Phenol Biodegradation Kinetics in an Anaerobic Batch Reactor

Abstract

Biodegradation of phenol with mixed consortia of bacterial was studied in an anaerobic batch reactor. The culture was acclimatized for a period of two months to grow in mineral salt medium contained phenol as the sole carbon source. Minimum and maximum concentrations of 50 and 1000 mg/l of phenol in the medium were used for the purpose of culture adaptation. The goals of these experiments were to determine the kinetics of biodegradation by determination of biomass growth rates and phenol concentrations with respect to incubation time. Substrate inhibition kinetics and specific growth rate were defined while data were fitted in Haldane model. The specific growth rate, half-saturation and inhibition coefficients for Haldane model were 0.067 hG , 25.32 and 200 mg/l, respectively. The biokinetic parameters were used to predict the biodegradation 1 profile, which was quite consistent with the obtained experimental data. The results were useful for the estimation of relations between growth rate and substrate utilization, which may be used to evaluate mass balance for a wastewater treatment plant contained phenol compound.

Conductive materials stimulated direct interspecies electron transfer and application in anaerobic digestion

“…As phenol is toxic, the unrecovered activity could be attributed to its inhibition. This was consistent with previous studies, which reported 400 -600 mg/L phenol was the inhibitory threshold (Firozjaee et al 2011, Rosenkranz et al 2013). Nevertheless, CM groups still performed better.…”

Biodegradation of phenol by a novel diatom BD1IITG-kinetics and biochemical studies

“…The value of K s (half-saturation coefficient) shows the affinity of the microorganism to the substrate. K s being inversely related to affinity of microbial system for substrate, a higher K s value indicates its lower affinity to the substrate (Firozjaee et al 2011). The value of K I (substrate inhibition constant) denotes the resistance of microorganism to the toxic effect of the substrate (Sahoo et al 2011).…”

UV photolysis for enhanced phenol biodegradation in the presence of 2,4,6-trichlorophenol (TCP)

“…Present as pollutants in many industrial wastewaters, the phenolics are responsible for chemical oxygen demand, odor, and toxicity (Hsien and Lin 2005;Juang and Tsai 2006;Firozjaee et al 2011;Holopainen et al 2013). Present as pollutants in many industrial wastewaters, the phenolics are responsible for chemical oxygen demand, odor, and toxicity (Hsien and Lin 2005;Juang and Tsai 2006;Firozjaee et al 2011;Holopainen et al 2013).…”