scholarly journals Synthesis of Dietetic Structured Lipids from Spent Coffee Grounds Crude Oil Catalyzed by Commercial Immobilized Lipases and Immobilized Rhizopus oryzae Lipase on Biochar and Hybrid Support

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1542
Author(s):  
Danyelle A. Mota ◽  
Jefferson C. B. Santos ◽  
Diana Faria ◽  
Álvaro S. Lima ◽  
Laiza C. Krause ◽  
...  
Keyword(s):  
Crude Oil ◽  
Rhizopus Oryzae ◽  
Structured Lipids ◽  
Thermomyces Lanuginosus ◽  
Spent Coffee Grounds ◽  
Lipozyme Tl Im ◽  
Rhizopus Oryzae Lipase ◽  
Lipozyme Rm Im ◽  
Coffee Grounds ◽  
Pharmaceutical Industries

The aim of this study was the valorization of coffee industry residues, namely spent coffee grounds (SCG) as a source of oil, and silverskin (CS) as a source of both oil and biomass, under the concept of the circular economy. Therefore, crude oil from SCG was used to produce low-calorie structured lipids (SL) for food and pharmaceutical industries, and CS to produce biochar by pyrolysis for biotechnological uses. SL were obtained by acidolysis with caprylic or capric acid, or interesterification with ethyl caprylate or ethyl caprate, in solvent-free media, catalyzed by immobilized sn-1,3 regioselective lipases. Silverskin biochar (BIO) was directly used as enzyme carrier or to produce hybrid organic-silica (HB) supports for enzyme immobilization. Rhizopus oryzae lipase (ROL) immobilized on Amberlite (AMB), silica (SIL), BIO or HB, and the commercial immobilized Thermomyces lanuginosus (Lipozyme TL IM) and Rhizomucor miehei (Lipozyme RM IM) lipases were tested. Lipozyme RM IM showed better results in SL production than Lipozyme TLIM or ROL on BIO, SIL or HB. About 90% triacylglycerol conversion was attained after 7 h acidolysis or interesterification. Lipozyme RM IM was more stable in interesterification (80% and 65% activity with ethyl caprylate or ethyl caprate) than in acidolysis (first-order decay) after 10 reuses.

Production of MLM-Type Structured Lipids Catalyzed by Immobilized Heterologous Rhizopus oryzae Lipase

2010 ◽  
Vol 88 (4) ◽  
pp. 473-480 ◽  
Author(s):  
P. A. Nunes ◽  
P. Pires-Cabral ◽  
M. Guillén ◽  
F. Valero ◽  
D. Luna ◽  
...  
Keyword(s):  
Rhizopus Oryzae ◽  
Structured Lipids ◽  
Rhizopus Oryzae Lipase

scholarly journals Nano-Intermediate of Magnetite Nanoparticles Supported on Activated Carbon from Spent Coffee Grounds for Treatment of Wastewater from Oil Industry and Energy Production

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 63
Author(s):  
Laura Acosta ◽  
Dahiana Galeano-Caro ◽  
Oscar E. Medina ◽  
Farid B. Cortés ◽  
Camilo A. Franco
Keyword(s):  
Activated Carbon ◽  
Crude Oil ◽  
Magnetite Nanoparticles ◽  
Environmental Sustainability ◽  
Packed Bed ◽  
Precipitation Method ◽  
Spent Coffee Grounds ◽  
Coffee Grounds ◽  
Co Precipitation ◽  
By Products

This work focused on evaluating the adsorptive removal of crude oil using a nano-intermediate based on magnetite nanoparticles supported on activated carbon synthesized from spent coffee grounds and the subsequent catalytic oil decomposition to recover by-products and regenerate the support material. The magnetite nanoparticles were synthesized by the co-precipitation method and were used as active phases on prepared activated carbon. The amount of crude oil adsorbed was determined by adsorption isotherms. In addition, dynamic tests were performed on a packed bed to evaluate the efficiency of the removal process. Thermogravimetric analysis and mass spectrometry were used to evaluate the catalytic powder and the quantification of by-products. Contrasting the results with commercial carbon, the one synthesized from the coffee residue showed a greater affinity for the oil. Likewise, the adsorption capacity increased by doping activated carbon with magnetite nanoparticles, obtaining an efficiency greater than 10%. The crude oil decomposition was carried out successfully by thermal cracking, obtaining a 100% removal. The gas produced after decomposition contains light hydrocarbons such as C2H4 and CH4 and shows a decrease in polluting species such as CO and CO2, leading to greater environmental sustainability of the process.

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