One-time cultivation of Chlorella pyrenoidosa in aqueous dye solution supplemented with biochar for microalgal growth, dye decolorization and lipid production

Behl, Kannikka; Sinha, Surbhi; Sharma, Mahima; Singh, Rachana; Joshi, Monika; Bhatnagar, Amit; Nigam, Subhasha

doi:10.1016/j.cej.2019.01.180

Cited by 45 publications

(11 citation statements)

References 47 publications

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“…The empty spaces in the disordered structures of both WB and KWB allowed the coupling of AB 161 molecules with their surface functional groups. A similar crystalline nature was described by XRD diffraction analyses of pecan nutshells biochar (Zazycki et al 2018), microalgae biochar (Behl et al 2019) and saccharide-derived biochar (Tran et al 2017).…”

Section: Xrd Diffraction Analysissupporting

confidence: 70%

Degradation of a leather-dye by the combination of depolymerised wood-chip biochar adsorption and solid-state fermentation with Trametes villosa SCS-10

Ortiz-Monsalve

Gutterres

Valente

et al. 2020

Bioresour. Bioprocess.

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Adsorption into biochar-derived materials and mycoremediation are promising technologies for removing dyes from solid and liquid matrices. This study presents a combined treatment with adsorption into wood-chip biochar and mycodegradation under solid-state fermentation by Trametes villosa for removing the leather-dye Acid Blue 161. In the first stage, untreated wood-chip biochar, NaOH–depolymerised biochar and KMnO4–depolymerised biochar were assessed for their dye removal efficiency by adsorption. KMnO4–depolymerised biochar exhibited the highest adsorption (85.1 ± 1.9%) after 24 h of contact. KMnO4–depolymerisation modified some physical and chemical properties on the untreated wood-chip biochar, increasing the surface area (50.4 m2 g–1), pore size (1.9 nm), and presence of surface functional groups. Response surface methodology coupled with a Box–Behnken design was used to optimise the AB161 adsorption into the KMnO4–depolymerised biochar. The optimised conditions, pH 3.0, dye concentration 100 mg L–1 and sorbent dosage 2 g L–1, led to a higher dye removal efficiency by adsorption (91.9 ± 1.0%). In a second stage, the wood-chip biochar supplemented with nutrients (1% malt extract and 0.5% peptone) was employed as a solid matrix for growing T. villosa and regenerating the dye-saturated material. After 15 days, T. villosa was able to grow (86.8 ± 0.8%), exhibit laccase activity (621.9 ± 62.3 U L–1), and biodegrade (91.4 ± 1.3%) the dye adsorbed into the KMnO4–depolymerised biochar. Finally, the mycoregenerated biochar was reutilised in a new cycle of adsorption reaching 79.5 ± 2.0% of dye removal efficiency by adsorption. This study revealed the potential of the combined treatment and is an initial assessment for developing commercial alternatives for treating leather industry wastewaters.

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Section: Xrd Diffraction Analysissupporting

confidence: 70%

Degradation of a leather-dye by the combination of depolymerised wood-chip biochar adsorption and solid-state fermentation with Trametes villosa SCS-10

Ortiz-Monsalve

Gutterres

Valente

et al. 2020

Bioresour. Bioprocess.

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“…This is ascribed due to the availability of many unoccupied adsorption sites at lower concentration that facilitates the greater adsorption efficiency. At higher concentration, these necessary active sites will be lacking and competition may exist between dye molecules which reduces the dye removal efficiency [65,66]. From Figures S4(c) and S5(c), it is evident that adsorbent dosage has a significant effect on the MB removal efficiency onto SCH and NCH.…”

Section: Main Effects Of Parameters On Adsorption Efficiencymentioning

confidence: 99%

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Murthy

Gowrishankar

2020

SN Appl. Sci.

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Coffee husk (CH) was physically and chemically treated with autoclaving (SCH) and NaOH (NCH) to develop low-cost adsorbent for the removal of methylene blue (MB) from synthetic wastewater, and their adsorption efficiencies were evaluated in batch mode. The prepared adsorbent was characterised by SEM, FTIR and point of zero charge. The central composite rotatable design (CCRD) was employed to optimise the adsorption process parameters such as pH, adsorbent dosage and initial MB concentration. The second-order quadratic model fitted best with the experimental adsorption data, and ANOVA results showed that the developed model was significant. The linear terms in the model significantly influence the adsorption capacity of SCH and NCH, but interaction terms were not significant. At optimised conditions, the developed adsorbents can remove > 90% of MB from the aqueous solution. Freundlich model showed a better fit with the adsorption isotherm data with R 2 greater than 0.95. Kinetics of MB adsorption onto SCH and NCH followed the pseudo-second-order model. The maximum monolayer adsorption capacity was found to be 129 and 200 mg/g for SCH and NCH, respectively. The present study showed that pretreated coffee husk waste can be used as an alternative for expensive adsorbents for the removal of dyes from wastewater.

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“…6,7 At present, a vast literature on biological treatments using bacteria, fungi and algae have been reported to efficiently decolorize azo dyes. [8][9][10] Unfortunately, the study on biodecolorization of anthraquinone dyes is still insufficient and the effect is undesirable. For instance, Holkar et al 11 isolated a strain of Escherichia sp.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient biodegradation of reactive blue 19 under the activation of tea residue by a newly screened mixed bacterial flora DDMY2

Xie

Zheng

et al. 2019

RSC Adv.

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One-time cultivation of Chlorella pyrenoidosa in aqueous dye solution supplemented with biochar for microalgal growth, dye decolorization and lipid production

Cited by 45 publications

References 47 publications

Degradation of a leather-dye by the combination of depolymerised wood-chip biochar adsorption and solid-state fermentation with Trametes villosa SCS-10

Degradation of a leather-dye by the combination of depolymerised wood-chip biochar adsorption and solid-state fermentation with Trametes villosa SCS-10

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Highly efficient biodegradation of reactive blue 19 under the activation of tea residue by a newly screened mixed bacterial flora DDMY2

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