Simultaneous energy production, boron and COD removal using a novel microbial desalination cell

Desalination ◽  
2021 ◽  
Vol 518 ◽  
pp. 115267
Author(s):  
A.Y. Goren ◽  
H.E. Okten
Keyword(s):  
Energy Production ◽  
Cod Removal ◽  
Microbial Desalination Cell

scholarly journals Carbon Nanotube/Pt Cathode Nanocomposite Electrode in Microbial Fuel Cells for Wastewater Treatment and Bioenergy Production

2021 ◽  
Vol 13 (14) ◽  
pp. 8057
Author(s):  
Mostafa Ghasemi ◽  
Mehdi Sedighi ◽  
Yie Hua Tan
Keyword(s):  
Electron Microscopy ◽  
Power Generation ◽  
Wastewater Treatment ◽  
Carbon Nanotube ◽  
Microbial Fuel Cells ◽  
Energy Production ◽  
Catalytic Properties ◽  
Internal Resistance ◽  
Cod Removal ◽  
Cathode Catalyst

In this paper, we reported the fabrication, characterization, and application of carbon nanotube (CNT)-platinum nanocomposite as a novel generation of cathode catalyst in microbial fuel cells (MFCs) for sustainable energy production and wastewater treatment. The efficiency of the carbon nanocomposites was compared by platinum (Pt), which is the most effective and common cathode catalyst. This nanocomposite is utilized to benefit from the catalytic properties of CNTs and reduce the amount of required Pt, as it is an expensive catalyst. The CNT/Pt nanocomposites were synthesized via a chemical reduction technique and the electrodes were characterized by field emission scanning electron microscopy, electronic dispersive X-Ray analysis, and transmission electron microscopy. The nanocomposites were applied as cathode catalysts in the MFC to obtain polarization curve and coulombic efficiency (CE) results. The catalytic properties of electrodes were tested by linear sweep voltammetry. The CNT/Pt at the concentration of 0.3 mg/cm2 had the highest performance in terms of CE (47.16%), internal resistance (551 Ω), COD removal (88.9%), and power generation (143 mW/m2). In contrast, for the electrode with 0.5 mg/L of Pt catalyst, CE, internal resistance, COD removal, and power generation were 19%, 810 Ω, 96%, and 84.1 mW/m2, respectively. So, it has been found that carbon nanocomposite cathode electrodes had better performance for sustainable clean energy production and COD removal by MFC.

Improving bioelectricity generation and COD removal of sewage sludge in microbial desalination cell

2017 ◽  
Vol 39 (9) ◽  
pp. 1188-1197 ◽  
Author(s):  
Atieh Ebrahimi ◽  
Daryoush Yousefi Kebria ◽  
Ghasem Najafpour Darzi
Keyword(s):  
Sewage Sludge ◽  
Cod Removal ◽  
Bioelectricity Generation ◽  
Microbial Desalination Cell

scholarly journals The Catholyte Effects on The Microbial Desalination Cell Performance of Desalination and Power Generation

2021 ◽  
Vol 27 (7) ◽  
pp. 53-65
Author(s):  
Suhad Shamil Jaroo ◽  
Ghufran Farooq Jumaah ◽  
Talib Rashid Abbas
Keyword(s):  
Power Density ◽  
Electrical Power ◽  
Power Production ◽  
Cod Removal ◽  
The Other ◽  
Air Cathode ◽  
New Approach ◽  
Efficient Type ◽  
Microbial Desalination Cell ◽  
Power Densities

A microbial desalination cell (MDC) is a new approach to bioelectrochemical systems. It provides a more sustainable way to electrical power production, saltwater desalination, and wastewater treatment at the same time. This study examined three operation modes of the MDC: chemical cathode, air cathode, and biocathode MDC, to give clear sight of this system's performance. The experimental work results for these three modes were recorded as power densities generation, saltwater desalination rates, and COD removal percentages. For the chemical cathode MDC, the power density was 96.8 mW/m2, the desalination rate was 84.08 ppm/hr, and the COD removal percentage was 95.94%. The air cathode MDC results were different; the power density was 24.2 mW/m2, the desalination rate was 86.11 ppm/hr, and the COD removal percentage was 91.38%. The biocathode MDC results were 19.91 mW/m2 as the power density, 88.9 ppm/hr as the desalination rate, and 96.94% as the COD removal percentage. The most efficient type of MDC in this study in power production was the chemical cathode MDC, but it is the lowest sustainable. On the other hand,  the biocathode MDC was the best in desalination process performance, and both the air cathode and biocathode MDC are more sustainable and environmentally friendly, especially the biocathode MDC.

scholarly journals Electricity generation, salinity, COD removal and anodic biofilm microbial community vary with different anode CODs in a microbial desalination cell for high-salinity mustard tuber wastewater treatment

RSC Advances ◽  
2019 ◽  
Vol 9 (43) ◽  
pp. 25189-25198 ◽  
Author(s):  
Zhe Liu ◽  
Ping Xiang ◽  
Zhuang Duan ◽  
Zhaohui Fu ◽  
Linfang Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Microbial Community ◽  
Electricity Generation ◽  
High Salinity ◽  
Cod Removal ◽  
Microbial Desalination Cell ◽  
Anodic Biofilm

A three-chamber microbial desalination cell (MDC) was constructed for high-salinity mustard tuber wastewater (MTWW) treatment.

scholarly journals Electricity Generation, Salt and Nitrogen Removal and Microbial Community in Aircathode Microbial Desalination Cell for Saline-Alkaline Soil-Washing Water Treatment

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2257
Author(s):  
Chenglong Xu ◽  
Jialei Lu ◽  
Zhimiao Zhao ◽  
Yinjiang Zhang ◽  
Jiawei Zhang
Keyword(s):  
Microbial Community ◽  
Osmotic Pressure ◽  
Removal Efficiency ◽  
Soil Washing ◽  
Cod Removal ◽  
Alkaline Soil ◽  
Microbial Desalination Cell ◽  
Coulomb Efficiency ◽  
Washing Water ◽  
Desalination Chamber

An aircathode microbial desalination cell (AMDC) was successfully started by inoculating anaerobic sludge into the anode of a microbial desalination cell and then used to study the effects of salinity on performance of AMDC and effect of treatment of coastal saline-alkaline soil-washing water. The results showed that the desalination cycle and rate gradually shorten, but salt removal gradually increased when the salinity was decreased, and the highest salt removal was 98.00 ± 0.12% at a salinity of 5 g/L. COD removal efficiency was increased with the extension of operation cycle and largest removal efficiency difference was not significant, but the average coulomb efficiency had significant differences under the condition of each salinity. This indicates that salinity conditions have significant influence on salt removal and coulomb efficiency under the combined action of osmotic pressure, electric field action, running time and microbial activity, etc. On the contrary, COD removal effect has no significant differences under the condition of inoculation of the same substrate in the anode chamber. The salt removal reached 99.13 ± 2.1% when the AMDC experiment ended under the condition of washing water of coastal saline-alkaline soil was inserted in the desalination chamber. Under the action of osmotic pressure, ion migration, nitrification and denitrification, NH4+-N and NO3−-N in the washing water of the desalination chamber were removed, and this indicates that the microbial desalination cell can be used to treatment the washing water of coastal saline-alkaline soil. The microbial community and function of the anode electrode biofilm and desalination chamber were analyzed through high-throughput sequencing, and the power generation characteristics, organics degradation and migration and transformation pathways of nitrogen of the aircathode microbial desalination cell were further explained.

Multi-chamber microbial desalination cell for improved organic matter and dissolved solids removal from wastewater

2014 ◽  
Vol 70 (12) ◽  
pp. 1948-1954 ◽  
Author(s):  
Harapriya Pradhan ◽  
M. M. Ghangrekar
Keyword(s):  
Organic Matter ◽  
Coulombic Efficiency ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Anaerobic Sludge ◽  
Dissolved Solids ◽  
Batch Mode ◽  
Anodic Chamber ◽  
Microbial Desalination Cell ◽  
Desalination Chamber

A five-chamber microbial desalination cell (MDC) with anode, cathode, one central desalination chamber and two concentrate chambers separated by ion exchange membranes was operated in batch mode for more than 60 days. The performance of the MDC was evaluated for chemical oxygen demand (COD) removal, total dissolved solids (TDS) removal and energy production. An average COD removal of 81 ± 2.1% was obtained using acetate-fed wastewater as substrate in the anodic chamber inoculated with mixed anaerobic sludge. TDS removals of 58, 70 and 78% were observed with salt concentration of 8, 20 and 30 g/L, respectively, in the middle desalination chamber. The MDC produced a maximum power output of 16.87 mW/m2 during polarization. The highest Coulombic efficiency of 12 ± 2.4% was observed in this system using mixed anaerobic sludge as inoculum. The system effectively demonstrated capability for simultaneous organic matter removal and desalination along with power generation.

Mitochondrial matrix calcium ions regulate energy production in myocardium: A cytochemical study

1990 ◽  
Vol 48 (2) ◽  
pp. 166-167
Author(s):  
W.A. Jacob ◽  
R. Hertsens ◽  
A. Van Bogaert ◽  
M. De Smet
Keyword(s):  
Energy Metabolism ◽  
Calcium Ions ◽  
Energy Production ◽  
Regulation Of Respiration ◽  
Free Calcium ◽  
Mitochondrial Matrix ◽  
Cytochemical Study ◽  
Nmr Techniques

In the past most studies of the control of energy metabolism focus on the role of the phosphorylation potential ATP/ADP.Pi on the regulation of respiration. Studies using NMR techniques have demonstrated that the concentrations of these compounds for oxidation phosphorylation do not change appreciably throughout the cardiac cycle and during increases in cardiac work. Hence regulation of energy production by calcium ions, present in the mitochondrial matrix, has been the object of a number of recent studies.Three exclusively intramitochondnal dehydrogenases are key enzymes for the regulation of oxidative metabolism. They are activated by calcium ions in the low micromolar range. Since, however, earlier estimates of the intramitochondnal calcium, based on equilibrium thermodynamic considerations, were in the millimolar range, a physiological correlation was not evident. The introduction of calcium-sensitive probes fura-2 and indo-1 made monitoring of free calcium during changing energy metabolism possible. These studies were performed on isolated mitochondria and extrapolation to the in vivo situation is more or less speculative.

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