Characterization of cometabolic degradation of p-cresol with phenol as growth substrate by Chlorella vulgaris

A Chlorella sp.-Cupriavidus necator (C. necator) consortium was artificially established for phenol degradation. The synergistic relationship between Chlorella sp. and C. necator was initially demonstrated, and then the effects of Chlorella sp./C. necator inoculation ratio, light intensity, temperature and pH on the performance of this consortium were systematically evaluated and optimized. The optimal conditions for phenol degradation were as follows: a Chlorella sp./C. necator inoculation ratio of 1:1, a light intensity of 110 µmol m -2 s -1 , a temperature in the range of 25-32 ℃ and a pH in the range of 5.5-7.5. Under optimal conditions, this consortium could degrade phenol with a maximum concentration of 1200 mg L -1 within 60 h. Comparative transcriptomic analysis was conducted to discuss the symbiosis mechanism of this consortium subject to high phenol concentrations. The up-regulation of genes involved in photosynthesis and carbon fixation of Chlorella sp. demonstrated the CO2 and O2 exchange between Chlorella sp. and C. necator, which, we suggest, may be the main reason for their mutual promotion of growth and phenol degradation.

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“…al. 2017; Priyadharshini et al, 2017;Xiao et al, 2019). In this experiment, the toxicity of phenol to Chlorella sp.…”

mentioning

confidence: 77%

An efficient Chlorella sp.-Cupriavidus necator microcosm for phenol degradation and its cooperation mechanism

Tao

Shi

Huang

et al. 2020

Science of The Total Environment

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“…Phenol is consumed by microorganisms such as bacteria, algae, yeast, and fungi and convert them to harmless compound Can lead to toxic by-products 67-69 Growth control problem Not suitable for high concentrations of phenol Sludge production Requires use of co-solvent when the concentration of phenol is low Enzyme degradation Enzymatic reactions are specic in nature and happened under moderate pH and temperature Non-reusability of the enzymes [69][70][71] Higher catalytic efficiency and lower cost than the traditional chemical methods Enzyme instability in the harsh environment of the wastewater…”

Section: Biological Treatments Biological Degradationmentioning

confidence: 99%

Ionic liquids and deep eutectic solvents for the recovery of phenolic compounds: effect of ionic liquids structure and process parameters

et al. 2021

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“…For example the phycoremediation of phenol with a sufficient growth of Chlorella vulgaris decreased from complete removal at 100 mg l −1 to 55·68% at 300 mg l −1 till reaching to negligible growth and removal at 800 mg phenol l −1 (Xiao et al . 2019). However, the large initial microalgal inoculum is reported to enhance the phycoremediation of elevated concentrations of phenol.…”

Section: Factors Affecting Phenol Phycoremediationmentioning

confidence: 99%

Phycoremediation of phenol‐polluted petro‐industrial effluents and its techno‐economic values as a win‐win process for a green environment, sustainable energy and bioproducts

Nassar

2021

J Appl Microbiol

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Summary The discharge of the toxic phenol‐polluted petro‐industrial effluents (PPPIE) has severe environmental negative impacts, thus it is mandatory to be treated before its discharge. The objective of this review was to discuss the sustainable application of microalgae in phenols degradation, with a special emphasis on the enzymes involved in this bioprocess and the factors affecting the success of PPPIE phycoremediation. Moreover, it confers the microalgae bioenergetic strategies to degrade different forms of phenols in PPPIE. It also points out the advantages of the latest application of bacteria, fungi and microalgae as microbial consortia in phenols biodegradation. Briefly, phycoremediation of PPPIE consumes carbon dioxide emitted from petro‐industries for; valorization of the polluted water to be reused and production of algal biomass which can act as a source of energy for such integrated bioprocess. Besides, the harvested algal biomass can feasibly produce; third‐generation biofuels, biorefineries, bioplastics, fish and animal feed, food supplements, natural dyes, antioxidants and many other valuable products. Consequently, this review precisely confirms that the phycoremediation of PPPIE is a win‐win process for a green environment and a sustainable future. Thus, to achieve the three pillars of sustainability; social, environmental and economic; it is recommendable to integrate PPPIE treatment with algal cultivation. This integrated process would overcome the problem of greenhouse gas emissions, global warming and climate change, solve the problem of water‐scarce, and protect the environment from the harmful negative impacts of PPPIE.

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Characterization of cometabolic degradation of p-cresol with phenol as growth substrate by Chlorella vulgaris

Cited by 56 publications

References 42 publications

An efficient Chlorella sp.-Cupriavidus necator microcosm for phenol degradation and its cooperation mechanism

An efficient Chlorella sp.-Cupriavidus necator microcosm for phenol degradation and its cooperation mechanism

Ionic liquids and deep eutectic solvents for the recovery of phenolic compounds: effect of ionic liquids structure and process parameters

Phycoremediation of phenol‐polluted petro‐industrial effluents and its techno‐economic values as a win‐win process for a green environment, sustainable energy and bioproducts

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