TY - JOUR
T1 - Towards upscaling microbial desalination cell technology
T2 - A comprehensive review on current challenges and future prospects
AU - Rahman, Sadik
AU - Jafary, Tahereh
AU - Al-Mamun, Abdullah
AU - Baawain, Mahad Said
AU - Choudhury, Mahbuboor Rahman
AU - Alhaimali, Halimah
AU - Siddiqi, Sajjad Ahmad
AU - Dhar, Bipro Ranjan
AU - Sana, Ahmad
AU - Lam, Su Shiung
AU - Aghbashlo, Mortaza
AU - Tabatabaei, Meisam
N1 - Funding Information:
The authors wish to extend their sincere appreciations to the Sultan Qaboos University (SQU) , Muscat, Oman, for the financial support through His Majesty’s Trust Fund ( SR / ENG /CAED/17/01). We are also thankful to the Research Council Fund for the financial support (RC/RG/ ENG /CAED/19/01) collaborated with Manhattan College, Riverdale, New York, USA and the University of Alberta , Edmonton, Canada.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3/15
Y1 - 2021/3/15
N2 - Shortage of potable water is the driving force behind desalination practices mainly performed by conventional thermal and membrane-based technologies. However, conventional desalination technologies are unsustainable due to their high energy requirements. This highlights the necessity of developing more sustainable and eco-friendly alternatives. As an emerging technology, microbial desalination cell (MDC) has attracted a great deal of attention due to its ability to desalinate seawater, treat wastewater, and recover electricity and value-added products in a single reactor. The technology produces electricity through the biodegradation of organics present in wastewater. The recovered electricity derives the migration of ions, and is subsequently collected as value-added product. The present review summarizes the prospects of MDC as (i) a sustainable green desalination technology, (ii) a cost-effective approach for simultaneous wastewater treatment and recovery of value-added products (i.e., HCl, NaOH, H2O2, H2, humic and fulvic acid), and (iii) an electrochemical process for + removal of targeted pollutants (i.e., NH4+-N, Cu, Cr, Pb, Ni, As). Despite the favorable environmental and economic attributes of MDCs, large-scale application of those technology is limited due to a number of engineering and operational challenges. Therefore, this review carefully summarizes all the challenges associated with engineering parameters (i.e., reactor design, internal resistance, cost-effectiveness of electrodes and membranes, membrane fouling), and operating factors (i.e., pH imbalance due to ion migration, low ion transport rate, growth and adhesion of electroactive biofilms, and biofilm inhibition). The interrelationships between the engineering/operational challenges and MDC performances are also concisely explained. Finally, research needs to scale up MDCs for simultaneous desalination, wastewater treatment, and energy-resource recovery are proposed.
AB - Shortage of potable water is the driving force behind desalination practices mainly performed by conventional thermal and membrane-based technologies. However, conventional desalination technologies are unsustainable due to their high energy requirements. This highlights the necessity of developing more sustainable and eco-friendly alternatives. As an emerging technology, microbial desalination cell (MDC) has attracted a great deal of attention due to its ability to desalinate seawater, treat wastewater, and recover electricity and value-added products in a single reactor. The technology produces electricity through the biodegradation of organics present in wastewater. The recovered electricity derives the migration of ions, and is subsequently collected as value-added product. The present review summarizes the prospects of MDC as (i) a sustainable green desalination technology, (ii) a cost-effective approach for simultaneous wastewater treatment and recovery of value-added products (i.e., HCl, NaOH, H2O2, H2, humic and fulvic acid), and (iii) an electrochemical process for + removal of targeted pollutants (i.e., NH4+-N, Cu, Cr, Pb, Ni, As). Despite the favorable environmental and economic attributes of MDCs, large-scale application of those technology is limited due to a number of engineering and operational challenges. Therefore, this review carefully summarizes all the challenges associated with engineering parameters (i.e., reactor design, internal resistance, cost-effectiveness of electrodes and membranes, membrane fouling), and operating factors (i.e., pH imbalance due to ion migration, low ion transport rate, growth and adhesion of electroactive biofilms, and biofilm inhibition). The interrelationships between the engineering/operational challenges and MDC performances are also concisely explained. Finally, research needs to scale up MDCs for simultaneous desalination, wastewater treatment, and energy-resource recovery are proposed.
KW - Energy recovery
KW - Microbial electrochemical desalination
KW - Upscaling challenges
KW - Value-added products
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85098164939&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85098164939&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/ce5b7787-41ea-3d2a-b2e4-9130bbddafe9/
U2 - 10.1016/j.jclepro.2020.125597
DO - 10.1016/j.jclepro.2020.125597
M3 - Review article
AN - SCOPUS:85098164939
SN - 0959-6526
VL - 288
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 125597
ER -
