Management of soybean oil refinery wastes through recycling them for producing biosurfactant using Pseudomonas aeruginosa MR01

Partovi, Maryam; Lotfabad, Tayebe Bagheri; Roostaazad, Reza; Bahmaei, Manochehr; Tayyebi, Shokoufe

doi:10.1007/s11274-013-1267-7

Cited by 44 publications

(25 citation statements)

References 17 publications

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“…Moreover, the CSL alone did not support the bacterial growth and hence biosurfactant production. And a CSL concentration of more than 5mL/L suppressed biosurfactant secretion ( Table), likely originating from a relationship between biosurfactant production yield and C/N ratio [25,26]. The significant upper and lower limits of carbon and nitrogen sources construed from the one-factor-at-a-time step are summarized in Table . Data from the factorial design were subjected to multiple regression analysis using least squares regression methodology by Box-Behnken design.…”

Section: Optimization Design and Results By Rsm Methodologymentioning

confidence: 99%

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Optimization of low-cost biosurfactant production from agricultural residues through response surface methodology

Ebadipour

Lotfabad

Yaghmaei

et al. 2015

Preparative Biochemistry and Biotechnology

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Biosurfactants are surface-active compounds capable of reducing surface tension and interfacial tension. Biosurfactants are produced by various microorganisms. They are promising replacements for chemical surfactants because of biodegradability, nontoxicity, and their ability to be produced from renewable sources. However, a major obstacle in producing biosurfactants at the industrial level is the lack of cost-effectiveness. In the present study, by using corn steep liquor (CSL) as a low-cost agricultural waste, not only is the production cost reduced but a higher production yield is also achieved. Moreover, a response surface methodology (RSM) approach through the Box-Behnken method was applied to optimize the biosurfactant production level. The results found that biosurfactant production was improved around 2.3 times at optimum condition when the CSL was at a concentration of 1.88 mL/L and yeast extract was reduced to 25 times less than what was used in a basic soybean oil medium (SOM). The predicted and experimental values of responses were in reasonable agreement with each other (Pred-R(2) = 0.86 and adj-R(2) = 0.94). Optimization led to a drop in raw material price per unit of biosurfactant from $47 to $12/kg. Moreover, the biosurfactant product at a concentration of 84 mg/L could lower the surface tension of twice-distilled water from 72 mN/m to less than 28 mN/m and emulsify an equal volume of kerosene by an emulsification index of (E24) 68% in a two-phase mixture. These capabilities made these biosurfactants applicable in microbial enhanced oil recovery (MEOR), hydrocarbon remediation, and all other petroleum industry surfactant applications.

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Section: Optimization Design and Results By Rsm Methodologymentioning

confidence: 99%

“…The total cost of raw materials and the productivity of biosurfactant produced by P. aeruginosa MR01 in different processes have been shown in table 7 [20,21,25,34].…”

Section: Coefficients a B And CD In Equation Ofmentioning

confidence: 99%

Optimization of low-cost biosurfactant production from agricultural residues through response surface methodology

Ebadipour

Lotfabad

Yaghmaei

et al. 2015

Preparative Biochemistry and Biotechnology

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“…One economic survey indicated that the cost of the raw materials accounted for 50% of the total production costs of biosurfactant . One strategy to overcome the expense of raw materials would be to use water‐immiscible wastes such as the vegetable oil residues from refinery plants . These residues not only lead to economic losses for the industry, but constitute an environmental hazard.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a recycling bioreactor for biosurfactant production byPseudomonas aeruginosaMR01 using soybean oil waste

Lotfabad

Ebadipour

Roostaazad

2015

J. Chem. Technol. Biotechnol.

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BACKGROUND: This study deals with the large-scale production of biosurfactant from soybean oil soapstock by Pseudomonas aeruginosa MR01. The production of biosurfactant was carried out in a newly designed bioreactor equipped with recycling flow under three operational conditions. Kinetic studies were conducted at both shake flask and 5-L bioreactor scales during fermentation in a soapstock medium. Mathematical equations were developed to model the kinetic patterns at both scales.RESULT: Statistical analyses demonstrated the goodness of fit, with regression r-squared, R 2 , between 0.97and 0.99 for different models. Furthermore, biosurfactant concentration in the bioreactor including the recycling flow, which was switched on and off during a 6-h period, reached 25.5 g L −1 (Y P/S =0.9) which showed 41.5% and 21.5% growth compared with experiments conducted in a shake flask and a non-recycling-flow bioreactor, respectively. Moreover, the crude biosurfactant at a concentration of 24 mg L −1 was observed to have lowered the surface tension of double-distilled water from 72 mN m −1 to 28.5 mN m −1 and displayed an emulsification index (E24) of 63% against kerosene. INTRODUCTIONBiosurfactants are surface active agents which are obtained from a variety of natural sources and display different properties, such as surface and/or interfacial tension lowering, detergency, emulsifying, foaming, dispersing. 1 They are able to retain their selectivity and specific activity under severe conditions such as extreme temperatures, pHs and salinities.2,3 The diverse capabilities of biosurfactants make them applicable to a variety of industries, such as food, pharmacy, cosmetic, 4 enhanced oil recovery, 5 and the remediation of oil spills. 6,7 The fact that they are biodegradable makes them superior to their chemical counterparts. Hence, biosurfactants are referred to as green alternatives to petrochemical surfactants. However, price is the greatest concern in marketing and therefore in industry. Lang et al. in 1999 reported that the production cost of rhamnolipid biosurfactants is estimated at $20-$25 per kg, varying with the fermentation scale from 20 000 to 100 000 L, whereas the production cost of synthetic surfactants is only approximately $1-$3 per kg.8 Still, Noparat et al. 9 reported that the total world production of surfactants exceeds more than 13 million tons per year, therefore to meet the demand, biological surfactants should be produced economically to help supply the worldwide market. One economic survey indicated that the cost of the raw materials accounted for 50% of the total production costs of biosurfactant. 3,5 One strategy to overcome the expense of raw materials would be to use water-immiscible wastes such as the vegetable oil residues from refinery plants.9 -14 These residues not only lead to economic losses for the industry, but constitute an environmental hazard. A large quantity of soapstock is generated annually from the processing of vegetable oil and has an average price of approximately 10% of that ...

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“…Reuse and recycling activities of heavy metals can reduce the demand for raw materials and energy while minimizing the impact of waste disposal [11]. Although the method of incineration is rather progressive (most of the hazardous components are transformed into less dangerous substances, combined with volume reduction), but there are some harmful side effects such as sulphur and nitrogen oxides, hydrogen chloride, dioxins, heavy metals compounds, ash and other materials are generated which causes groundwater pollution and contamination [12].…”

Section: Introductionmentioning

confidence: 99%

Time Efficient Co-composting of Water Hyacinth and Industrial Wastes by Microbial Degradation and Subsequent Vermicomposting

Arya¹

2014

J Bioremed Biodeg

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Time efficient co-composting of distillery and paint sludge industrial wastes with 2:1:1 ratio of water hyacinth, cow-dung and saw-dust in combination with Trichoderma viride, Phanerochaete chrysosporium, Bacillus cereus and earthworms was done. The decrease in MC, TOC and C:N ratio and increase in temperature, TKN, pH, TK, TP was significant. Out of five treatments, DS3 (60% distillery sludge) and DS4 (80% distillery sludge) treatments were stable and matured with C:N ratio of 18.68 ± 1.1 and 14.73 ± 1.12 respectively. Maximum earthworm numbers (26) were obtained in DS1 substrate and maximum cocoons (10) were counted in PS1 substrate. 20% (w/w) vermicompost mixed soil induced the growth in root length (4.6 ± 0.21), shoot length (5.4 ± 0.10) and 90% GI while >20% (w/w) have inhibitory effects on plant growth. Therefore these treatments can be applied in agronomic field as a soil amendment.

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Management of soybean oil refinery wastes through recycling them for producing biosurfactant using Pseudomonas aeruginosa MR01

Cited by 44 publications

References 17 publications

Optimization of low-cost biosurfactant production from agricultural residues through response surface methodology

Optimization of low-cost biosurfactant production from agricultural residues through response surface methodology

Evaluation of a recycling bioreactor for biosurfactant production byPseudomonas aeruginosaMR01 using soybean oil waste

Time Efficient Co-composting of Water Hyacinth and Industrial Wastes by Microbial Degradation and Subsequent Vermicomposting

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