scholarly journals Biodiesel Production from Spent Coffee Grounds

2017 ◽  
Vol 25 (40) ◽  
pp. 113-121 ◽  
Author(s):  
Lenka Blinová ◽  
Alica Bartošová ◽  
Maroš Sirotiak
Keyword(s):  
Organic Solvents ◽  
Oil Extraction ◽  
Waste Material ◽  
Biodiesel Production ◽  
Spent Coffee Grounds ◽  
Drying Oil ◽  
Biodiesel Feedstock ◽  
Coffee Grounds ◽  
Coffee Oil

Abstract The residue after brewing the spent coffee grounds is an oil-containing waste material having a potential of being used as biodiesel feedstock. Biodiesel production from the waste coffee grounds oil involves collection and transportation of coffee residue, drying, oil extraction, and finally production of biodiesel. Different methods of oil extraction with organic solvents under different conditions show significant differences in the extraction yields. In the manufacturing of biodiesel from coffee oil, the level of reaction completion strongly depends on the quality of the feedstock oil. This paper presents an overview of oil extraction and a method of biodiesel production from spent coffee grounds.

scholarly journals A Comparative Study on Thermochemical Valorization Routes for Spent Coffee Grounds

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3840
Author(s):  
Jie Yang ◽  
Hao Chen ◽  
Haibo Niu ◽  
Josiah McNutt ◽  
Quan He
Keyword(s):  
Oil Extraction ◽  
Hydrothermal Liquefaction ◽  
Biodiesel Production ◽  
Optimal Conditions ◽  
Spent Coffee Grounds ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Coffee Grounds ◽  
Biodiesel Synthesis ◽  
Biochemical Compositions

Extracting oil from spent coffee grounds (SCG) for biodiesel production has recently attracted much research interest. Large amounts of organic solvents are involved for oil extraction and biodiesel synthesis. Hydrothermal liquefaction (HTL) is an emerging thermochemical technology with great potential for biocrude production from a broad range of feedstocks. This study attempted to compare two SCG valorization options: route 1, oil extraction for biodiesel production followed by HTL of defatted SCG; and route 2, direct HTL of raw SCG. The microwave-assisted extraction conditions were optimized to effectively remove oil from SCG using response surface methodology. Under optimal conditions, an SCG oil yield of 8.4 wt.% could be achieved. HTL of defatted SCG generated less biocrude (18.9 wt.%) than that of raw SCG (28.1 wt.%). The biochemical compositions of resultant biocrudes were largely different from each other. The life cycle assessment was conducted on each of the SCG valorization routes and showed that the greenhouse gas emissions from direct HTL of raw SCG were only 35% of the other valorization route, suggesting that direct HTL is a favorable valorization route for SCG within this study’s scope.

Potential biodiesel production from Brazilian plant oils and spent coffee grounds by Beauveria bassiana lipase 1 expressed in Aspergillus nidulans A773 using different agroindustry inputs

2020 ◽  
Vol 256 ◽  
pp. 120513 ◽  
Author(s):  
Enrico Cerioni Spiropulos Gonçalves ◽  
Malena Martínez Pérez ◽  
Ana Claudia Vici ◽  
Jose Carlos Santos Salgado ◽  
Mariana de Souza Rocha ◽  
...  
Keyword(s):  
Aspergillus Nidulans ◽  
Beauveria Bassiana ◽  
Biodiesel Production ◽  
Plant Oils ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

Biodiesel production by direct transesterification of wet spent coffee grounds using switchable solvent as a catalyst and solvent

2020 ◽  
Vol 296 ◽  
pp. 122334 ◽  
Author(s):  
Hoang Chinh Nguyen ◽  
My Linh Nguyen ◽  
Fu-Ming Wang ◽  
Horng-Yi Juan ◽  
Chia-Hung Su
Keyword(s):  
Biodiesel Production ◽  
Spent Coffee Grounds ◽  
Direct Transesterification ◽  
Coffee Grounds
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