https://scholars.lib.ntu.edu.tw/handle/123456789/576990
標題: | Development of a membrane capacitive deionization stack for domestic wastewater reclamation: A pilot-scale feasibility study | 作者: | Shen Y.-Y Sun S.-H Tsai S.-W Chen T.-H Hou C.-H. CHIA-HUNG HOU |
關鍵字: | Activated carbon treatment; Desalination; Effluent treatment; Effluents; Electrodes; Ions; Sewage treatment plants; Wastewater treatment; Water quality; Activated carbon electrode; Domestic wastewater; Domestic wastewater treatment plants; Feasibility studies; Industry applications; Membrane capacitive deionization; Removal efficiencies; Wastewater effluents; Wastewater reclamation; activated carbon; conductivity; domestic waste; feasibility study; ionization; membrane; sorption; stability analysis; wastewater treatment; water quality | 公開日期: | 2021 | 卷: | 500 | 來源出版物: | Desalination | 摘要: | This study aims to scale up a membrane capacitive deionization (MCDI) stack for the reuse of domestic wastewater for industry applications. The desalination performance of the pilot-scale MCDI was investigated for the removal of ions from the effluent of a domestic wastewater treatment plant in terms of water quality, ion selectivity, water productivity and fouling/scaling phenomena. The MCDI stack was composed of 40 pairs of 20 cm × 20 cm activated carbon electrodes and operated in a single-pass mode. The MCDI stack achieved good removal efficiency of ions from the wastewater effluent (up to 94% Ca2+ and 84% NO3?). For electrode regeneration, the pump-off operation enabled a much higher water recovery of 75%. In particular, the average conductivity after the MCDI treatment was 103 μS/cm, which meets the standard for industrial reuse. For the electrosorption selectivity of cations, Ca2+ and Mg2+ were favored due to their high charge. Among the anions, NO3? had the highest electrosorption selectivity owing to its hydration ratio. Notably, the water quality of MCDI-treated effluents remained stable during consecutive charging-discharging cycles over 5 months of operation. These results provide essential data to scale up the MCDI stack with application to water reclamation. ? 2020 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096824717&doi=10.1016%2fj.desal.2020.114851&partnerID=40&md5=84f8bded73b0e39c2ea3f6d092affcc3 https://scholars.lib.ntu.edu.tw/handle/123456789/576990 |
ISSN: | 119164 | DOI: | 10.1016/j.desal.2020.114851 |
顯示於: | 環境工程學研究所 |
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