Electrochemical Removal of Sodium Ion from Fermented Food Composts

Kitae Baek; Hyun-Ho Lee; Hyun-Jae Shin; Ji-Won Yang

Korean Journal of Chemical Engineering, Vol.17, No.2, 245-247, March, 2000

DOI10.1007/BF02707151 Export Citation

Electrochemical Removal of Sodium Ion from Fermented Food Composts

Kitae Baek, Hyun-Ho Lee, Hyun-Jae Shin¹, and Ji-Won Yang^†

Department of Chemical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon 305-701, Korea
¹Bioprocess Technology Research Division, Korea Research Institute of Bioscience and Biotechnology (KRIBB), P.O. Box 115, Yusong, Taejon, Korea

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Fermented food composts, to be recycled into fertilizer and animal feed, require sodium chloride concentrations to be less than 1 wt% due to several toxicities. Electrochemical methods are used to remove sodium ions from fermented food composts. By washing the compost with tap water (with no electric current applied), 48% of the initial sodium ion is removed. With an electric current density of 3 mA/㎠ (the distance between the electrodes is 16cm), the removal efficiency increases to 96% for a 36 h operation. Major factors influencing the efficiency are the treatment time and the electric current density. Removal efficiency increases with energy demand to yield 96% removal at 60 Kwh/㎥. Due to the difference in relative ionic mobility, less than 9% of calcium is removed, during the same operation time, which supports the feasibility of this method.

Keywords:Electrochemical Removal;Foodwastes;Composts;Desalting;Sodium Chloride

[References]

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[Referenced By]

[Related Articles]

[1] Acar YB, J. Geotech. Geoenviron. Eng., 122, 173 (1996)

[2] Eaton AD, "Standard Methods for the Examination of Water and Wastewater," 19(th) ed., p. 3-3~3-15, American Pubican Publiccation Health Association, Maryland, USA (1995)

[3] Hansen HK, J. Chem. Technol. Biotechnol., 70, 67 (1997)

[4] Hicks RE, Environ. Sci. Technol., 28, 2203 (1994)

[5] Kim NC, J. Korea Org. Waste Recycling Council, 2, 51 (1994)

[6] Lechno S, J. Plant Physiol., 150, 206 (1997)

[7] Martinez V, Planta, 190, 519 (1993)

[8] Pamukcu S, Environ. Prog., 11, 241 (1992)

[9] Trueman KF, Aust. Vet. J., 54, 89 (1978)