Pretreatment of cyanobacterial biomass for the production of biofuel in microbial fuel cells. (February 2023)

• Record Type: Journal Article
• Authors: Pandit, Soumya; Sharma, Minaxi; Banerjee, Srijoni; Kumar Nayak, Bikram; Das, Debabrata; Khilari, Santimoy; Prasad, Ram
• Is Part Of: Bioresource technology. Volume 370(2023)
• Publication Date: 2023-02
• Subjects: Anabaena -- Photobioreactor -- Pretreatment -- Bioelectricity -- Single chamber microbial fuel cells; 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.2022.128505
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Maximum algal biomass was obtained in an airlift PBR. 2 % HCl pretreatment of biomass was found effective. Pretreated biomass was used as substrate in MFC for power generation. Biomass of Anabaena sp. PCC7120 has the highest CrI value of 8.93. The highest power production potential of 6.76 Wm −3 was detected in acid pretreated biomass. Coulombic efficiency was max. at 6 gL −1 concentration of substrate. Abstract: The present study delves into phototrophic cyanobacterial biomass production by concomitant CO2 sequestration, selecting an effective pretreatment condition followed by using this as feedstock for green fuel or bioelectricity production by Microbial Fuel Cells (MFC). The performance of the various photobioreactors were put up against Anabaena sp. PCC 7120 biomass production. Maximum microalgal biomass of 1.15 gL −1 was attained in an airlift bioreactor for 9 days under a light intensity of 100 µEm −2 s −1 . Pretreatment methods like sonication, HCl acid, and H2 O2 treatment (2 % vv −1 ) were applied to digest harvested biomass. Higher power output (6.76 Wm −3 ) was attained, and 73.5 % COD was eliminated using 2 % (vv −1 ) acid pre-treated biomass. Better results were obtained using acid pre-treated biomass because the conductivity of the anolyte increased with the neutralization of acid-pre-treated biomass. The results demonstrate that cyanobacterial biomass could be employed successfully as a renewable resource for green fuel generation in MFCs.