Effectiveness of piggery waste treatment using microbial fuel cells coupled with elutriated-phased acid fermentation. (November 2017)

• Record Type: Journal Article
• Authors: Chandrasekhar, K.; Ahn, Young-Ho
• Is Part Of: Bioresource technology. Volume 244:Part 1(2017)
• Page Start: 650
• Page End: 657
• Publication Date: 2017-11
• Subjects: Acid elutriation effluents -- Prefermentation -- Piggery waste -- Electricity generation -- Waste remediation; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.08.021
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: MFCs coupled with acid elutriation fermenter for enhanced bioelectricity generation. Piggery waste-fed acid elutriation fermenter generated more organic acids at pH 9. The power generation was improved with acid elutriation fermenter effluents. The maximum power density achieved is 1553 mW/m 2 in AEE-fed MFCs. Process configuration for both waste treatment and continuous bioelectrogenesis. Abstract: The present study evaluates the feasibility of increased power generation in microbial fuel cells (MFCs) coupled with acid elutriation fermentation. Raw piggery waste (RPW) and acid elutriation effluents (AEE) of piggery waste were used to generate bioelectricity in single-chambered air–cathode MFCs. RPW-fed MFCs exhibited stable performance after 12-days of operation, generating 540 mV of open circuit voltage (OCV). RPW fed-MFCs displayed peak potential and maximal power density (PDmax ) of 0.364 V and 192 mW/m 2 with 980 Ω external resistance (Rext ), respectively. AEE-fed MFCs documented 818 mV of maximum OCV. Furthermore, the peak potential and PDmax of 0.329 V and 1553 mW/m 2 were generated with 100 Ω Rext, respectively. RPW and AEE-fed MFCs exhibited 84% and 93% substrate removal efficiency, respectively. These findings suggest that a two-stage process including acid elutriation reactor as a pre-fermentation and MFCs greatly enhances substrate removal and electricity generation from piggery waste.