TY - JOUR
T1 - Valorization of spent coffee grounds into biofuels and value-added products
T2 - Pathway towards integrated bio-refinery
AU - Atabani, A. E.
AU - Al-Muhtaseb, Ala'a H.
AU - Kumar, Gopalakrishnan
AU - Saratale, Ganesh Dattatraya
AU - Aslam, Muhammad
AU - Khan, Hassnain Abbas
AU - Said, Zafar
AU - Mahmoud, Eyas
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Coffee is the second largest traded commodity after petroleum and the second most popular beverage after water. This big industry is believed to generate huge amount of waste with spent coffee grounds (SCGs) represents one of the main by-products. Recycling of such waste to fuels and value-added products through bio-refineries is a promising way to solve the problem of many countries that face daily challenges and heavy cost in waste disposal. This review aims to shadow the light on SCGs recycling potential in which over 230 published papers on SCGs recycling topic were gathered and discussed. Various opportunities to produce biofuels such as biodiesel, biogas, bioethanol, bio-oil and fuel pellets besides value-added products such as bioactive compounds, adsorbents, polymers, nanocomposites, and compost were discussed. Moreover, the potential of membrane technology related to various processes of biorefining, separation and purification in the proposed SCG-integrated biorefinery are presented. Based on the presented review, it is obvious that recycling of SCGs offers many worthwhile options to policymakers that can contribute towards huge financial saving on taxpayers of running and maintaining landfills besides saving the environment from harmful emissions. In conclusion, this review emphasizes that SCG-integrated biorefineries to produce different types of biofuels and value-added products are a very promising approach that shall be economically more scrutinized in the foreseen future.
AB - Coffee is the second largest traded commodity after petroleum and the second most popular beverage after water. This big industry is believed to generate huge amount of waste with spent coffee grounds (SCGs) represents one of the main by-products. Recycling of such waste to fuels and value-added products through bio-refineries is a promising way to solve the problem of many countries that face daily challenges and heavy cost in waste disposal. This review aims to shadow the light on SCGs recycling potential in which over 230 published papers on SCGs recycling topic were gathered and discussed. Various opportunities to produce biofuels such as biodiesel, biogas, bioethanol, bio-oil and fuel pellets besides value-added products such as bioactive compounds, adsorbents, polymers, nanocomposites, and compost were discussed. Moreover, the potential of membrane technology related to various processes of biorefining, separation and purification in the proposed SCG-integrated biorefinery are presented. Based on the presented review, it is obvious that recycling of SCGs offers many worthwhile options to policymakers that can contribute towards huge financial saving on taxpayers of running and maintaining landfills besides saving the environment from harmful emissions. In conclusion, this review emphasizes that SCG-integrated biorefineries to produce different types of biofuels and value-added products are a very promising approach that shall be economically more scrutinized in the foreseen future.
KW - Bio-refinery
KW - Biofuels
KW - Recycling
KW - Spent coffee grounds
KW - Value-added products
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U2 - 10.1016/j.fuel.2019.115640
DO - 10.1016/j.fuel.2019.115640
M3 - Article
AN - SCOPUS:85067855881
SN - 0016-2361
VL - 254
JO - Fuel
JF - Fuel
M1 - 115640
ER -