Bioremediation of Congo red in an anaerobic moving bed bioreactor: Process optimization and kinetic modeling. (December 2021)

• Record Type: Journal Article
• Authors: Maurya, Kanhaiya Lal; Swain, Ganesh; Sonwani, Ravi Kumar; Verma, Ankur; Singh, Ram Sharan
• Is Part Of: Bioresource technology reports. Volume 16(2021)
• Publication Date: 2021-12
• Subjects: Congo red dye -- Polyurethane foam - polypropylene -- Lysinibacillus fusiformis -- Response surface methodology; 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.2021.100843
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: The Lysinibacillus fusiformis immobilized polyurethane foam–polypropylene bio carrier was used as support media in an anaerobic moving bed bioreactor to evaluate the biodegradation of Congo red (CR) dye. The process variables like CR dye concentration (20–100 mg/L), bio carrier filling ratio (BFR) (20–70%), and agitation speed (40–100 RPM) were optimized using response surface methodology and obtained to be 60 mg/L, 45%, and 70 RPM, respectively. Moreover, the AnMBBR was continuously operated at optimized conditions for 120 days by varying the feed flow rate in the range of 10 to 60 mL/min. The maximum elimination capacity and removal efficiency were found as 21.0 mg/L. d and 87.33%, respectively. The high regression coefficient ( R 2 = 0.99) shows the efficacy of the modified Stover–Kincannon (MSK) model to predict the experimental value accurately. The kinetic parameters were evaluated to be: U max : 0.21 g/L. d, K B : 0.23 g/L. d. Graphical abstract: Unlabelled Image Highlights: Process variables were optimized using response surface methodology. PUF-PP immobilized Lysinibacillus sp. was used as moving carriers in the AnMBBR. RE and EC of CR dye optimum conditions were found to be 87.33% and 21.0 mg/L.d, respectively. Modified Stover-Kincannon model was applied to evaluate the biodegradation kinetics.