Microbial fuel cell for simultaneous caffeine removal and bioelectricity generation under various operational conditions in the anodic and cathodic chambers

Yap, Kea-Lee; Ho, Li-Ngee; Ong, Soon‐An; Guo, Kun; Yun-Ming, Liew; Oon, Yoong-Sin; Thor, Shen-Hui; Tan, Sing-Mei; Teoh, Tean-Peng

doi:10.1016/j.eti.2021.102158

Cited by 13 publications

(6 citation statements)

References 25 publications

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“…Further immersion and rinsing of the SCG in SMFC-CRD and SMFC-CRID significantly reduced the caffeine content and improved the performance of the SMFC. The reduction of the caffeine content in SMFC-CRD and SMFC-CRID was attributed to the recalcitrant nature of caffeine, which has high-water solubility and a low octanol/water partition coefficient [ 9 ]. Therefore, SMFC-CRD and SMFC-CRID showed good performance in generating bioelectricity.…”

Section: Resultsmentioning

confidence: 99%

“…However, the hypothesis of the diffusion of caffeine from the anodic to the cathodic region could not be clearly clarified in this study and, therefore, requires a further in-depth analysis. Yap et al [ 9 ] showed that caffeine molecules can interfere with ORR activity in the cathodic region. Caffeine molecules bind to the hydroxyl groups in water [ 9 , 12 ] and thus limit the cathodic ORR in SMFC-C and SMFC-CD.…”

Section: Resultsmentioning

confidence: 99%

“…Caffeine (1,3,7-trimethylxanthine) in coffee grounds is a stable compound that can withstand high temperatures [ 8 ]. The compound remains intact because of its low ability to separate into water when being heated [ 9 ]. Therefore, the caffeine content in coffee beans remains constant regardless of the degree of roasting [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Spent Coffee Grounds for Bioelectricity Generation in Sediment Microbial Fuel Cells

Mohd Noor,

Jeong,

Yoon

et al. 2024

Microorganisms

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This study examined the utilization of spent coffee grounds with different aqueous extraction methods for the bioelectricity generation from coastal benthic sediment through a sediment microbial fuel cell (SMFC) system. Different methods for the aqueous extraction of SCGs were evaluated, including rinsing and drying of the SCG (SMFC-CRD), immersion, rinsing and drying (SMFC-CRID), drying alone (SMFC-CD), and untreated SCG (SMFC-C). The caffeine concentration in the SCG was significantly reduced using pretreatments, with SMFC-CRID achieving the lowest concentration of 0.021 ± 0.001 mg/g. SMFC-CRD contributed to the generation of the highest current density of 213.7 mA/m2 during closed-circuit operation and exhibited the highest power density of 96.9 mW/m2 in the polarization test, due to the suitable caffeine content of 0.275 ± 0.001 mg/g in the SCG. This study could provide a cost-effective method for reusing SCGs (i.e., 128 g) while generating bioelectricity as an alternative energy source. These results suggest that pretreatment with SCGs is essential for achieving optimal power density and reducing the caffeine concentration in the SMFC system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Utilization of Spent Coffee Grounds for Bioelectricity Generation in Sediment Microbial Fuel Cells

Mohd Noor,

Jeong,

Yoon

et al. 2024

Microorganisms

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“…According to the literature, in the past few years, several strategies for reducing caffeine degradation have been studied. For instance, microbial catalysis, gen bacterial cluster, UV/chlorination, − photo-Fenton, ozonation, , UV photolysis, photocataytic degradation, and semiconductor-based heterogeneous photocatalysis , were found to be effective in eliminating caffeine. It is interesting to note that in many studies, hydroxyl radicals were found to be the most important radical for the degradation of CFN .…”

Section: Resultsmentioning

confidence: 99%

Mechanochemical Degradation of Caffeine and Diclofenac Using Biochar of Fique Bagasse in the Presence of Al: Monitoring by Mass Spectrometry

Correa-Navarro,

López,

Carazzone

et al. 2023

ACS Omega

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Much research has been carried out to remove emerging contaminants using diverse materials. Furthermore, studies related to pollutant degradation have increased over the past decade. Mechanochemical degradation can successfully decompose molecules that are persistent in the environment. In this study, the biochar of fique bagasse with mixtures SiO 2 , Al, Al 2 O 3 , and Al-Al 2 O 3 was treated with a mechanochemical technique using a planetary ball mill to investigate the degradation of caffeine and diclofenac. These tests resulted in the transformation of caffeine and diclofenac due to the use of Al employing mechanochemistry. In fact, through the use of liquid chromatography coupled with mass spectrometry, eight and six subproducts were identified for caffeine and diclofenac, respectively. Additionally, analysis of the molecules proposed for caffeine and diclofenac transformation suggested hydroxylation, demethylation, decarboxylation, oxidation reactions, and cleavage of the C−C and C−N bonds in the pollutants studied. The formation of these transformation products could be possible by reductant oxygen species generated from the molecular oxygen in the presence of aluminum and the energy delivered for ball milling. The results obtained show the potential application in the environmental management of mechanochemical treatment in the elimination of emerging contaminants caffeine and diclofenac.

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“…However, only 75.8 ± 3.8% and 84.0 ± 3.4% of the COD reduction and decolorization e ciency could be obtained using 4.0 g/L of substrate loading concentration, respectively. The longer duration needed for complete degradation of the substrate may be attributed to the high COD concentration produced as a result of an increase in the organic substrate loading concentration (Yap et al 2022). Furthermore, the COD reduction and decolorization e ciency were 66.8 ± 3.3% and 74.2 ± 3.0% under 5.0 g/L of substrate loading concentration.…”

Section: Sequencing Batch Bio Lm Reactor (Sbbr)mentioning

confidence: 99%

Chemical and biological combined treatment for sugarcane vinasse: selection of parameters and performance studies

Kee

Wong

Ong

et al. 2023

Environ Sci Pollut Res

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Sugarcane vinasse has been widely reported due to the improper management that pollutes the environment. In this study, a combined coagulation and sequencing batch bio lm reactor (SBBR) seems to be a novel improvement for the treatment of sugarcane vinasse. This research focused on the optimal conditions of coagulation and SBBR and determined the abatement e ciency of sugarcane vinasse in combined sequential wastewater treatment. The coagulation process destabilizes the colloids in the aggregation and separates the supernatant by sedimentation and ltration, resulting in the maximum COD reduction (79.0 ± 3.4%) and decolorization e ciency (94.1 ± 1.9%) under the optimum conditions. Sequencing batch reactor (SBR) is a ll-and-draw activated sludge system, whereas SBBR is an integrated SBR that suspends activated sludge and connects growth processes into a biocarrier-lled system. SBBR showed great synergistic degradability, decreasing 86.6 ± 4.3% COD concentration and 94.6 ± 3.8% decolorization at 3.0 g/L of substrate loading concentration. Furthermore, kinetic studies of SBBR revealed that the rst-order kinetic model was the best tting model. The SBBR reaction was further investigated by ultraviolet-visible spectrophotometry (UV-Vis). Then, SBBR followed by the coagulation process (SBBR-CP) achieved 97.5% of COD reduction and 99.4% of decolorization, which was better than the coagulation process followed by SBBR (CP-SBBR). This nding provides new insight into developing e cient combined sequential wastewater treatments in sugarcane vinasse.

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Microbial fuel cell for simultaneous caffeine removal and bioelectricity generation under various operational conditions in the anodic and cathodic chambers

Cited by 13 publications

References 25 publications

Utilization of Spent Coffee Grounds for Bioelectricity Generation in Sediment Microbial Fuel Cells

Utilization of Spent Coffee Grounds for Bioelectricity Generation in Sediment Microbial Fuel Cells

Mechanochemical Degradation of Caffeine and Diclofenac Using Biochar of Fique Bagasse in the Presence of Al: Monitoring by Mass Spectrometry

Chemical and biological combined treatment for sugarcane vinasse: selection of parameters and performance studies

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