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http://dx.doi.org/10.15681/KSWE.2017.33.3.334

Application of a Pilot-Scale Electrodialysis System for Groundwater Polluted with Arsenic and Manganese  

Choi, Su Young (Department of Environmental Engineering, Konkuk University)
Kwon, Min Wook (Department of Environmental Engineering, Konkuk University)
Park, Ki Young (Department of System Engineering, Konkuk University)
Cha, Ho Young (Zign and Tech)
Kim, Hee Jun (JIU CORPORATION)
Kweon, Ji Hyang (Department of Environmental Engineering, Konkuk University)
Publication Information
Journal of Korean Society on Water Environment / v.33, no.3, 2017 , pp. 334-340 More about this Journal
Abstract
A pilot-scale electrodialysis system was designed and constructed to treat groundwater polluted with arsenic and manganese. Synthetic groundwater, in which some amount of arsenic and manganese was added to make 500 mg/L of Mn and $50{\mu}g/L$ of As, was used as a feed for the ED system. The limiting current density, linear water velocity, applied voltage, and membrane surface area were investigated to obtain efficient and economic operation of the ED system. The linear water velocity was increased 0.74 cm/s to 11 cm/s based on evaluation of limiting current density. The water quality of diluate for 85 minutes of operation was satisfied with water quality criteria for drinking water using the ED system with 14 pairs of ion exchange membranes. The increased membrane pairs to 21 and 42 pairs were very effective to reduce conductivities of the diluate. The operation cost of the ED system was assessed using specific energy consumption, which was $1.065{\sim}1.2kWh/m^3$. Considering low salt concentrations of the groundwater, improvement of the ED system are required to increase current utilization and to apply low voltage while the ED system was applicable to produce drinking water.
Keywords
Arsenic; Electrodialysis; Groundwater; Ion exchange membrane; Manganese;
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Times Cited By KSCI : 2  (Citation Analysis)
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