Biodegradation of phenol by free and immobilized Candida tropicalis NPD1401

Kumar, Satish; Neeraj,; Mishra, Viraj Krishna; Karn, Santosh Kr.

doi:10.5897/ajb2017.15906

Cited by 16 publications

(2 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, an approximate three-fold improvement in the final biomass was obtained in phenolic medium compared to the control (YNB). These results are in accordance with others found in the literature, reporting the ability of C. tropicalis CC1 [22] and C. tropicalis NPD1401 [23] to grow in phenol.…”

Section: Screening Of Yeast Strains' Ability To Grow On Phenolic Compoundssupporting

confidence: 93%

Candida tropicalis as a Promising Oleaginous Yeast for Olive Mill Wastewater Bioconversion

et al. 2021

View full text Add to dashboard Cite

Olive mill wastewater (OMW), which is generated during olive oil production, has detrimental effects on the environment due to its high organic load and phenolic compounds content. OMW is difficult to biodegrade, but represents a valuable resource of nutrients for microbial growth. In this study, yeast strains were screened for their growth on phenolic compounds usually found in OMW and responsible for antimicrobial effects. Candida tropicalis ATCC 750 demonstrated an extraordinary capacity to grow in phenolics and was chosen for further experiments with OMW-based medium. The effects of nitrogen supplementation, the pH, and the stirring rate on cellular growth, OMW-components consumption, and added-value compounds production were studied in batch cultures in Erlenmeyer flasks and in a bioreactor. Candida tropicalis was able to reduce 68% of the organic load (chemical oxygen demand) and 39% of the total phenols of OMW in optimized conditions in bioreactor experiments, producing lipase (203 U·L−1) and protease (1105 U·L−1). Moreover, intracellular lipids were accumulated, most significantly under nitrogen-limited conditions, which is common in this type of wastewater. The high potential of C. tropicalis to detoxify OMW and produce added-value compounds from it makes this process an alternative approach to other conventional processes of OMW treatment.

show abstract

Section: Screening Of Yeast Strains' Ability To Grow On Phenolic Compoundssupporting

confidence: 93%

Candida tropicalis as a Promising Oleaginous Yeast for Olive Mill Wastewater Bioconversion

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The microorganisms that are able to degrade polyphenols have been recognized in both the Bacteria and Eukarya domains. Among the best-known microorganisms that can successfully carry out phenol biodegradation, there are bacteria such as Bacillus, Pseudomonas, Flavobacterium, and Alcaligenes, as well as fungal representatives, such as Trichosporon, Aspergillus, Trametes, and the yeast Candida tropicalis [24,121].…”

Section: Microorganisms and Their Products Involved In Phenolic Biode...mentioning

confidence: 99%

Treatment of High-Polyphenol-Content Waters Using Biotechnological Approaches: The Latest Update

et al. 2022

View full text Add to dashboard Cite

Polyphenols and their intermediate metabolites are natural compounds that are spread worldwide. Polyphenols are antioxidant agents beneficial for human health, but exposure to some of these compounds can be harmful to humans and the environment. A number of industries produce and discharge polyphenols in water effluents. These emissions pose serious environmental issues, causing the pollution of surface or groundwater (which are used to provide drinking water) or harming wildlife in the receiving ecosystems. The treatment of high-polyphenol-content waters is mandatory for many industries. Nowadays, biotechnological approaches are gaining relevance for their low footprint, high efficiency, low cost, and versatility in pollutant removal. Biotreatments exploit the diversity of microbial metabolisms in relation to the different characteristics of the polluted water, modifying the design and the operational conditions of the technologies. Microbial metabolic features have been used for full or partial polyphenol degradation since several decades ago. Nowadays, the comprehensive use of biotreatments combined with physical-chemical treatments has enhanced the removal rates to provide safe and high-quality effluents. In this review, the evolution of the biotechnological processes for treating high-polyphenol-content water is described. A particular emphasis is given to providing a general concept, indicating which bioprocess might be adopted considering the water composition and the economic/environmental requirements. The use of effective technologies for environmental phenol removal could help in reducing/avoiding the detrimental effects of these chemicals. In addition, some of them could be employed for the recovery of beneficial ones.

show abstract