Characterization of aerobic oil and grease-degrading bacteria in wastewater
| Autor: | Saravanan Sankara, Assad Thukair, Alexis Nzila, Shaikh A. Razzak |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Microbial Consortia Pseudomonas libanensis Wastewater 010501 environmental sciences 01 natural sciences chemistry.chemical_compound RNA Ribosomal 16S 010608 biotechnology Glycerol Environmental Chemistry Food science Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Bacteria biology Sphingobacterium Chemistry Chemical oxygen demand General Medicine Biodegradation biology.organism_classification Hydrocarbons RNA Bacterial Biodegradation Environmental Petroleum Biochemistry Pseudomonas poae |
| Zdroj: | Environmental Technology. 38:661-670 |
| ISSN: | 1479-487X 0959-3330 |
| Popis: | A bacterial consortium that degrades cooking oil (CO) has been isolated in wastewater (WW) samples, by enrichment in olive CO. This consortium could degrade 90% of CO within 7-9 days (from an initial 1% [w/v]), and it is more active at alkaline conditions. The 16S ribonucleic acid (RNA) gene analysis showed that it contains five bacterium species: Stenotrophomonas rhizophila, Sphingobacterium sp., Pseudomonas libanensis, Pseudomonas poae and Pseudomonas aeruginosa. This consortium can degrade the free fatty acids (FFA): palmitic, stearic, oleic, linoleic and linolenic acids; glycerol, glucose and amylose; and albumin, but could not efficiently degrade carboxymethyl-cellulose. Each strain could also degrade CO and FFAs. The level of bacterial crude-activity of extracellular lipases was found to be between 0.2 and 4U/ml. Using synthetic WW, the consortium could reduce 80% of the chemical oxygen demand [from 10550 ± 2828 mg/l], 80% of nitrogen (from 410 ± 78 mgl/l) and 57% of phosphorus (from 93 ± 25 mg/l). Thus, this consortium can be utilized in the removal of CO from WW. |
| Databáze: | OpenAIRE |
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