Co-substrates' influence on bioelectricity production in an azo dye-based microbial fuel cell. (June 2022)

• Record Type: Journal Article
• Authors: Ravinuthala, Srinithya; Nair, Anjitha V.; Sharma, Neha; Lokesh, S.; Madhusudhan, M.C.; Das, Saprativ P.
• Is Part Of: Bioresource technology reports. Volume 18(2022)
• Publication Date: 2022-06
• Subjects: Microbial fuel cell (MFC) -- Bioelectricity -- Azo dye -- Hydraulic retention time (HRT) -- Congo red -- Co-substrates; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2022.101012
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: Co-substrates have been known to influence bioelectricity output during dye degradation. This preliminary research is focused on understanding the variations of bioelectricity output when co-substrates glucose and nitrogen sources were added along with Congo red azo dye in a double-chambered microbial fuel cell (MFC). A novel bacterial consortium capable of azo dye degradation was added as the inoculant to the double-chambered MFC. Differences in bioelectricity output were noted when glucose alone, ammonium nitrate and ammonium phosphate alone were added as co-substrates with Congo red dye. MFC with 25 mg L −1 ammonium nitrate peaked 0.032V and 0.003A open circuit (OC) output after 8 h hydraulic retention time (HRT). This was followed by observing effects of glucose alone and glucose combined with nitrogen sources over 8 h. Peak voltage and current of 0.11V and 0.012A, respectively were achieved at 3 h HRT by experimental model with glucose alone as co-substrate. Graphical abstract: Unlabelled Image Highlights: Low-cost double-chambered MFCs for treating Congo red dye water were constructed. Novel bacterial consortium as inoculant was deployed for azo dye degradation. An inorganic NH4 NO3 co-substrate yielded 0.032 V and 0.003A output post 8 h HRT. An utmost 0.11 V and 0.012A at 3 h HRT was attained with co-substrate glucose.