Bioelectrochemical hydrogen production with cheese whey as sole substrate

Rago, Laura; Baeza, Juán Antonio; Guisasola, Albert

doi:10.1002/jctb.4987

Cited by 24 publications

(13 citation statements)

References 39 publications

(66 reference statements)

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“…The coulombic efficiency was 49±8% in the MFC system. In the MEC, hydrogen production reached 0.8 L H2 /L REACTOR /d and it proved the potentiality of cheese whey to be a good carbon source for bioenergy production [161].…”

Section: Food Additivesmentioning

confidence: 83%

Waste Degradation and Utilization by Lactic Acid Bacteria: Use of Lactic Acid Bacteria in Production of Food Additives, Bioenergy and Biogas

Новик¹,

Meerovskaya²,

Savich³

2017

Food Additives

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Lactic acid bacteria (LAB) are one of the most well-studied bacterial groups known from ancient times. These valuable microorganisms are used in numerous areas, especially food industry and medicine. LAB produce a wide range of compounds for food upgrading. Moreover, LAB can find special applications like generation of bioenergy not affecting the surrounding environment. The article considers physiological and biochemical processes determining valuable characteristics of the bacteria, potential applications of LAB and their products, especially in food industry and bioenergy sector, and discusses LAB potential contribution into solution of waste disposal problem.

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Section: Food Additivesmentioning

confidence: 83%

Waste Degradation and Utilization by Lactic Acid Bacteria: Use of Lactic Acid Bacteria in Production of Food Additives, Bioenergy and Biogas

Новик¹,

Meerovskaya²,

Savich³

2017

Food Additives

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“…This effect has been estimated to be +0.04 % on average (calculation details were in SI 3). The arbitrary value of 1 mA cm −2 was chosen, based on data from previous material study, as the average maximum current density achievable with 10 mM acetate under ideal conditions.

true R P I = \sqrt{\begin{matrix} {(\frac{j_{m a x}}{1 m A c m^{- 2}})}^{2} + {(1 - \frac{t_{j_{m a x}}}{t_{t o t a l}})}^{2} \\ + {(\frac{C E}{100 %})}^{2} + {(\frac{R E}{100 %})}^{2} \end{matrix}}; 0 \leq R P I

…”

Section: Methodsmentioning

confidence: 99%

“…This effect has been estimated to be + 0.04 % on average (calculation details were in SI 3). The arbitrary value of 1 mA cm À 2 was chosen, based on data from previous material study, [23] as the average maximum current density achievable with 10 mM acetate under ideal conditions. RPI ¼ ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi ffi Once a sequence was completed, all biofilms were harvested from each anode by carefully scraping them off and stored individually.…”

Section: Selection Of "Best" Inoculummentioning

confidence: 99%

Investigating Community Dynamics and Performance During Microbial Electrochemical Degradation of Whey

et al. 2020

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Whey is a main by‐product of the dairy industry and is difficult to valorise for small and medium enterprises. Microbial electrochemical technologies could be the key for these enterprises to exploit this current waste product. Whey removal and conversion to electrical current was investigated at microbial anodes using potentiostatically controlled half‐cell experiments. The anodes were fed with a whey solution containing ca. 1 g L−1 COD. This can be reliably cleaned with average removal efficiencies of 65.8±10.9 %. The removal coincided with maximum current densities of 0.31±0.06 mA cm−2 and Coulomb efficiencies of 37.1±10.8 %. The anodes are based on a robust complex microbial community. This was established in bioelectrochemical reactors by end of four batch cycles showing an efficient niche differentiation from the following successive enrichments. The microbial analysis revealed a division of labour with mainly planktonic microorganisms degrading the complex whey components by fermentation to organic acids, part of which are subsequently used by the electroactive bacteria at the anode. The results show the need for deciphering microbial structure‐function relationships for future process steering as well as engineering approaches.

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“…1 For example, reduction of hexavalent chromium, 2 ammonia recovery, 3 remediation of xenobiotics, 4 remediation of toxic metal contaminated soil, 5 sulfate reduction 6 or polishing effluents of anaerobic digesters 7 are some of the applications reported recently for BES. Moreover, the generation of different products such as electricity, 8 hydrogen, [9][10][11] methane, 12,13 biofuels, desalinated water 14 or high-value chemical products already has been reported. BES also have been proposed as an alternative for posttreatment of conventional wastewater treatment and specifically suited to low strength wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Repeatability of low scan rate cyclic voltammetry in bioelectrochemical systems and effects on their performance

Ruiz

Baeza

Montpart

et al. 2020

J of Chemical Tech & Biotech

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Background Cyclic voltammetry (CV) has become a standard tool in the study of bioelectrochemical systems (BES) because it is a nondestructive technique that provides useful information on the electron transfer capacity of these systems. When applied to the large‐surface electrodes typically found in BES, the scan rate must be severely diminished or otherwise the capacitive current masks the faradaic current. Decreasing the scan rate results in an increase in the duration of the experiments, which can lead to a significant alteration of the initial system conditions. Results The repeatability of low scan rate cyclic voltammetry (LSCV) in air cathode microbial fuel cells (AC‐MFCs) operating in batch mode was examined. Consecutive LSCVs at 0.1 mV s−1 were recorded with and without prior renewal of the culture medium. Significant deviations in CV replicates were observed when the medium was not replaced (as high as 40% of maximum intensity). These deviations decreased (<18%) when the medium was refreshed, indicating that significant changes in the culture medium composition occurred during LSCVs. Additional electrochemical tests showed that the peak in the forward scan was probably the result of an accumulation of charge in the anodic system. Conclusion LSCV can affect the response of AC‐MFCs working in batch mode and cast doubt on the repeatability of these experiments, observing differences as high as 40% in maximum intensity. Renewing the culture medium is recommended to improve the repeatability of LSCV replicates. © 2020 Society of Chemical Industry

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Bioelectrochemical hydrogen production with cheese whey as sole substrate

Cited by 24 publications

References 39 publications

Waste Degradation and Utilization by Lactic Acid Bacteria: Use of Lactic Acid Bacteria in Production of Food Additives, Bioenergy and Biogas

Waste Degradation and Utilization by Lactic Acid Bacteria: Use of Lactic Acid Bacteria in Production of Food Additives, Bioenergy and Biogas

Investigating Community Dynamics and Performance During Microbial Electrochemical Degradation of Whey

Repeatability of low scan rate cyclic voltammetry in bioelectrochemical systems and effects on their performance

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