Valorization of biodiesel side stream waste glycerol for rhamnolipids production by Pseudomonas aeruginosa RS6

Baskaran, Shobanah Menon; Zakaria, Mohd Rafein; Sabri, Ahmad Syafiq Mukhlis Ahmad; Mohamed, Mona H.; Wasoh, Helmi; Maeda, Takeyasu; Hassan, Mohd Ali; Banat, İbrahim M.

doi:10.1016/j.envpol.2021.116742

Cited by 34 publications

(12 citation statements)

References 61 publications

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“…pH greatly affected lipase activity (Figure 2c). It was observed that lipase activity was the highest in the medium with pH 8 (11.39 U/mL), consistent with earlier similar results from other studies [37]. In addition, the cells grew well at pH 5~9 with an optimum pH of 7.…”

Section: Isolation Of Wco-utilizing Strainssupporting

confidence: 91%

Conversion of Waste Cooking Oil to Rhamnolipid by a Newly Oleophylic Pseudomonas aeruginosa WO2

Shi

Teng

Liu

et al. 2022

IJERPH

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The components of waste cooking oil (WCO) are complex and contain toxic substances, which are difficult to treat biologically. Pseudomonas aeruginosa WO2 was isolated from oily sludge by an anaerobic enrichment–aerobic screening method, which could efficiently utilize WCO and produce rhamnolipid. The effects of nutrients and culture conditions on bacterial growth and lipase activity were investigated to optimize the fermentation of WCO. The results showed that strain WO2 utilized 92.25% of WCO and produced 3.03 g/L of rhamnolipid at 120 h. Compared with inorganic sources, the organic nitrogen source stabilized the pH of fermentation medium, improved lipase activity (up to 19.98 U/mL), and promoted the utilization of WCO. Furthermore, the WO2 strain exhibited inferior utilization ability of the soluble starch contained in food waste, but superior salt stress up to 60 g/L. These unique characteristics demonstrate the potential of Pseudomonas aeruginosa WO2 for the utilization of high-salinity oily organic waste or wastewater.

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Section: Isolation Of Wco-utilizing Strainssupporting

confidence: 91%

Conversion of Waste Cooking Oil to Rhamnolipid by a Newly Oleophylic Pseudomonas aeruginosa WO2

Shi

Teng

Liu

et al. 2022

IJERPH

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“…At optimal fermentation conditions, ST declined from 72.13 mN m −1 to 29.4-30.4 mN m −1 ; therefore biosurfactant activity was reported to be better than that of some chemical-based surfactants and similar to the activity observed in our studies. 49 Corresponding to our research ST drop was observed in another study, where glycerol was applied as a substrate for anaerobic production of rhamnolipids. Three strains of P. aeruginosa (SG, L6-1 and FA1) reduced the ST at different substrate concentrations from 63 Biosurfactant production in the P. antarctica 28E culture affected emulsifying properties of the cultivation medium was indicated in addition by the growing E 24 %.…”

Section: Kinetics Of Biosurfactant Productionsupporting

confidence: 55%

Production and characterization of lipopeptide biosurfactant from a new strain ofPseudomonas antarctica28E using crude glycerol as a carbon source

et al. 2023

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“…Furthermore, several studies have reported the possibility of producing surfactin by solid-state fermentation using wastes that are difficult to hydrolyze, such as rice straw, alone or in combination with other food byproducts [28]. Crude glycerol from biodiesel and other oleo-chemical production processes can also be used as a cheap component of the culture medium, namely as the water-soluble carbon source [29]. The use of waste glycerol in several biotechnological processes is becoming very important due to the large amounts that are being generated by the biodiesel industry every year.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Surfactin Production by Bacillus subtilis Using Crude Glycerol from Different Wastes

et al. 2021

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Most biosurfactants are obtained using costly culture media and purification processes, which limits their wider industrial use. Sustainability of their production processes can be achieved, in part, by using cheap substrates found among agricultural and food wastes or byproducts. In the present study, crude glycerol, a raw material obtained from several industrial processes, was evaluated as a potential low-cost carbon source to reduce the costs of surfactin production by Bacillus subtilis #309. The culture medium containing soap-derived waste glycerol led to the best surfactin production, reaching about 2.8 g/L. To the best of our knowledge, this is the first report describing surfactin production by B. subtilis using stearin and soap wastes as carbon sources. A complete chemical characterization of surfactin analogs produced from the different waste glycerol samples was performed by liquid chromatography–mass spectrometry (LC-MS) and Fourier transform infrared spectroscopy (FTIR). Furthermore, the surfactin produced in the study exhibited good stability in a wide range of pH, salinity and temperatures, suggesting its potential for several applications in biotechnology.

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Valorization of biodiesel side stream waste glycerol for rhamnolipids production by Pseudomonas aeruginosa RS6

Cited by 34 publications

References 61 publications

Conversion of Waste Cooking Oil to Rhamnolipid by a Newly Oleophylic Pseudomonas aeruginosa WO2

Conversion of Waste Cooking Oil to Rhamnolipid by a Newly Oleophylic Pseudomonas aeruginosa WO2

Production and characterization of lipopeptide biosurfactant from a new strain ofPseudomonas antarctica28E using crude glycerol as a carbon source

Sustainable Surfactin Production by Bacillus subtilis Using Crude Glycerol from Different Wastes

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