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:: Volume 20, Issue 11 (11-2018) ::
JBUMS 2018, 20(11): 49-57 Back to browse issues page
Investigation of Modified Microbial Desalination Cell performance in Sweetening of Saltwater
A Gholizadeh * , AA Neshat , F Pakravan , M Miri , M Taghavi , A Nikoonahad
Esfarayen Faculty of Medical Sciences, Esfarayen, I.R.Iran , gholizadeh_eng@yahoo.com
Abstract:   (2565 Views)
BACKGROUND AND OBJECTIVE: Regarding fresh water scarcity rake up controversies in many parts of the world, desalinating of water and wastewaters has now been taken into consideration. Microbial desalination cell (MDC) is a new technology which can desalinate water, generate electricity, and simultaneously purify wastewaters in a reactor. However, low current generation and deionization are from main challenges of this process. This study aimed to improve the MDCs efficacy.
METHODS: A modified three-cell MDC consisted of anode, cathode, and middle chambers, was designed in order to water desalination (20 g/L NaCl). Here, the cathode solution was diffused via ozone (O3-MDC) and the middle saline solution was pretreated into an ultrasonic bath. Subsequently, the results achieved in O3-MDC in terms of water desalination and current generation were compared against those of another reactor operated under oxygen diffusion (O2-MDC), and without ultrasonic pretreatment (control). Biofilm formation on anode surface and dominant bacteria in the O3-MDC reactor were studied using Scanning Electron Microscopy (SEM), and 16S rRNA gene sequencing, respectively.
FINDINGS: Saltwater pre-treatment caused to increase the electrical conductivity from 28.1 ms/cm to 35.5 ms/cm; and then current generation from 191 to 131 mV after 24 hr operation. O2-MDC and O3-MDC were able to remove 74% and 55.58% of NaCl from water, respectively. Proteobacteria, firmicuites and acidobacteria were dominant microbial communities in the anode biofilm based on 16S rRNA sequencing.
CONCLUSION: Modified MDC can be a good option for water desalination if properly navigated. Although the process is still subject to some limitations, conducting such studies can provide basics of process operationalization and commercialization.
Keywords: Microbial Desalination Cell, Microbial Fuel Cell, Bioelectric Energy Sources, Saltwater
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Type of Study: Experimental | Subject: B
Received: 2018/04/16 | Accepted: 2018/11/5 | Published: 2018/12/30
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Gholizadeh A, Neshat A, Pakravan F, Miri M, Taghavi M, Nikoonahad A. Investigation of Modified Microbial Desalination Cell performance in Sweetening of Saltwater. JBUMS. 2018; 20 (11) :49-57
URL: http://jbums.org/article-1-7769-en.html


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Volume 20, Issue 11 (11-2018) Back to browse issues page
مجله علمی دانشگاه علوم پزشکی بابل Journal of Babol University of Medical Sciences

The Journal of Babol University of Medical Sciences is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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