Deciphering biostimulation strategy of using medicinal herbs and tea extracts for bioelectricity generation in microbial fuel cells

Plant secondary metabolites induced electron flux in microbial fuel cell: investigation from laboratory-to-field scale

“…Though it was assumed that PSMs could have undergone microbial degradation 29 for this prolong operation; however deposition of tannin protein complex at bottom of the anodic chamber cannot be ruled out, thus ensuring effect for prolong duration of operation. The duration required to achieve stable OV in this case was still lower than the previous findings where gallotannic acid-toxicity on anaerobic microbes was persistent over 2 months (with neutral pH condition) 30 and a period of 2.5 years acclimation of mixed microbe against tea metabolites was required to sustain the use of tea metabolites as electron shuttle for microbes and to reach stable OV 8,17 .…”

“…Furthermore, E 1.5 -dose was applied in anolyte of pilot-scale MFC, and a significant enhancement of current production was noticed in different dosing cycles, which is ascertained to electron shuttling properties 8,17 , formation of tannin-protein complex 30 , effect on bacterial cell morphology 11 and shifting of microbial population dynamics. As the Eucalyptus-dose is composed of the mixture of several secondary metabolites, hence the effect www.nature.com/scientificreports/ on microbes and the improved electrochemical properties can be considered as the synergistic action of several metabolites.…”

Exploring community evolutionary characteristics of microbial populations with supplementation of Camellia green tea extracts in microbial fuel cells

“…Therefore, natural resources or products were recently considered to replace such artificially synthesized compounds for sustainable applications. Several studies clearly revealed that appropriate supplementation of natural products abundant in electrochemically active substances could significantly promote simultaneous bioelectricity generation and wastewater treatment in MFCs [17] , [18] , [19] , [20] . Recently, Xu et al [20] extracted natural herbal substances abundant in anthocyanins to effectively increase nearly threefold efficiency of bioelectricity generation in MFCs.…”

“…Recently, Xu et al [20] extracted natural herbal substances abundant in anthocyanins to effectively increase nearly threefold efficiency of bioelectricity generation in MFCs. From the perspective of chemical structure, in fact these bioelectricity-stimulating substances were mostly polyphenols, which are abundant in natural plants [17] , [18] , [19] , [20] .…”

Experimental and artificial intelligence for determination of stable criteria in cyclic voltammetric process of medicinal herbs for biofuel cells

“…Nevertheless, some technical methods are still required to identify fingerprints of either ES in reversible and stable nature or antioxidant of irreversible and unstable characteristics. This first‐attempt study adopted the data mentioned in Chen et al (Table in previous work) for typical cyclic voltammograms of medicinal herbs. Detailed quantitative elucidation for gradually decayed CV scan profiles to reflect such gradual attenuation of anodic and cathodic potential peaks was simulated through this novel methodology.…”