Results 271 to 280 of about 197,727 (302)
Some of the next articles are maybe not open access.
Anaerobic digestion of spent coffee grounds
Biomass, 1983Anaerobic digestion of spent coffee grounds (3 kg m−3 day−1) with efficient solids recycling achieved 99% conversion of solids and gas yields of 0·54 m3 kg−1 (56–63% methane). Gas production declined steadily over the test period and after 80 days had fallen from an initial value of 1·70 litre litre−1 day−1 to 0·45 or 0·33 litre litre−1 day−1, with or ...
openaire +1 more source
Valorization of spent coffee grounds: A review
Food and Bioproducts Processing, 2018Abstract Spent coffee grounds (SCGs) arise as waste products through the production of instant coffee and coffee brewing. This work reviews the composition of SCGs, the methods used for the isolation of individual compounds present in SCGs, the ways of utilizing SCGs presented in the literature so far, including use of SCGs’ bioactive compounds ...
Kovalcik, Adriana +2 more
openaire +1 more source
Biotechnological conversion of spent coffee grounds into lactic acid
Letters in Applied Microbiology, 2018This work investigates the potential bioconversion of spent coffee grounds (SCG) into lactic acid (LA). SCG were hydrolysed by a combination of dilute acid treatment and subsequent application of cellulase. The SCG hydrolysate contained a considerable amount of reducing sugars (9·02 ± 0·03 g l-1 , glucose; 26·49 ± 0·10 g l-1 galactose and 2·81 ± 0·07 g
H. Hudeckova +4 more
openaire +2 more sources
Deep eutectic solvent-based valorization of spent coffee grounds
Food Chemistry, 2018Spent coffee grounds (SCGs) are viewed as a valuable resource for useful bioactive compounds, such as chlorogenic acids and flavonoids, and we suggest an eco-friendly and efficient valorization method. A series of choline chloride-based deep eutectic solvents (DESs) were tested as green extraction solvents for use with ultrasound-assisted extraction ...
Da Eun Yoo +5 more
openaire +2 more sources
Active biocatalyst for biodiesel production from spent coffee ground
Bioresource Technology, 2018Physical adsorption preserving activity and support reusability was used to directly bond lipase from Thermomyces lanuginosus on citric acid (CA) modified Fe3O4/Au magnetic nanoparticles. A new faster approach has been used for CA ligand exchange, which ensures an high payload of stable enzyme.
Sarno, Maria, Iuliano, Mariagrazia
openaire +2 more sources
Co-liquefaction of spent coffee grounds and lignocellulosic feedstocks
Bioresource Technology, 2017Co-liquefaction of spent coffee grounds (SCG) with paper filter (PF), corn stalk (CS) and white pine bark (WPB) respectively, was examined in subcritical water for bio-crude oil production. The optimum reaction temperature was 250°C, and the mixing biomass ratio was 1:1.
Linxi, Yang +5 more
openaire +2 more sources
The “COFFEE BIN” concept: centralized collection and torrefaction of spent coffee grounds
Environmental Science and Pollution Research, 2019Spent coffee grounds are the moist solid residues of coffee brewing and in most cases, the disposal is done without any intermediate valorization actions for materials and energy recovery. State-of-the-art applications include extraction of the liquids and application of high-temperature pyrolysis.
Vakalis S +6 more
openaire +3 more sources
Bioadsorbent nanocellulose aerogel efficiency impregnated with spent coffee grounds
International Journal of Biological MacromoleculesDue to growing environmental concerns for better waste management, this study proposes developing a composite aerogel using cellulose nanofibers (CNF) and spent coffee grounds (SCG) through an eco-friendly method for efficient methylene blue (MB) adsorption.
Azfaralariff, Ahmad +5 more
openaire +2 more sources
Preparation of Eco-Friendly Coffee Scrub from Spent Coffee Grounds
The increasing demand for natural products has driven significant interest in utilizing waste materials as primary ingredients in the cosmetic industry. With the rising global consumption of coffee, the accumulation of spent coffee grounds has become a growing environmental concern.Nur Anis Aqilah Mohd Fairudz +4 more
openaire +1 more source