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AuthorSurkatti R.
AuthorEl-Naas M.H.
Available date2020-02-05T08:53:06Z
Publication Date2018
Publication NameInternational Journal of Environmental Science and Technology
ISSN17351472
URIhttp://dx.doi.org/10.1007/s13762-017-1383-2
URIhttp://hdl.handle.net/10576/12697
AbstractPhenol and its methylated derivatives, cresol isomers, are hazardous pollutants that are commonly present in various industrial effluents and known to have detrimental effect on aquatic life as well as human health, due to their toxic and carcinogenic nature. It is essential, therefore, to reduce the concentration of these contaminants in industrial effluent to acceptable levels prior to being discharged into the environment. Bacterial cells of the strain Pseudomonas putida, with excellent biodegradation capabilities and high tolerance of cresols, were extracted and immobilized in polyvinyl alcohol (PVA) gel for cresols biodegradation. The biodegradation was carried out at different operating conditions, in both batch and continuous modes, using a cylindrical spouted bed bioreactor. Factors affecting o-cresol and m-cresol degradation were studied in batch experiments, and the results showed that the immobilized bacteria could tolerate cresols concentration up to 200�mg/l. Moreover, the experiments indicated that the biodegradation rate was highly affected by the operating parameters such as pH and temperature, with optimum ranges of 6-8 for pH and 30-35��C for temperature. However, the optimum conditions were different for each cresol isomer. The potential of P. putida in degrading binary and ternary mixtures of cresols was also examined in the continuous process and compared with single component biodegradation. The experimental results revealed that the biodegradation of o-cresol was highly inhibited by the presence of p-cresol and m-cresol. 2017, Islamic Azad University (IAU).
SponsorAcknowledgements The authors gratefully acknowledge the financial support provided by the Japan Cooperation Center, Petroleum
Languageen
PublisherCenter for Environmental and Energy Research and Studies
SubjectBiodegradation
SubjectInhibition
SubjectPseudomonas putida
SubjectTernary mixture
SubjectWastewater treatment
TitleCompetitive interference during the biodegradation of cresols
TypeArticle
Pagination301-308
Issue Number2
Volume Number15


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