm Sci & Technol, Beijing 100871, Peoples R China
[2] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Resources & Environm, Coll Chem & Chem Engn,Inst Biochem Engn & Environ, Lanzhou 730000, Peoples R China
[3] Lanzhou City Univ, Coll Chem & Environm Sci, Lanzhou, Peoples R China
关键词
natural zeolite; modification; bioregeneration; SND; SBR; ION-EXCHANGE; AQUEOUS-SOLUTION; WASTEWATERS;
D O I
10.1080/09593330.2010.536784
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Utilizing preferential ion exchange of the modified zeolite, the zeo-sequencing batch reactor (SBR) is recommended for a new nitrogen removal process. In this study, natural zeolite was modified by sodium chloride to enhance sorption capacity for ammoniacal nitrogen. The untreated and treated zeolite was characterized by XPS and XRD techniques. The sorption isotherm tests showed that equilibrium sorption data were better represented by the Langmuir model than by the Freundlich model. Treatment of natural zeolite by sodium chloride increased the sorption capacity for ammoniacal nitrogen removal from aqueous solutions. As a result of the continuous bioregeneration of ammonium saturated zeolite-floc in the SBR, the nitrogen removal efficiency of the zeo-SBR was relatively ideal. Scanning electron microscopy results showed that microbes were abundant in the zeo-SBR process.
引用
收藏
页码:1337 / 1343
页数:7
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