Optimal biostimulation strategy for phenol degradation with indigenous rhizobium Ralstonia taiwanensis

Continuous biodegradation of phenol in a spouted bed bioreactor (SBBR)

“…Nevertheless, numerous other types of bacteria and biosorbents were also utilized for biodegradation or removal of phenol, such as: Rhodococcus erythropolis [3]; Bacillius sp. [4]; Alcaligenes faecalis [5]; rhizobium Ralstonia taiwanensis [6]; Nocardia hydrocarbonoxydans [7]; Candida tropicalis [8][9][10]; Cupriavidus metallidurans [11] and activated sludge [12].…”

Optimal exponential feeding strategy for dual-substrate biostimulation of phenol degradation using Cupriavidus taiwanensis

“…According to Haldane's model for phenol degradation of R. taiwanensis (i.e., C. taiwanensis) [2], the optimal degradation rate was 61 mol/mol/g cell occurring at a phenol concentration of 228 M. In addition, the low saturation constant (K S ) of 5.46 M and high inhibition constant of 9075 M suggested a promising potential of using R186 for practical bioremediation [2]. As indicated in previous studies [4,5], the indigenous rhizobium C. taiwanensis R186 was feasible to be used for bioremediation of phenol-contaminated soil, freshwater and wastewater.…”

“…The optimal feeding strategy for exponential growth was obtained at approximately˛= 0.50-0.55 max [8]. Moreover, to provide optimal biostimulation strategy for maximization of the performance of phenol degradation, we first considered the approach of toxicity reduction of phenol via cloaking of augmented nutrient source [5]. Our findings indicated that among several augmented carbon sources examined, glycerol appeared to be the best augmented carbon substrate, allowing effective enhancement of phenol degradation with simultaneous utilization of glycerol and phenol for cellular growth, instead of diauxic growth [5].…”

“…Moreover, to provide optimal biostimulation strategy for maximization of the performance of phenol degradation, we first considered the approach of toxicity reduction of phenol via cloaking of augmented nutrient source [5]. Our findings indicated that among several augmented carbon sources examined, glycerol appeared to be the best augmented carbon substrate, allowing effective enhancement of phenol degradation with simultaneous utilization of glycerol and phenol for cellular growth, instead of diauxic growth [5]. The phenomenon of non-diauxic consumption of dual substrates seems to make glycerol an ideal biostimulation nutrient supplement to stimulate phenol biodegradation.…”

Revealing azo-dye decolorization of indigenous Aeromonas hydrophila from fountain spring in Northeast Taiwan

“…According to Perlmutter (1972) and Chen et al (2007), the (bio)chemical reactor models can be in terms of the form:…”