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Experimental study on concentration of ammonium lactate solution from kitchen garbage fermentation broth by two-compartment electrodialysis

文献类型: 外文期刊

作者: Cheng, Guishi 1 ; Wang, Qunhui 1 ; Sun, Xiaohong 3 ; Meng, Huimin 1 ; Li, Jinhui 2 ;

作者机构: 1.Univ Sci & Technol Beijing, Dept Environm Engn, Beijing 100083, Peoples R China

2.Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Beijing Agr Biotechnol Ctr, Beijing 100089, Peoples R China

关键词: Electrodialysis;Membrane-based separation;Ammonium lactate;Kitchen garbage fermentation broth

期刊名称:SEPARATION AND PURIFICATION TECHNOLOGY ( 影响因子:7.312; 五年影响因子:6.656 )

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收录情况: SCI

摘要: In order to evaluate the performance of a two-compartment electrodialysis process used to concentrate ammonium lactate from kitchen garbage fermentation broth, we made experimental study to investigate the effect of initial dilute solution concentration (C_(di)) and flow-rate on limited current density (LCD), the effect of current density, C_(di) and operating modes on concentration of ammonium lactate, and found that LCD increases rapidly first, then increases slowly after it reaches 2.55 A/dm~2 with an increase in C_(di); LCD increases almost linearly with the flow-rate; an increase in C_(di) helps to increase the current efficiency, but causes a decrease in the recovery ratio of ammonium lactate from 85.57% to 82.66% with an increase in C_(di) from 0.35 to 0.45 mol/L at 2.5 A/dm~2; the use of constant current followed by the use of constant voltage is more effective than the use of constant current or constant voltage all the way through; ammonium lactate is concentrated from 0.10 to 0.396 mol/L with the use of constant current followed by the use of constant voltage for 6 h. The results indicated that two-compartment electrodialysis is an effective and useful process used to concentrate and purify ammonium lactate from kitchen garbage fermentation broth.

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