Abstract：
:The microbial fuel cell (MFC) is an emerging technology, which uses exoelectrogenic microorganisms to oxidize organic matter in the wastewater to produce electricity. However, the low energy output limits its application in practice. Capacitive deionization (CDI), an electrochemically controlled method for deionization by the adsorption of ions in the electrical double layer region at an electrode-solution interface, requires a low external power supply. Therefore, in this study, we investigated the MFC driven CDI (MFC-CDI) technology to integrate deionization with wastewater treatment and electricity production. Taking advantage of the low potential requirement of CDI, voltage generated from a continuous flow MFC could be used to drive the CDI to achieve removal of the electrolyte to a stable status. The results indicated that among the three connection types of MFCs including single-, series-, and parallel-configuration, the parallel connection of two MFCs resulted in the highest potential (0.63V) applied to CDI and the conductivity removal of NaCl solution was more than 60%. The electrosorption capacities under different electrolyte concentrations of 50, 100 and 150 mg L(-1) were 150, 346 and 295 μg g(-1), respectively. These results suggest that the new MFC-CDI technology, which utilizes energy recovery from the wastewater, has great potential to be an energy saving technology to remove low level dissolved ions from aqueous solutions for the water and wastewater treatment processes.
journal_name
Chemospherejournal_title
Chemosphereauthors
Feng C,Hou CH,Chen S,Yu CPdoi
10.1016/j.chemosphere.2012.12.068subject
Has Abstractpub_date
2013-04-01 00:00:00pages
623-8issue
5eissn
0045-6535issn
1879-1298pii
S0045-6535(13)00028-3journal_volume
91pub_type
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