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Rajesh Banu J, Kavitha S, Yukesh Kannah R, Dinesh Kumar M, Atabani AE, Kumar G. Biorefinery of spent coffee grounds waste: Viable pathway towards circular bioeconomy. BIORESOURCE TECHNOLOGY 2020; 302:122821. [PMID: 32008862 DOI: 10.1016/j.biortech.2020.122821] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
The circular bioeconomy plan is an innovative research based scheme intended for augmenting the complete utilization and management of bio-based resources in a sustainable biorefinery route. Spent coffee grounds based biorefinery is the emerging aspect promoting circular bioeconomy. The sustainable circular bioeconomy by utilizing SCG is achieved by cascade approaches and the inclusion of many biorefinery approaches to obtain many bio-products. The maximum energy recovery can be obtained by process integration. The economic analysis of the biofuel production from SCG is dependent on the cost of raw material, transportation, the need of labor and energy, oil extraction operations and biofuel production. The inclusion of new products from already established product can minimize the investment cost when related to the production cost. A positive net present value can be achieved via SCG biorefinery which indicates the profitability of the process.
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Affiliation(s)
- J Rajesh Banu
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli, India
| | - S Kavitha
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli, India
| | - R Yukesh Kannah
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli, India
| | - M Dinesh Kumar
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli, India
| | - A E Atabani
- Alternative Fuels Research Laboratory (AFRL), Energy Division, Department of Mechanical Engineering, Faculty of Engineering, Erciyes University, Kayseri 38039, Turkey
| | - Gopalakrishnan Kumar
- Green Processing, Bioremediation and Alternative Energies Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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52
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Cho DW, Park J, Kwon G, Lee J, Yim GJ, Jung W, Cheong YW. Zirconia-Assisted Pyrolysis of Coffee Waste in CO 2 Environment for the Simultaneous Production of Fuel Gas and Composite Adsorbent. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121989. [PMID: 31896001 DOI: 10.1016/j.jhazmat.2019.121989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/12/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
This work newly employed monoclinic zirconia (ZrO2) as a promoter to improve CO2 pyrolysis of coffee waste (CW). The CO2 pyrolysis of CW presented the high level of CO production (14.3 mol%) during two stages of non-isothermal (280 to 700 °C) and isothermal pyrolysis (kept at 700 °C). At the same condition, the incorporation of ZrO2 improved the CO generation up to about twice that of CW (29.5 mol%) by possibly inducing more conversion of pyrolytic oil into gas. The characterization results exhibited that ZrO2-impregnated biochar (ZrB) possessed the distinctive surface morphology that highly graphitic- and porous carbon layers were covered by ZrO2 nanoparticle clusters. In a series of adsorption experiments, ZrB composite showed pH-dependent As(V) adsorption and pH neutralization ability. The adsorption proceeded relatively rapid with 95% removal during 120 min in the early stage, followed by 5% removal in the remaining 240 min. The maximum adsorption capacity was found to be 25.2 mg g-1 at final pH 8. The reusability and stability of ZrB were demonstrated in the 6 consecutive cycles of adsorption/desorption. As a result, ZrO2-assisted CO2 pyrolysis can potentially produce fuel gas with high CO fraction and composite adsorbent suitable for As(V) removal in acidic wastewater.
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Affiliation(s)
- Dong-Wan Cho
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Jihyun Park
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Gihoon Kwon
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Joonhak Lee
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Gil-Jae Yim
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Woosik Jung
- Environmental and Plant Engineering Research Institute, Korea Institute of Civil and Building Technology, Goyang, Gyeonggi, Republic of Korea.
| | - Young-Wook Cheong
- Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea.
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53
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Waste-based biosorbents as cost-effective alternatives to commercial adsorbents for the retention of fluoxetine from water. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116139] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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54
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Reuse of spent espresso coffee as sustainable source of fibre and antioxidants. A map on functional, microstructure and sensory effects of novel enriched muffins. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108877] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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55
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Chemistry and energy beyond fossil fuels. A perspective view on the role of syngas from waste sources. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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56
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Vakalis S, Moustakas K, Benedetti V, Cordioli E, Patuzzi F, Loizidou M, Baratieri M. The "COFFEE BIN" concept: centralized collection and torrefaction of spent coffee grounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:35473-35481. [PMID: 31065982 DOI: 10.1007/s11356-019-04919-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
Spent 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. Both strategies have significant potential but have also some disadvantages (extensive pre-treatment, high costs) when applied on a large scale. This study highlights the lack of mild pyrolysis valorization strategies and presents the idea of the "COFFEE BIN." Separated spent coffee grounds are collected, dried, and thermally treated. The optimal pyrolysis conditions were identified and product characteristics and the mass balances were assessed. Elemental analysis, thermogravimetric analysis, physisorption analysis and higher heating value (HHV) determination was performed for the characterization of the carbonaceous products. The torrefied coffee grounds returned solid yields from 78 to 83%, which are significantly higher than in other cases of conventional biomass and heating values of 24-25 MJ/kg. Higher temperature pyrolysis did not sustain the advantage of increased returned mass yields and the adsorbance potential of all the carbonaceous products was lower than 25 cm3/g. The study highlighted that spent coffee grounds-due to the nature of their production process via roasting-can be suitable for torrefaction because of the high recovered solid yield and the high energy density. The results will be used for the development of a collection scheme for spent coffee grounds in a big municipality of Athens (Greece).
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Affiliation(s)
- Stergios Vakalis
- Faculty of Science and Technology, Technical Physics Group/Bioenergy and Biofuels Laboratory, Free University of Bozen-Bolzano, Piazza Università 5, IT-39100, Bolzano, Italy.
- School of Chemical Engineering, Unit of Environmental Science and Technology, National Technical University of Athens, 9 Iroon Polytechniou Str, GR-15780, Athens, Greece.
| | - Konstantinos Moustakas
- School of Chemical Engineering, Unit of Environmental Science and Technology, National Technical University of Athens, 9 Iroon Polytechniou Str, GR-15780, Athens, Greece
| | - Vittoria Benedetti
- Faculty of Science and Technology, Technical Physics Group/Bioenergy and Biofuels Laboratory, Free University of Bozen-Bolzano, Piazza Università 5, IT-39100, Bolzano, Italy
| | - Eleonora Cordioli
- Faculty of Science and Technology, Technical Physics Group/Bioenergy and Biofuels Laboratory, Free University of Bozen-Bolzano, Piazza Università 5, IT-39100, Bolzano, Italy
| | - Francesco Patuzzi
- Faculty of Science and Technology, Technical Physics Group/Bioenergy and Biofuels Laboratory, Free University of Bozen-Bolzano, Piazza Università 5, IT-39100, Bolzano, Italy
| | - Maria Loizidou
- School of Chemical Engineering, Unit of Environmental Science and Technology, National Technical University of Athens, 9 Iroon Polytechniou Str, GR-15780, Athens, Greece
| | - Marco Baratieri
- Faculty of Science and Technology, Technical Physics Group/Bioenergy and Biofuels Laboratory, Free University of Bozen-Bolzano, Piazza Università 5, IT-39100, Bolzano, Italy
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57
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The Role of ICT in Supporting Spent Coffee Grounds Collection and Valorization: A Quantitative Assessment. SUSTAINABILITY 2019. [DOI: 10.3390/su11236572] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
As never before, there is nowadays the will to consider alternative energy sources from renewable and waste materials so as to preserve planet and society. One of the possible elements suitable for this purpose is every day in our houses: Coffee. Or rather, spent coffee grounds. Indeed, many studies in recent years have addressed its potential exploitation, especially for biodiesel production; recent works also pointed out its possible thermal valorization for industrial processes. In light of this, this paper proposes a new sustainable use of spent coffee grounds, converted into combustible pellets; this source can then be used not only for industrial heaters, but also for public or private buildings. To this end, a feasibility study of a pellet production plant fed by waste collected by vending companies operating in the North of Italy is developed, including the logistic model supported by an Information and Communication Technology (ICT) system to help gather spent coffee grounds from the different companies and collect them into the pellet production facility.
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58
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Massaya J, Prates Pereira A, Mills-Lamptey B, Benjamin J, Chuck CJ. Conceptualization of a spent coffee grounds biorefinery: A review of existing valorisation approaches. FOOD AND BIOPRODUCTS PROCESSING 2019. [DOI: 10.1016/j.fbp.2019.08.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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59
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The Optimized Production of 5-(Hydroxymethyl)furfural and Related Products from Spent Coffee Grounds. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9163369] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The increasing consumption of coffee worldwide has led to higher amounts of spent coffee grounds (SCG) being produced which are generally disposed of in landfill or used as compost. However, the wide range of molecules present in SCG such as saccharides, lignin, lipids and proteins give this biomass source a large chemical functionality. In this work, SCG were fractionated to separate the components into three separate portions for further valorization; these were hemicellulose-enriched fractions (HEF), lignin-enriched fraction (LEF) and cellulose-enriched fraction (CEF). HEF was effectively used in the growth of the oleaginous yeast Metschnikowia pulcherrima, additionally, the C6 sugars present in this fraction suggests that it can be used in the production of 5-hydroxymethylfurfural (HMF). The LEF had a considerable high heating value (HHV) and would be suitable as a biofuel component for combustion. CEF was efficiently used in the production of HMF as 0.35 g of this product were obtained from 10 g of SCG. Such results demonstrate that SCG can be effectively used in the production of HMF within a biorefinery concept.
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60
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Koo B, Park J, Gonzalez R, Jameel H, Park S. Two-stage autohydrolysis and mechanical treatment to maximize sugar recovery from sweet sorghum bagasse. BIORESOURCE TECHNOLOGY 2019; 276:140-145. [PMID: 30623868 DOI: 10.1016/j.biortech.2018.12.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/27/2018] [Accepted: 12/29/2018] [Indexed: 06/09/2023]
Abstract
Modified autohydrolysis combined with mechanical refining has been suggested to recover free sugars from sweet sorghum bagasse and facilitates enzyme access to cellulose in bagasse for enhancing its conversion to fermentable sugars. The amount of total available sugars in sweet sorghum bagasse was found to be 76.1% and this value was used to evaluate the efficiency of the process suggested. Total sugar recovery was achieved up to 68.1% through the single-stage autohydrolysis at 170 °C for 60 min, followed by mechanical refining and enzymatic hydrolysis; however, the sugar recovery through partial degradation of free sugars induced by high-temperature autohydrolysis was lower than expected. A modified two-stage autohydrolysis was suggested to prevent sugar degradation and the total sugar recovery using this process reached 83.9% of total available sugars in sweet sorghum bagasse.
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Affiliation(s)
- Bonwook Koo
- Intelligent & Sustainable Materials R&D Group, Korea Institute of Industrial Technology (KITECH), Cheonan-si 31056, Republic of Korea
| | - Junyeong Park
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, USA
| | - Ronalds Gonzalez
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, USA
| | - Hasan Jameel
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, USA
| | - Sunkyu Park
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, USA.
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61
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Pettinato M, Casazza AA, Perego P. The role of heating step in microwave-assisted extraction of polyphenols from spent coffee grounds. FOOD AND BIOPRODUCTS PROCESSING 2019. [DOI: 10.1016/j.fbp.2019.01.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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62
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Centi G, Iaquaniello G, Perathoner S. Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production. ACTA ACUST UNITED AC 2019. [DOI: 10.1186/s42480-019-0006-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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63
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Nguyen QA, Cho EJ, Lee DS, Bae HJ. Development of an advanced integrative process to create valuable biosugars including manno-oligosaccharides and mannose from spent coffee grounds. BIORESOURCE TECHNOLOGY 2019; 272:209-216. [PMID: 30340187 DOI: 10.1016/j.biortech.2018.10.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/04/2018] [Accepted: 10/05/2018] [Indexed: 06/08/2023]
Abstract
Spent coffee grounds (SCG) or coffee residue wastes (CRW) provide excellent raw material for mannose and bioethanol production. In this study, SCG were used to produce valuable biosugars, including oligosaccharides (OSs), manno-oligosaccharides (MOSs), mannose, and bioethanol. SCG were subjected to delignification and defatting, producing SCG-derived polysaccharides. Two-stage enzymatic hydrolysis (short- and long-term) was performed to produce short-chain manno-oligosaccharides (MOSs) and monosaccharides (MSs), respectively. From 100 g dry weight (DW) amounts of SCG, approximately 77 g delignified SCG and 61 g SCG-derived polysaccharides, amounts of 15.9 g of first biosugars (mostly MOSs), 25.6 g of second biosugars (mostly MSs), and 3.1 g of bioethanol, were recovered. This technique may aid in the production of high-value mannose and OSs from SCG and other lignocellulosic biomasses that contain specific polysaccharides.
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Affiliation(s)
- Quynh Anh Nguyen
- Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Eun Jin Cho
- Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Dae-Seok Lee
- Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Hyeun-Jong Bae
- Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
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64
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Stylianou M, Agapiou A, Omirou M, Vyrides I, Ioannides IM, Maratheftis G, Fasoula D. Converting environmental risks to benefits by using spent coffee grounds (SCG) as a valuable resource. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:35776-35790. [PMID: 29860699 DOI: 10.1007/s11356-018-2359-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Coffee is perhaps one of the most vital ingredients in humans' daily life in modern world. However, this causes the production of million tons of relevant wastes, i.e., plastic cups, aluminum capsules, coffee chaff (silver skin), and spent coffee grounds (SCG), all thrown untreated into landfills. It is estimated that 1 kg of instant coffee generates around 2 kg of wet SCG; a relatively unique organic waste stream, with little to no contamination, separated directly in the source by the coffee shops. The produced waste has been under researchers' microscope as a useful feedstock for a number of promising applications. SCG is considered a valuable, nutrients rich source of bioactive compounds (e.g., phenolics, flavonoids, carotenoids, lipids, chlorogenic and protocatechuic acid, melanoidins, diterpenes, xanthines, vitamin precursors, etc.) and a useful resource material in other processes (e.g., soil improver and compost, heavy metals absorbent, biochar, biodiesel, pellets, cosmetics, food, and deodorization products). This paper aims to provide a holistic approach for the SCG waste management, highlighting a series of processes and applications in environmental solutions, food industry, and agricultural sector. Thus, the latest developments and approaches of SCG waste management are reviewed and discussed.
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Affiliation(s)
- Marinos Stylianou
- NIREAS-International Research Center, Department of Civil and Environmental Engineering, University of Cyprus, P.O. Box 20537, CY-1678, Nicosia, Cyprus.
| | - Agapios Agapiou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, CY-1678, Nicosia, Cyprus
| | - Michalis Omirou
- Agricultural Research Institute, P.O. Box 22016, CY-1516, Nicosia, Cyprus
| | - Ioannis Vyrides
- Department of Environmental Science and Technology, Cyprus University of Technology, 30 Archbishop Kyprianos, CY-3036, Lemesos, Cyprus
| | | | - Grivas Maratheftis
- Agricultural Research Institute, P.O. Box 22016, CY-1516, Nicosia, Cyprus
| | - Dionysia Fasoula
- Agricultural Research Institute, P.O. Box 22016, CY-1516, Nicosia, Cyprus
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65
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Cho DW, Tsang DCW, Kim S, Kwon EE, Kwon G, Song H. Thermochemical conversion of cobalt-loaded spent coffee grounds for production of energy resource and environmental catalyst. BIORESOURCE TECHNOLOGY 2018; 270:346-351. [PMID: 30243241 DOI: 10.1016/j.biortech.2018.09.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/07/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
Thermochemical conversion of cobalt (Co)-loaded lignin-rich spent coffee grounds (COSCG) was carried out to find the appropriate pyrolytic conditions (atmospheric gas and pyrolytic time) for syngas production (H2 and CO) and fabricate Co-biochar catalyst (CBC) in one step. The use of CO2 as atmospheric gas and 110-min pyrolytic time was optimal for generation of H2 (∼1.6 mol% in non-isothermal pyrolysis for 50 min) and CO (∼4.7 mol% in isothermal pyrolysis for 60 min) during thermochemical process of COSCG. The physicochemical properties of CBC fabricated using optimized pyrolytic conditions for syngas production were scrutinized using various analytical instruments (FE-SEM, TEM, XRD, and XPS). The characterizations exhibited that the catalyst consisted of metallic Co and surface wrinkled carbon layers. As a case study, the catalytic capability of CBC was tested by reducing p-nitrophenol (PNP), and the reaction kinetics of PNP in the presence of CBC was measured from 0.04 to 0.12 s-1.
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Affiliation(s)
- Dong-Wan Cho
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Sohyun Kim
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Eilhann E Kwon
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Gihoon Kwon
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Hocheol Song
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea.
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66
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Combined antioxidant-biofuel production from coffee silverskin. Appl Microbiol Biotechnol 2018; 103:1021-1029. [DOI: 10.1007/s00253-018-9530-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/07/2018] [Accepted: 11/17/2018] [Indexed: 02/06/2023]
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67
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Iaquaniello G, Centi G, Salladini A, Palo E, Perathoner S. Waste to Chemicals for a Circular Economy. Chemistry 2018; 24:11831-11839. [DOI: 10.1002/chem.201802903] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 06/24/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Gaetano Iaquaniello
- Processi Innovativi Via di Vannina 88– 00156 Roma Italy
- KT–Kinetics Technology S.p.A Viale Castello della Magliana 27 00148 Rome Italy
| | - Gabriele Centi
- Dept. MIFT–Industrial Chemistry, ERIC aisbl and INSTM/CASPEUniversity of Messina V.le F. Stagno D'Alcontres 31– 98166 Messina Italy
| | | | - Emma Palo
- KT–Kinetics Technology S.p.A Viale Castello della Magliana 27 00148 Rome Italy
| | - Siglinda Perathoner
- Dept. ChiBioFarAm–Industrial ChemistryUniversity of Messina V.le F. Stagno D'Alcontres 31– 98166 Messina Italy
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68
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Hudeckova H, Neureiter M, Obruca S, Frühauf S, Marova I. Biotechnological conversion of spent coffee grounds into lactic acid. Lett Appl Microbiol 2018; 66:306-312. [PMID: 29330879 DOI: 10.1111/lam.12849] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/25/2017] [Accepted: 01/06/2018] [Indexed: 11/28/2022]
Abstract
This 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 l-1 arabinose) and it was used as a substrate for culturing several lactic acid bacteria (LAB) and LA-producing Bacillus coagulans. Among the screened micro-organisms, Lactobacillus rhamnosus CCM 1825 was identified as the most promising producer of LA on a SCG hydrolysate. Despite the inhibitory effect exerted by furfural and phenolic compounds in the medium, reasonably high LA concentrations (25·69 ± 1·45 g l-1 ) and yields (98%) were gained. Therefore, it could be demonstrated that SCG is a promising raw material for the production of LA and could serve as a feedstock for the sustainable large-scale production of LA. SIGNIFICANCE AND IMPACT OF THE STUDY Spent coffee grounds (SCG) represent solid waste generated in millions of tonnes by coffee-processing industries. Their disposal represents a serious environmental problem; however, SCG could be valorized within a biorefinery concept yielding various valuable products. Herein, we suggest that SCG can be used as a complex carbon source for the lactic acid production.
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Affiliation(s)
- H Hudeckova
- Institute of Food Science and Biotechnology, Faculty of Chemistry, Brno University of Technology, Brno, Czech Republic.,Materials Research Centre, Brno University of Technology, Brno, Czech Republic
| | - M Neureiter
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences, Vienna, Tulln, Austria
| | - S Obruca
- Institute of Food Science and Biotechnology, Faculty of Chemistry, Brno University of Technology, Brno, Czech Republic.,Materials Research Centre, Brno University of Technology, Brno, Czech Republic
| | - S Frühauf
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences, Vienna, Tulln, Austria
| | - I Marova
- Institute of Food Science and Biotechnology, Faculty of Chemistry, Brno University of Technology, Brno, Czech Republic.,Materials Research Centre, Brno University of Technology, Brno, Czech Republic
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