scholarly journals Bioproduction of Hydrogen with the Assistance of Electrochemical Technology

Author(s):  
Soundarrajan Chandrasekaran ◽  
Dachamir Hotz
2019 ◽  
Vol 2 (2) ◽  
pp. 26 ◽  
Author(s):  
Bin Lai ◽  
Anh Nguyen ◽  
Jens Krömer

Industrial fermentation in aerobic processes is plagued by high costs due to gas transfer limitations and substrate oxidation to CO2. It has been a longstanding challenge to engineer an obligate aerobe organism, such as Pseudomonas putida, into an anaerobe to facilitate its industrial application. However, the progress in this field is limited, due to the poor understanding of the constraints restricting its anoxic phenotype. In this paper, we provide a methodological description of a novel cultivation technology for P. putida under anaerobic conditions, using the so-called microbial electrochemical technology within a bioelectrochemical system. By using an electrode as the terminal electron acceptor (mediated via redox chemicals), glucose catabolism could be activated without oxygen present. This (i) provides an anoxic-producing platform for sugar acid production at high yield and (ii) more importantly, enables systematic and quantitative characterizations of the phenotype of P. putida in the absence of molecular oxygen. This unique electrode-based cultivation approach offers a tool to understand and in turn engineer the anoxic phenotype of P. putida and possibly also other obligate aerobes.


2010 ◽  
Vol 159 (1-3) ◽  
pp. 53-57 ◽  
Author(s):  
José Gómez ◽  
M. Teresa Alcántara ◽  
Marta Pazos ◽  
M. Ángeles Sanromán

1994 ◽  
Vol 39 (2) ◽  
pp. 255-263 ◽  
Author(s):  
F. Croce ◽  
S. Panero ◽  
S. Passerini ◽  
B. Scrosati

2018 ◽  
Vol 18 (2) ◽  
pp. 286 ◽  
Author(s):  
Aris Mukimin ◽  
Agus Purwanto

In general, wastewater treatment by physical, chemical and biological methods are only focused on TSS, BOD and COD removals that the effluent still contains anion pollutant as NO2- and S2-. Electrochemical technology is a proper method for those pollutants treatment due to its fast process, easy operation and minimum amount of sludge. Electrocatalytic reactor with 8 L capacity using Ti/RuIrO2 cylinder as anode and Fe plate as cathode was arranged and applied to treat anion pollutants. Hydraulic retention time (30, 60, 90 and 120 min), salt concentration (250, 500 and 750 mg/L) and voltage (4, 5, and 6 V) were chosen as operation variables and NO2- and S2- concentrations as parameter indicators. Nitrite removal efficiency reached 75 and 99.7% after 60 and 120 min of electrolysis, respectively, while sulfide could obtain higher efficiency, i.e., 97 and 99.9% after 60 and 90 min, respectively, at operation variables of potential of 5 V and salt of 500 mg/L. Removal process is dominated by indirect oxidation mechanism by HClO/ClO- oxidators generated at anode surface as intermediate products. The lifespan of electrode and electric consumption are two main factors of operation cost. Electric consumed was 0.452 kWh per 1 g nitrite removed.


2018 ◽  
Vol 818 ◽  
pp. 216-222 ◽  
Author(s):  
Florymar Escalona Durán ◽  
Danyelle Medeiros de Araújo ◽  
Chrystiane do Nascimento Brito ◽  
Elisama Vieira Santos ◽  
Soliu O. Ganiyu ◽  
...  

2021 ◽  
pp. 108038
Author(s):  
Yue Yi ◽  
Axin Liang ◽  
Lin Luo ◽  
Yuxuan Zang ◽  
Hongyu Zhao ◽  
...  

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