Simultaneous lipid production and dairy wastewater treatment using Rhodococcus opacus in a batch bioreactor for potential biodiesel application

Kumar, Sanjay; Gupta, Nikhil; Pakshirajan, Kannan

doi:10.1016/j.jece.2015.05.030

Cited by 72 publications

(28 citation statements)

References 31 publications

(42 reference statements)

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“…Figure shows the 1 H‐NMR (400 MHz, CDCl 3 ) spectra of the procured coconut oil utilized in this study. The proton shift at 0.8, 1.25, and 1.55 ppm indicates the presence of saturated fatty acid region, whereas the proton shift at 5.25 ppm represents CH  CH group of the unsaturated fatty acids in the coconut oil . Also, a quartet at about 4.2 ppm is caused by the methylene protons of the ethyl group of the stearic acid.…”

Section: Resultsmentioning

confidence: 99%

Plasticizing effect of coconut oil on morphological, mechanical, thermal, rheological, barrier, and optical properties of poly(lactic acid): A promising candidate for food packaging

Bhasney

Patwa

Kumar

et al. 2017

J of Applied Polymer Sci

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This study explores the plasticizing effect of coconut oil (CO) on PLA for evaluating its suitability for flexible packaging. Changes in morphological, mechanical, thermal, rheological, barrier and optical properties of melt compounded Poly(lactic acid)-Coconut oil (PLA-CO) blend were investigated by varying the mixing ratio. Water vapor permeability of blends decreased by 58% at 7 wt % plasticizer content. The tensile strength showed a decreasing trend with increasing plasticizer percentage while the % elongation showed an increasing trend. At 7 wt % plasticizer content tensile strength decreased from 60 to 41 MPa and % elongation increased from 12% to 54%. Molecular weight (M n ) and onset of degradation (T onset ), upon 1 wt % plasticizer addition showed a reduction of 6% and 0.6%, respectively, which were well within permissible limits required for polymer processing. The melt flow properties of the blends were slightly improved (16%) upon 5 wt % addition of CO. Transparency of the PLA films was improved by addition of plasticizer. FTIR spectra of PLA-CO sample confirmed the interaction between PLA and coconut oil via hydrogen bonding. At higher loading, coconut oil shows very limited compatibility with PLA.

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Section: Resultsmentioning

confidence: 99%

Plasticizing effect of coconut oil on morphological, mechanical, thermal, rheological, barrier, and optical properties of poly(lactic acid): A promising candidate for food packaging

Bhasney

Patwa

Kumar

et al. 2017

J of Applied Polymer Sci

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“…The following characteristics of the biodiesel produced by transesterification of the C. vulgaris lipids were estimated: viscosity (η), cetane number (CN), flash point (Fp), cloud point (Cp), pour point (Pp), saponification value (Sv), iodine value (Iv), and heating value (Hv), as per the following empirical equations [12]:…”

Section: Methodsmentioning

confidence: 99%

“…However, the dairy effluent still contained nitrogen, phosphorus, and other nutrients. Many researchers have reported that 246-931 mg/L of COD, 80-180 mg/L of BOD, 10-34 mg/L of total nitrogen (TN), and 5-18 mg/L of total phosphorus (TP) remained from the 1,800-3,700 mg/L, 1,100-2,900 mg/L, 68-109 mg/L, and 14-27 mg/L initial concentrations of COD, BOD, TN, and TP, respectively [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Microalgae cultures from wastewater can significantly contribute to the management of water ecosystems by providing an inexpensive, environmentally friendly system for wastewater treatment. Using dairy effluent for microalgal cultures is beneficial for minimizing the use of freshwater, reducing the cost of nutrient addition, removing the remaining nitrogen and phosphorus, and producing microalgal biomass as bioresources for biofuel or high-value by-products [12,15,16]. However, few studies exist regarding the potential use of microalgae for dairy wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

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Dairy wastewater treatment using microalgae for potential biodiesel application

Choi

2016

Environmental Engineering Research

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The aim of this study was to evaluate the biomass production and dairy wastewater treatment using Chlorella vulgaris. The results indicated that the maximum percentages of biochemical oxygen demand, chemical oxygen demand, suspended solids, total nitrogen, and total phosphorus removed were 85.61%, 80.62%, 29.10%, 85.47%, and 65.96%, respectively, in dairy effluent at 10 d. A maximum of 1.23 g/L dry biomass was obtained in 7 d. The biomass productivity was strongly influenced by the nutrient reduction in the dairy effluent. The biodiesel produced by the C. vulgaris in the dairy effluent was in good agreement with the American Society of Testing and Materials-D6751 and European Standards 14214 standards. Therefore, using dairy effluent for microalgal cultures could be a useful and practical strategy for an advanced, environmentally friendly treatment process.

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“…Fusarium equiseti UMN-1 Glucose 56 [15] Sarocladium kiliense ADH17 Glucose and glycerol 33 [16] Mortierella alpina LP M 301 Glucose with potassium nitrate 31 [17] Microsphaeropsis sp. Corncob waste liquor 22 [18] Bacteria Rhodococcus opacus DSM 1069 Ethanol organosolv lignin 4 [19] R. opacus PD630 Dairy wastewater 14 [20] amounts [31,32]. To this end, several alternative techniques enabling high-throughput and reliable lipid quantification have emerged recently [31,33].…”

Section: Sucrose 49mentioning

confidence: 99%

Lipids detection and quantification in oleaginous microorganisms: an overview of the current state of the art

2019

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Oleaginous microorganisms are among the most promising feedstocks for the production of lipids for biofuels and oleochemicals. Lipids are synthesized in intracellular compartments in the form of lipid droplets. Therefore, their qualitative and quantitative analysis requires an initial pretreatment step that allows their extraction. Lipid extraction techniques vary with the type of microorganism but, in general, the presence of an outer membrane or cell wall limits their recovery. This review discusses the various types of oleaginous microorganisms, their lipid accumulating capabilities, lipid extraction techniques, and the pretreatment of cellular biomass for enhanced lipid recovery. Conventional methods for lipid quantification include gravimetric and chromatographic approaches; whereas nonconventional methods are based on infrared, Raman, nuclear magnetic resonance, and fluorescence spectroscopic analysis. Recent advances in these methods, their limitations, and fields of application are discussed, with the aim of providing a guide for selecting the best method or combination of methods for lipid quantification.

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Simultaneous lipid production and dairy wastewater treatment using Rhodococcus opacus in a batch bioreactor for potential biodiesel application

Cited by 72 publications

References 31 publications

Plasticizing effect of coconut oil on morphological, mechanical, thermal, rheological, barrier, and optical properties of poly(lactic acid): A promising candidate for food packaging

Plasticizing effect of coconut oil on morphological, mechanical, thermal, rheological, barrier, and optical properties of poly(lactic acid): A promising candidate for food packaging

Dairy wastewater treatment using microalgae for potential biodiesel application

Lipids detection and quantification in oleaginous microorganisms: an overview of the current state of the art

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