1
|
Manatura K, Chalermsinsuwan B, Kaewtrakulchai N, Kwon EE, Chen WH. Machine learning and statistical analysis for biomass torrefaction: A review. BIORESOURCE TECHNOLOGY 2023; 369:128504. [PMID: 36538955 DOI: 10.1016/j.biortech.2022.128504] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
Torrefaction is a remarkable technology in biomass-to-energy. However, biomass has several disadvantages, including hydrophilic properties, higher moisture, lower heating value, and heterogeneous properties. Many conventional approaches, such as kinetic analysis, process modeling, and computational fluid dynamics, have been used to explain torrefaction performance and characteristics. However, they may be insufficient in actual applications because of providing only some specific solutions. Machine learning (ML) and statistical approaches are powerful tools for analyzing and predicting torrefaction outcomes and even optimizing the thermal process for its utilization. This state-of-the-art review aims to present ML-assisted torrefaction. Artificial neural networks, multivariate adaptive regression splines, decision tree, support vector machine, and other methods in the literature are discussed. Statistical approaches (SAs) for torrefaction, including Taguchi, response surface methodology, and analysis of variance, are also reviewed. Overall, this review has provided valuable insights into torrefaction optimization, which is conducive to biomass upgrading for achieving net zero.
Collapse
Affiliation(s)
- Kanit Manatura
- Department of Mechanical Engineering, Faculty of Engineering at Kamphaeng Saen, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand
| | - Benjapon Chalermsinsuwan
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330 Thailand
| | - Napat Kaewtrakulchai
- Kasetsart Agricultural and Agro-industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand
| | - Eilhann E Kwon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan.
| |
Collapse
|
2
|
Optimization of the ultrasonic-assisted extraction of trans-resveratrol and its glucoside from grapes followed by UPLC-MS/MS using the response surface methodology. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-021-01236-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
3
|
Barbanera M, Cardarelli A, Carota E, Castellini M, Giannoni T, Ubertini S. Valorization of winery and distillery by-products by hydrothermal carbonization. Sci Rep 2021; 11:23973. [PMID: 34907329 PMCID: PMC8671441 DOI: 10.1038/s41598-021-03501-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/25/2021] [Indexed: 11/09/2022] Open
Abstract
This work aims at finding an alternative strategy to manage the waste generated by the winemaking industry to obtain a solid biofuel and phenolic compounds. The effect of temperature (180-260 °C), residence time (1-7 h), and biomass-to-liquid ratio (0.05-0.25) on the co-hydrothermal carbonization of vine pruning and exhausted grape pomace, by using vinasse as moisture source, is studied. The effect of the variables is investigated and optimized using the Box-Behnken design of response surface methodology to maximize mass yield, fuel ratio, energy densification yield and phenols extraction yield and to minimize energy consumption. The statistical analysis shows that the carbonization temperature is a crucial parameter of the process, decreasing the product yield on one hand and improving the quality of hydrochar on the other. At the optimal conditions (246.3 °C, 1.6 h, 0.066), an hydrochar yield of 52.64% and a calorific value of 24.1 MJ/kg were obtained. Moreover, the analysis of the H/C and O/C ratios of hydrochars demonstrates that carbonisation significantly improves the fuel properties of solid biofuel. Liquid by-products obtained from the HTC process are found to contain high concentrations of organic matter but the BOD/COD ratios suggest their potential valorization by biological methods.
Collapse
Affiliation(s)
- Marco Barbanera
- Department of Economics Engineering Society and Business Organization (DEIM), University of Tuscia, Largo dell'università s.n.c., Loc. Riello, 01100, Viterbo, Italy.
| | - Alessandro Cardarelli
- grid.12597.380000 0001 2298 9743Department of Economics Engineering Society and Business Organization (DEIM), University of Tuscia, Largo dell’università s.n.c., Loc. Riello, 01100 Viterbo, Italy
| | - Eleonora Carota
- grid.12597.380000 0001 2298 9743Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), University of Tuscia, 01100 Viterbo, Italy
| | - Marco Castellini
- grid.12597.380000 0001 2298 9743Department of Economics Engineering Society and Business Organization (DEIM), University of Tuscia, Largo dell’università s.n.c., Loc. Riello, 01100 Viterbo, Italy
| | - Tommaso Giannoni
- grid.9027.c0000 0004 1757 3630CIRIAF—Biomass Research Centre, University of Perugia, Via G. Duranti 63, 06125 Perugia, Italy
| | - Stefano Ubertini
- grid.12597.380000 0001 2298 9743Department of Economics Engineering Society and Business Organization (DEIM), University of Tuscia, Largo dell’università s.n.c., Loc. Riello, 01100 Viterbo, Italy
| |
Collapse
|
4
|
Kashyap D, Das S, Kalita P. Exploring the efficiency and pollutant emission of a dual fuel CI engine using biodiesel and producer gas: An optimization approach using response surface methodology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145633. [PMID: 33582352 DOI: 10.1016/j.scitotenv.2021.145633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 01/28/2021] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
The present study focuses on optimizing the engine operating parameters of a dual-fuel (DF) engine. Producer gas (PG) and Honge oil methyl ester (HOME) are used as primary fuel and pilot fuel respectively for the operation. An experimental design matrix of 20 different combinations was considered using Design of Experiments (DoE), based on the central composite design (CCD) of response surface methodology (RSM). The effects of these combinations were experimentally investigated to calculate the performance and emission characteristics of the engine. The objective of the work is to maximize the Brake thermal efficiency (BTE) and minimize the exhaust gas temperature (EGT), nitrogen oxide (NOx), hydrocarbon (HC), and carbon monoxide (CO) emissions. The RSM model is developed using the experimental data and further, the operating parameters were optimized using the desirability approach. The optimized combination of operating parameters was obtained at 61.10% engine load, compression ratio (CR) of 18, and injection timing (IT) of 23.30° before top dead center (BTDC). The optimum responses corresponding to these operating conditions were found as 14.23%, 354.29 °C, 52.18 ppm, 39.53 ppm, and 0.51% for BTE, EGT, NOx, HC, and CO respectively with an overall desirability of 0.962. The optimized responses were validated experimentally at optimum input conditions and found to be within acceptable error levels. Further, an economic analysis of the optimized DF system is also carried out.
Collapse
Affiliation(s)
- Debangsu Kashyap
- Fuel and Combustion Lab, Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Samar Das
- Fuel and Combustion Lab, Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pankaj Kalita
- Fuel and Combustion Lab, Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| |
Collapse
|
5
|
Improving the Recovery of Phenolic Compounds from Spent Coffee Grounds (SCG) by Environmentally Friendly Extraction Techniques. Molecules 2021; 26:molecules26030613. [PMID: 33503910 PMCID: PMC7865687 DOI: 10.3390/molecules26030613] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/21/2021] [Accepted: 01/21/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to investigate and compare the effects of different extraction techniques (high hydrostatic pressure-assisted extraction (HHPE), ultrasound-assisted extraction (UAE), and classical solvent extraction (CSE)) on phenolic compounds from spent coffee grounds (SCG). Different HHPE parameters (300, 400 and 500 MPa at 25 °C for 5, 10 and 15 min) and UAE parameters (40%, 50%, and 60% amplitude at 25 °C for 5, 10 and 15 min) were used. These techniques were compared with CSE (at 50 °C for 30 min) according to total phenolic content (TPC), antioxidant activity (AA), high-performance liquid chromatography (HPLC), scanning electron microscopy (SEM), and infrared (IR) spectroscopy. The results showed that eco-friendly techniques increased the TPC and AA compared to CSE and morphological changes were verified by SEM results. Furthermore, chlorogenic and caffeic acid were also quantified by using HPLC. Chlorogenic acid was found as the main phenolic compound in spent coffee grounds (SCG). The highest chlorogenic acid was detected as 85.0 ± 0.6 mg/kg FW with UAE at 60% amplitude for 15 min. In brief, for the extraction of phenolic compounds from waste SCG eco-friendly techniques such as HHPE and/or UAE were more convenient than CSE.
Collapse
|
6
|
López-Linares JC, García-Cubero MT, Coca M, Lucas S. Efficient biobutanol production by acetone-butanol-ethanol fermentation from spent coffee grounds with microwave assisted dilute sulfuric acid pretreatment. BIORESOURCE TECHNOLOGY 2021; 320:124348. [PMID: 33190095 DOI: 10.1016/j.biortech.2020.124348] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
The integral valorization of potential sugars (cellulosic and hemicellulosic) from spent coffee grounds (SCG), a lignocellulosic residue, is proposed in this work. With this aim, the microwave assisted dilute sulfuric acid pretreatment has been optimized, leading to a hemicellulosic sugar recovery in the pretreatment liquid (HSRL) and an enzymatic hydrolysis yield of 79 and 98%, respectively, at 160.47 °C and 1.5% H2SO4. Moreover, the complete digestibility of cellulose (enzymatic hydrolysis yield = 100%) was also discovered for non-pretreated SCG, which is very interesting. Secondly, the production of biobutanol, an advanced biofuel, is also proposed from pretreated SCG enzymatic hydrolysate and pretreatment liquid achieved under optimal conditions. These were fermented by Clostridium beijerinckii, yielding 95 kg butanol/t SCG (dry matter) and 151 kg acetone-butanol-ethanol/t SCG (dry matter).
Collapse
Affiliation(s)
- Juan C López-Linares
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - María Teresa García-Cubero
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Mónica Coca
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain
| | - Susana Lucas
- Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
| |
Collapse
|
7
|
Kang K, Nanda S, Lam SS, Zhang T, Huo L, Zhao L. Enhanced fuel characteristics and physical chemistry of microwave hydrochar for sustainable fuel pellet production via co-densification. ENVIRONMENTAL RESEARCH 2020; 186:109480. [PMID: 32302869 DOI: 10.1016/j.envres.2020.109480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/26/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Microwave assisted hydrothermal treatment (MHTC) was compared with torrefaction in terms of carbonization efficiency and physicochemical characteristics of char products. The utilization of produced char was optimized for composite solid biofuel production. The results show that MHTC significantly improved the binding capability of the microwave hydrochar (MHC) particles during co-densification with unprocessed biomass and coal. One possible contributor to the improved binding is the pseudo lignin formed during the MHTC, which led to a better interlocking of the feedstock particles and promoted the solid bridge formation. Composite pellet prepared with 80 wt% of torrefaction char (TC-120), 10 wt% of microwave hydrochar (MHC-30), and 10 wt% of Coal-04 showed a higher heating value of 24.54 MJ/kg and energy density of 26.43 GJ/m3, which is significantly higher than that of the raw cotton stalk pellet (16.77 MJ/kg and 18.76 GJ/m3, respectively), showing great promise as a solid biofuel. The moisture resistance and oxidation reactivity are also significantly improved. The results demonstrate that MHCs provides dual functionalities in acting as binder and fuel promoter in the production of composite biofuel. This study can provide new insight into the unique functions of MHC during fuel application, which demonstrates the great potential of applying MHTC in energy recovery from lignocellulosic biomass.
Collapse
Affiliation(s)
- Kang Kang
- Academy of Agricultural Planning and Engineering, Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China; College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Sonil Nanda
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries (Akuatrop) & Institute of Tropical Biodiversity and Sustainable Development (Bio-D Tropika), Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Terengganu, Malaysia
| | - Tianle Zhang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Lili Huo
- Academy of Agricultural Planning and Engineering, Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China
| | - Lixin Zhao
- Academy of Agricultural Planning and Engineering, Key Laboratory of Energy Resource Utilization from Agriculture Residue, Ministry of Agriculture and Rural Affairs, Beijing, 100125, China.
| |
Collapse
|
8
|
Elkady OA, Tadros MI, El-Laithy HM. QbD Approach for Novel Crosslinker-Free Ionotropic Gelation of Risedronate Sodium-Chitosan Nebulizable Microspheres: Optimization and Characterization. AAPS PharmSciTech 2019; 21:14. [PMID: 31807950 DOI: 10.1208/s12249-019-1561-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 11/07/2019] [Indexed: 01/29/2023] Open
Abstract
Risedronate sodium (RS) is a potent inhibitor of bone resorption, having an extreme poor permeability and limited oral bioavailability (0.62%). RS should be orally administered under fasting conditions while keeping in an upright posture for at least 30 min to diminish common gastroesophageal injuries. To surmount such limitations, novel risedronate-chitosan (RS-CS) crosslinker-free nebulizable microspheres were developed adopting the quality by design (QbD) approach and risk assessment (RA) thinking. RS:CS ratio, surfactant (Pluronic® F127) concentration, homogenization duration, speed, and temperature were identified using Ishikawa diagrams as the highest formulation and process risk factors affecting the critical quality attributes (CQAs), average particle size (PS), and entrapment efficiency (EE%). The risk factors were screened using the Plackett-Burman design, and the levels of the most significant factors were optimized using a multilevel factorial design to explore the optimized system with the least PS, maximum EE%, and a prolonged drug release profile. The optimized system (B6) was developed at a RS:CS ratio of 1:7, a surfactant concentration of 2% (w/v), and a homogenization speed of 14,000 rpm. It revealed good correlation with QbD theoretical prediction, where positively charged (47.9 ± 3.39 mV) discrete, spherical microspheres (3.47 ± 0.16 μm) having a high EE% (94.58 ± 0.19%) and prolonged RS release over 12 h (Q12 h, 89.70 ± 0.64%) were achieved. In vivo lung deposition after intratracheal instillation of B6 confirmed the delivery of high RS percentage to rat lung tissues (87 ± 3.54%) and its persistence for 24 h. This investigation demonstrated the effectiveness of QbD philosophy in developing RS-CS crosslinker-free nebulizable microspheres.
Collapse
Affiliation(s)
- Omar A Elkady
- Department of Pharmaceutics, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza, 11787, Egypt
| | - Mina Ibrahim Tadros
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt.
| | - Hanan M El-Laithy
- Department of Pharmaceutics, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza, 11787, Egypt
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
| |
Collapse
|
9
|
Plante L, Sheehan NP, Bier P, Murray K, Quell K, Ouellette C, Martinez E. Bioenergy from biofuel residues and waste. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1199-1204. [PMID: 31433529 DOI: 10.1002/wer.1214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 06/26/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
This section presents a review of the scientific literature published in 2018 on topics relating to sustainable bioenergy from biofuel residues and waste. This review is divided into the following sections: Feedstocks, Bioethanol, Biodiesel, Biohydrogen, Hydrogen, Biofuel Residues, Microalgae, and Lignocelluloses.
Collapse
Affiliation(s)
- Luke Plante
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Nathaniel P Sheehan
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Peter Bier
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Kyle Murray
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Kimberly Quell
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Charles Ouellette
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| | - Erick Martinez
- Department of Geography and Environmental Engineering, United States Military Academy, West Point, New York
| |
Collapse
|
10
|
Guillemant J, Albrieux F, de Oliveira LP, Lacoue-Nègre M, Duponchel L, Joly JF. Insights from Nitrogen Compounds in Gas Oils Highlighted by High-Resolution Fourier Transform Mass Spectrometry. Anal Chem 2019; 91:12644-12652. [DOI: 10.1021/acs.analchem.9b01702] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Julie Guillemant
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Florian Albrieux
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Luis P. de Oliveira
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Marion Lacoue-Nègre
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Ludovic Duponchel
- Université de Lille, CNRS, UMR 8516 - LASIR − Laboratoire de Spectrochimie Infrarouge et Raman, F-59000 Lille, France
| | - Jean-François Joly
- IFP Energies nouvelles, Rond-point de l’échangeur de Solaize, BP 3, 69360 Solaize, France
| |
Collapse
|
11
|
Jribi S, Molnàr H, Antal OT, Adànyi N, Kheriji O, Naàr Z, Debbabi H. Zinc fortification as a tool for improving sprout hygienic and nutritional quality: a factorial design approach. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:5187-5194. [PMID: 31032927 DOI: 10.1002/jsfa.9765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/23/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Sprouting is known to improve cereal and pulse nutritional properties. However, several outbreaks of illness have been reported after raw sprout consumption. This research aimed to improve wheat sprout hygienic properties through the use of zinc diacetate. Sprouting conditions (sprouting temperature, soaking time and zinc diacetate solution concentration) were optimized to decrease total plate count, coliforms, and molds and yeasts using a factorial design approach and a desirability function. RESULTS Based on the responses, the effects of variables were calculated and the interactions between them were determined. Optimal conditions were defined as follows: sprouting temperature 18 °C, soaking time 0.66 h and zinc diacetate concentration 400 mg L-1 . These conditions led to the elimination of coliforms and a decrease in total flora count by 2 log. Interestingly, zinc sprouting increased the zinc content of sprouts and improved their nutritional properties. CONCLUSION Results showed that the use of zinc solution is a useful tool to improve sprout hygienic and nutritional properties. © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Sarra Jribi
- National Institute of Agronomy of Tunisia (INAT), Research Unit UR17AGR01 'Valorization of the Tunisian natural and agro-food heritage through innovation', University of Carthage, Tunis, Tunisia
| | - Helga Molnàr
- Food Science Research Institute, National Agricultural Research and Innovation Centre, Budapest, Hungary
| | - Otilia Tamara Antal
- Food Science Research Institute, National Agricultural Research and Innovation Centre, Budapest, Hungary
| | - Nóra Adànyi
- Food Science Research Institute, National Agricultural Research and Innovation Centre, Budapest, Hungary
| | - Oussema Kheriji
- National Institute of Cereal crops (INGC), Bou Salem, Tunisia
| | - Zoltan Naàr
- Food Science Research Institute, National Agricultural Research and Innovation Centre, Budapest, Hungary
| | - Hajer Debbabi
- National Institute of Agronomy of Tunisia (INAT), Research Unit UR17AGR01 'Valorization of the Tunisian natural and agro-food heritage through innovation', University of Carthage, Tunis, Tunisia
| |
Collapse
|
12
|
Ramón-Gonçalves M, Gómez-Mejía E, Rosales-Conrado N, León-González ME, Madrid Y. Extraction, identification and quantification of polyphenols from spent coffee grounds by chromatographic methods and chemometric analyses. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 96:15-24. [PMID: 31376959 DOI: 10.1016/j.wasman.2019.07.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/28/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
A solid-liquid extraction method using ethanol-water mixtures was combined with cLC-DAD, LC-MS/MS and chemometric analyses for establishing the optimum extraction conditions of valuable polyphenols from spent coffee grounds. Chlorogenic and p-coumaric acids were the most abundant polyphenols found, ranging from 0.02 to 4.8 mg g-1 and 0.173-0.50 mg g-1, respectively. In addition, total polyphenol content (9-29 mg GAE g-1 DW), total flavonoid content (11-27 mg QE g-1 DW), total antioxidant activity (0.3-7 mg GAE g-1 DW) and free radical scavenging ability (DPPH assay, 64-927 µg extract g-1 at EC50) of obtained extracts were determined. Response surface methodology allowed obtaining predictive models for the extraction of each individual polyphenol. On the other hand, multifactorial ANOVA was used to establish differences between coffee and spent coffee ground extracts. Principal component analysis was also employed to relate antioxidant activities, total polyphenol and total flavonoid contents with both the polyphenols extracted and the residue coffee type. The overall results suggested that spent coffee grounds could be reused as a promising, inexpensive and natural source of bioactive polyphenols with potential industrial applications, thus minimizing the waste disposal and environmental impact.
Collapse
Affiliation(s)
- Marina Ramón-Gonçalves
- Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Esther Gómez-Mejía
- Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Noelia Rosales-Conrado
- Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain.
| | - María Eugenia León-González
- Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Yolanda Madrid
- Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain
| |
Collapse
|