SPENT COFFEE GROUNDS FROM COFFEE VENDING MACHINES AS FEEDSTOCK FOR BIOGAS PRODUCTION

2018 ◽  
Vol 17 (10) ◽  
pp. 2401-2408 ◽  
Author(s):  
Rosa Marchetti ◽  
Ciro Vasmara
Keyword(s):  
Biogas Production ◽  
Spent Coffee Grounds ◽  
Vending Machines ◽  
Coffee Grounds

scholarly journals On the Spent Coffee Grounds Biogas Production

2016 ◽  
Vol 64 (4) ◽  
pp. 1279-1282 ◽  
Author(s):  
Tomáš Vítěz ◽  
Tomáš Koutný ◽  
Martin Šotnar ◽  
Jan Chovanec
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Chemical Composition ◽  
Fermentation Process ◽  
Biogas Production ◽  
Processing Waste ◽  
Spent Coffee Grounds ◽  
Input Material ◽  
Coffee Grounds ◽  
The World

Due to the strict legislation currently in use for landfilling, anaerobic digestion has a strong potential as an alternative treatment for biodegradable waste. Coffee is one of the most consumed beverages in the world and spent coffee grounds (SCG) are generated in a considerable amount as a processing waste during making the coffee beverage. Chemical composition of SCG, presence of polysaccharides, proteins, and minerals makes from the SCG substrates with high biotechnological value, which might be used as valuable input material in fermentation process. The methane production ranged from 0.271–0.325 m3/kg dry organic matter.

Anaerobic Co-digestion of Pig Manure and Spent Coffee Grounds for Enhanced Biogas Production

2019 ◽  
Vol 11 (9) ◽  
pp. 4613-4620 ◽  
Author(s):  
A. Orfanoudaki ◽  
G. Makridakis ◽  
A. Maragkaki ◽  
M. S. Fountoulakis ◽  
N. G. Kallithrakas-Kontos ◽  
...  
Keyword(s):  
Biogas Production ◽  
Pig Manure ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

Anaerobic co-digestion of spent coffee grounds with different waste feedstocks for biogas production

2017 ◽  
Vol 60 ◽  
pp. 322-328 ◽  
Author(s):  
Jaai Kim ◽  
Hakchan Kim ◽  
Gahyun Baek ◽  
Changsoo Lee
Keyword(s):  
Biogas Production ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

scholarly journals Performance Optimisation of Fuel Pellets Comprising Pepper Stem and Coffee Grounds through Mixing Ratios and Torrefaction

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4667
Author(s):  
Sunyong Park ◽  
Hui-Rim Jeong ◽  
Yun-A Shin ◽  
Seok-Jun Kim ◽  
Young-Min Ju ◽  
...  
Keyword(s):  
Calorific Value ◽  
Basic Information ◽  
Spent Coffee Grounds ◽  
Mixing Ratios ◽  
Moisture Contents ◽  
Fuel Pellets ◽  
Coffee Grounds ◽  
Coffee Ground ◽  
Fuel Characteristics ◽  
By Products

Agricultural by-products have several disadvantages as fuel, such as low calorific values and high ash contents. To address these disadvantages, this study examined the mixing of agricultural by-products and spent coffee grounds, for use as a solid fuel, and the improvement of fuel characteristics through torrefaction. Pepper stems and spent coffee grounds were first dried to moisture contents of <15% and then combined, with mixing ratios varying from 9:1 to 6:4. Fuel pellets were produced from these mixtures using a commercial pelletiser, evaluated against various standards, and classified as grade A, B, or Bio-SRF. The optimal ratio of pepper stems to spent coffee grounds was determined to be 8:2. The pellets were torrefied to improve their fuel characteristics. Different torrefaction temperatures improved the mass yields of the pellets to between 50.87% and 88.27%. The calorific value increased from 19.9% to 26.8% at 290 °C. The optimal torrefaction temperature for coffee ground pellets was 230 °C, while for other pellets, it was 250 °C. This study provides basic information on the potential enhancement of agricultural by-products for fuel applications.

scholarly journals Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 494 ◽  
Author(s):  
Kang Hyun Lee ◽  
Ye Won Jang ◽  
Jeongho Lee ◽  
Seunghee Kim ◽  
Chulhwan Park ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Enzymatic Hydrolysis ◽  
Lactic Acid Production ◽  
Complex Loading ◽  
Lactic Acid Fermentation ◽  
Optimum Conditions ◽  
Spent Coffee Grounds ◽  
Alkali Pretreatment ◽  
Acid Fermentation ◽  
Coffee Grounds

Biorefinery, which utilizes carbon-neutral biomass as a resource, is attracting attention as a significant alternative in a modern society confronted with climate change. In this study, spent coffee grounds (SCGs) were used as the feedstock for lactic acid fermentation. In order to improve sugar conversion, alkali pretreatment was optimized by a statistical method, namely response surface methodology (RSM). The optimum conditions for the alkali pretreatment of SCGs were determined as follows: 75 °C, 3% potassium hydroxide (KOH) and a time of 2.8 h. The optimum conditions for enzymatic hydrolysis of pretreated SCGs were determined as follows: enzyme complex loading of 30-unit cellulase, 15-unit cellobiase and 50-unit mannanase per g biomass and a reaction time of 96 h. SCG hydrolysates were used as the carbon source for Lactobacillus cultivation, and the conversions of lactic acid by L. brevis ATCC 8287 and L. parabuchneri ATCC 49374 were 40.1% and 55.8%, respectively. Finally, the maximum lactic acid production by L. parabuchneri ATCC 49374 was estimated to be 101.2 g based on 1000 g of SCGs through the optimization of alkali pretreatment and enzymatic hydrolysis.

scholarly journals Spent coffee grounds and tea leaf residues: Characterization, evaluation of thermal reactivity and recovery of high-value compounds

2021 ◽  
Vol 150 ◽  
pp. 106141
Author(s):  
Ekaterina Sermyagina ◽  
Clara Lisseth Mendoza Martinez ◽  
Markku Nikku ◽  
Esa Vakkilainen
Keyword(s):  
Spent Coffee Grounds ◽  
Thermal Reactivity ◽  
Coffee Grounds ◽  
Tea Leaf

scholarly journals Effect of Processed Beverage By-Product-Based Diets on Biological Parameters, Conversion Efficiency and Body Composition of Hermetia illucens (L) (Diptera: Stratiomyidae)

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 475
Author(s):  
Vassilios Sideris ◽  
Maria Georgiadou ◽  
Georgios Papadoulis ◽  
Konstantinos Mountzouris ◽  
Antonios Tsagkarakis
Keyword(s):  
Body Composition ◽  
Crude Protein ◽  
Larval Density ◽  
Mass Reduction ◽  
Spent Coffee Grounds ◽  
Hermetia Illucens ◽  
Protein Levels ◽  
Spent Grains ◽  
Coffee Grounds ◽  
By Products

The effect of spent coffee grounds (SCG), brewer’s spent grains (BSG) and their mixtures with the addition of brewer’s yeast (BY) were tested in two rearing densities of the Black Soldier Fly, Hermetia illucens (L.). Different treatments were investigated on larval development, survival, yield, protein conversion (PrCR) and bioconversion rate (BCR), substrate mass reduction and body composition of the insect. BSF larvae were able to develop sufficiently in all diets, except on sole SCG. The addition of BY enhanced the performance properties of diets, especially in the case of SCG, where larvae underperformed. Substrate mass reduction, PrCR and BCR were affected only by feed and exhibited higher values on reference feed, followed by BSG and SCG+BSG enriched with BY. Density did not have a significant effect on various larval nutrients, except for fat, which was higher on larvae fed enriched feeds with BY and in the 300 larval density. The interaction between feed and density strongly affected the nitrogen and protein levels, larval yield and ash. Generally, diets which contained SCG exhibited high larval crude protein levels. Our results illustrate that low value beverage by-products can be successfully utilized as constituents of a successful BSF diet.

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