Biodegradation of reactive red 120 in microbial fuel cell by Staphylococcus equoruma RAP2: Statistical modelling and process optimization. (April 2021)

• Record Type: Journal Article
• Authors: Shahi, Amrita; Chellam, Padmanaban Velayudhaperumal; Singh, Ram Sharan; Verma, Ankur
• Is Part Of: Journal of water process engineering. Volume 40(2021)
• Publication Date: 2021-04
• Subjects: Staphylococcus equorum -- Microbial fuel cell -- Reactive Red 120 -- Response surface methodology; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2020.101913
• Languages: English
• ISSNs: 2214-7144

Abstract

Highlights: Degradation of Reactive Red 120 by Staphylococcus equorumRAP2 driven Fuel cell. The process was statistically modeled using response surface methodology. Mechanism of degradation was proposed based on the degraded metabolites. Abstract: A laboratory-scale Microbial Fuel Cell (MFC) is used for the degradation of reactive red 120 (RR120) using bacterial strain Staphylococcus equorum RAP2 (Accession number MW36539) isolated from wastewater treatment plants capable of degrading 100 % of dye (100 ppm) in 72 h at pH 7 efficiently. The effect of pH, concentration, and time on dye degradation and electricity generation were studied using Center Composite Design (CCD) combined with Response Surface Methodology (RSM). Predicted values (R 2 0.9920) for dye degradation and (R 2 0.9428) current density was found to be high with P-value <0.05. A quadratic model was best fitted with the experiment. The optimized solutions obtained through RSM were also validated with experiments (±0.5 % error). Analytical techniques such as Fourier-transform infrared spectroscopy (FTIR), Liquid chromatography, and mass spectroscopy analysis (LCMS) were used for establishing the phenomena of biodegradation. Metabolite toxicity was also assessed by phytotoxicity.