Enhanced biodegradation and valorization of drilling wastewater via simultaneous production of biosurfactants and polyhydroxyalkanoates by Pseudomonas citronellolis SJTE-3
| Autor: | Dimitris Pasias, Michalis Hadjicharalambous, Kostas Andreou, Efstathios Kaliviotis, George Kazamias, Ioannis Vyrides, Michalis Koutinas, Maria Kyriakou, Costas Varavvas |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Bioconversion Microorganism Bioengineering Wastewater Polyhydroxyalkanoate Polyhydroxyalkanoates chemistry.chemical_compound Surface-Active Agents Pseudomonas Food science Waste Management and Disposal Naphthalene biology Renewable Energy Sustainability and the Environment Chemical oxygen demand Biosurfactant General Medicine Biodegradation biology.organism_classification Polycyclic aromatic hydrocarbons Total petroleum hydrocarbons Biodegradation Environmental chemistry Chemical Sciences Drilling waste Pseudomonas citronellolis Natural Sciences |
| Zdroj: | Bioresource technology. 340 |
| ISSN: | 1873-2976 |
| Popis: | Pseudomonas citronellolis SJTE-3 was isolated as a highly efficient microorganism for biodegradation and valorization of drilling fluids (DF) wastewater. The strain metabolised DF and oily mud exhibiting up to 93%, 86%, 85% and 88% of chemical oxygen demand (COD), n-dodecane, n-tetradecane and naphthalene removal efficiency respectively. Enhanced bioconversion was enabled through production of biosurfactants that reduced the surface tension of water by 53% and resulted in 43.3% emulsification index (E24), while synthesizing 24% of dry cell weight (DCW) as medium-chain-length polyhydroxyalkanoates (PHA). Expression from the main pathways for alkanes and naphthalene biodegradation as well as biosurfactants and PHA biosynthesis revealed that although the alkanes and naphthalene biodegradation routes were actively expressed even at stationary phase, PHA production was stimulated at late stationary phase and putisolvin could comprise the biosurfactant synthesized. The bioconversion of toxic petrochemical residues to added-value thermoelastomers and biosurfactants indicate the high industrial significance of P. citronellolis SJTE-3. |
| Databáze: | OpenAIRE |
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