Production and evaluation of capacitive deionization electrodes earmarked for the removal of ions from winery wastewater
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Date
2023
Authors
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Publisher
University of the Western Cape
Abstract
Membrane capacitive deionization (MCDI) is a desalination technology considered to be cost effective specifically for salt bearing solutions with concentrations below 2000 mg‧L-1, which includes general winery wastewater. To consider winery wastewater to irrigate vineyards, the water needs to be desalinated to some extent. This study aims to establish whether in-house developed electrodes could be applied in MCDI to reduce the concentration of ions contained in winery wastewater model solutions. This would allow wineries to recycle wastewater for irrigation purposes and reduce their reliance on fresh water intake, increasing the winery industry’s drought resilience. Electrode optimization was done by systematically varying electrode production parameters and targeting several specific electrode variables which influence the performance of the electrode in terms of, maximum salt adsorption capacity (mSAC), practical salt adsorption capacity (pSAC), average salt adsorption rate (ASAR), wettability, through-plane electrical conductivity and surface area and pore size distribution with diameters in the mesopore size range.
Description
>Magister Scientiae - MSc
Keywords
Capacitive deionization electrodes, Winery wastewater, Membrane capacitive deionization, Salt bearing solutions, Electrode optimization