Anolyte acidification is an inevitable restriction for the bioelectricity generation of buffer-free microbial fuel cells (MFCs). In this work, acidification of the buffer-free KCl anolyte has been thoroughly eliminated through anolyte recycling. The accumulated HCO concentration in the recycled KCl anolyte was above 50mM, which played as natural buffer and elevated the anolyte pH to above 8. The maximum power density (P) increased from 322.9mWm to 527.2mWm, which is comparable with the phosphate buffered MFC. Besides Geobacter genus, the gradually increased anolyte pH and conductivity induced the growing of electrochemically active Geoalkalibacter genus, in the anode biofilm. Anolyte recycling is a feasible strategy to strengthen the self-buffering capacity of buffer-free MFCs, thoroughly eliminate the anolyte acidification and prominently enhance the electric power.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2017.08.073 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Influence of Water Hardness and Complexing Agents on Electrochemical Hydrogen Peroxide Generation.
ChemSusChem
October 2024
Institute of Chemical and Electrochemical Process Engineering, Clausthal University of Technology, Leibnizstraße 17, 38678, Clausthal-Zellerfeld, Germany.
Recently, many studies have been published regarding electrochemical oxygen reduction reaction for generating hydrogen peroxide (HO) using gas diffusion electrodes (GDEs) for various applications. Sodium salts solved in deionized water were usually used as supporting electrolytes. In technical applications, however, tap water-based electrolytes with hardeners are particularly relevant and have only been considered in a few studies to date.
View Article and Find Full Text PDFIron slag/activated carbon-electrokinetic system with anolyte recycling for single and mixture heavy metals remediation.
Sci Total Environ
June 2024
Department of Civil and Environmental Engineering, College of Engineering, Qatar University, PO Box 2713, Doha, Qatar.
The electrokinetic process has been proposed for in-situ soil remediation to minimize excavation work and exposure to hazardous materials. The precipitation of heavy metals in alkaline pH near the cathode is still challenging. Reactive filter media and enhancement agents have been used in electrokinetics to enhance the removal of heavy metals.
View Article and Find Full Text PDFInsight into the electrochemical process of EDTA-assisted soil washing effluent under alternating current.
J Hazard Mater
May 2024
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China. Electronic address:
EDTA has been widely utilized as a chelating agent in soil heavy metal remediation, due to its strong coordination capability. Electrochemical deposition is a promising avenue to treat soil washing effluent. However, the impact of advanced electrochemical techniques on EDTA remains incompletely understood.
View Article and Find Full Text PDFMembrane-Assisted Electrochlorination for Zero-Chemical-Input Point-of-Use Drinking Water Disinfection.
ACS ES T Eng
October 2022
Department of Civil & Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
Due to the challenges of providing centralized drinking water infrastructure in low-income and rural settings, point-of-use (POU) disinfection systems are an attractive option for enhancing access to safe drinking water. Electrochlorinators offer an easily scalable and adaptable alternative to POU disinfection systems that require frequent replenishment and accurate dosing of chlorine, but they also require addition of salts on a regular basis. To address this need, we developed an electrochemical disinfection system that efficiently produces chlorine without any chemical inputs.
View Article and Find Full Text PDFThe closed-loop recycling strategy of Li and Co metal ions based on aqueous Zn-air desalination battery.
J Colloid Interface Sci
July 2023
Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, School of Electronics and Information Engineering, South China Normal University, Foshan 528225, China; SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan 511517, China. Electronic address:
Nowadays, it is a global problem to recycle LiCoO from waste lithium-ion batteries (LIBs) due to the deficiency of high business cost and environmental pollution. Here, a novel three-channel ion recovery device based on a Zn-air desalination battery (ZADB) is proposed which can supply energy while separating Li and Co from the recovered solution. The three-channel ZADB device consists of a Zn foil anode chamber with ZnSO anolyte stream, an intermediate chamber with Li and Co recovered stream and an air cathode chamber with LiOH and Co(OH) catholyte stream, chambers are separated by anion exchange membrane (AEM) and cation exchange membrane (CEM) respectively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!