1
|
Pandey AK, Negi S. Enhanced ethanol production using hydrophobic resin detoxified Pine forest litter hydrolysate and integrated fermentation process development supplementing molasses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-30185-5. [PMID: 37801246 DOI: 10.1007/s11356-023-30185-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 09/26/2023] [Indexed: 10/07/2023]
Abstract
Globally escalating ethanol demand necessitates the use of hybrid technologies integrating first- and second-generation biofuel feedstocks for achieving the futuristic targets of gasoline replacement with bioethanol. In present study, an optimized two-step sequential pre-treatment (first dilute alkali, then dilute acid) of Pine forest litter (PFL) was developed. Furthermore, the saccharification of pre-treated PFL was optimized through Response Surface Methodology using Box-Behnken Design, wherein 0.558 g/g of reducing sugar was released under the optimized conditions (12.5% w/v of biomass loading, 10 FPU/g of PFL enzyme loading, 0.15% v/v Tween-80 and 48 h incubation time). Moreover, during hydrolysate fermentation using Saccharomyces cerevisiae NCIM 3288 strain, 22.51 ± 1.02 g/L ethanol was produced. Remarkably, hydrophobic resin (XAD-4) treatment of PFL hydrolysate, significantly removed inhibitors (Furfural, 5-hydroxymethylfurfural and phenolics) and increased ethanol production to 27.38 ± 1.18 g/L. Furthermore, during fermentation of molasses supplemented PFL hydrolysate (total initial sugar: 100 ± 3.27 g/L), a maximum of 46.02 ± 2.08 g/L ethanol was produced with 0.482 g/g yield and 1.92 g/l/h productivity. These findings indicated that the integration of molasses to lignocellulosic hydrolysate, would be a promising hybrid technology for industrial ethanol production within existing bio-refinery infrastructure.
Collapse
Affiliation(s)
- Ajay Kumar Pandey
- Department of Life Sciences and Biotechnology, Chhatrapati Shahu Ji Maharaj University, Kanpur, Kanpur, 208024, Uttar Pradesh, India.
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, 211004, Uttar Pradesh, India.
| | - Sangeeta Negi
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, 211004, Uttar Pradesh, India
| |
Collapse
|
2
|
Zhao T, Tashiro Y, Sonomoto K. Smart fermentation engineering for butanol production: designed biomass and consolidated bioprocessing systems. Appl Microbiol Biotechnol 2019; 103:9359-9371. [PMID: 31720773 DOI: 10.1007/s00253-019-10198-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/08/2019] [Accepted: 10/15/2019] [Indexed: 12/18/2022]
Abstract
There is a renewed interest in acetone-butanol-ethanol (ABE) fermentation from renewable substrates for the sustainable and environment-friendly production of biofuel and platform chemicals. However, the ABE fermentation is associated with several challenges due to the presence of heterogeneous components in the renewable substrates and the intrinsic characteristics of ABE fermentation process. Hence, there is a need to select optimal substrates and modify their characteristics suitable for the ABE fermentation process or microbial strain. This "designed biomass" can be used to establish the consolidated bioprocessing systems. As there are very few reports on designed biomass, the main objectives of this review are to summarize the main challenges associated with ABE fermentation from renewable substrates and to introduce feasible strategies for designing the substrates through pretreatment and hydrolysis technologies as well as through the establishment of consolidated bioprocessing systems. This review offers new insights on improving the efficiency of ABE fermentation from designed renewable substrates.
Collapse
Affiliation(s)
- Tao Zhao
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, College of Life Science, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang District, Qingdao, 266109, China
| | - Yukihiro Tashiro
- Laboratory of Soil and Environmental Microbiology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Laboratory of Microbial Environmental Protection, Tropical Microbiology Unit, Center for International Education and Research of Agriculture, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
| |
Collapse
|
3
|
Kadhum HJ, Mahapatra DM, Murthy GS. A novel method for real-time estimation of insoluble solids and glucose concentrations during enzymatic hydrolysis of biomass. BIORESOURCE TECHNOLOGY 2019; 275:328-337. [PMID: 30594844 DOI: 10.1016/j.biortech.2018.12.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/18/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
The study describes a novel method using instantaneous mixing torque and rotational speed to estimate insoluble solids and glucose concentrations during enzymatic hydrolysis of biomass. This method is cost-effective for real-time monitoring and control of enzymatic hydrolysis and potentially scalable. The model was developed using biomass slurries at three solids loading (20, 30 and 45%) at various rotational speeds from 50 to 400 rpm. The results showed a significant drop in mixing torque at 12 h with high solids loading. Maximum glucose concentration (205 g/l) during hydrolysis was achieved at 45% solids loading. Insoluble solids and glucose concentration as a function of torque and rotational speeds were modeled using a modified Herschell-Bulkley model. The model describes the experimental observations with high fidelity (R2 = 0.84) and can be used for real time monitoring of many multiphase reaction systems as enzymatic hydrolysis of lignocellulosic biomass and dry grind corn ethanol processes.
Collapse
Affiliation(s)
- Haider Jawad Kadhum
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97331, United States; College of Agriculture, Al-Qasim Green University, Babylon, Iraq
| | - Durga Madhab Mahapatra
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97331, United States
| | - Ganti S Murthy
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR 97331, United States.
| |
Collapse
|
4
|
Environmental Impacts of Experimental Production of Lactic Acid for Bioplastics from Ulva spp. SUSTAINABILITY 2018. [DOI: 10.3390/su10072462] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An exploratory Life Cycle Assessment (LCA) was carried out to provide insight into the environmental impacts of using the green seaweed Ulva spp. as a feedstock, for production of bioplastic. The study focused on the production of lactic acid as a precursor of polylactic acid. The study was on the production process: (1) The cultivation of Ulva spp., in an Integrated Multitrophic Aquaculture system; (2) the processing of the biomass for solubilization of sugars; (3) the fermentation of the sugars to lactic acid; (4) the isolation of lactic acid from fermentation broth. The study identified environmental hotspots and compared an experimental seaweed production chain with conventional feedstocks. The main hotspot is derived from electricity consumption during seaweed cultivation. The impact of electricity consumption can be lowered by reducing energy use and sourcing renewable energy, and by improving the material efficiency in the product chain. To improve understanding of the process of production’s environmental impacts, future studies should broaden the system boundaries and scope of sustainability issues included in the environmental assessment.
Collapse
|
5
|
Kim TI, Lim DH, Baek KS, Jang SS, Park BY, Mayakrishnan V. Production of chitinase from Escherichia fergusonii, chitosanase from Chryseobacterium indologenes, Comamonas koreensis and its application in N-acetylglucosamine production. Int J Biol Macromol 2018; 112:1115-1121. [PMID: 29452184 DOI: 10.1016/j.ijbiomac.2018.02.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/09/2018] [Accepted: 02/09/2018] [Indexed: 11/16/2022]
Abstract
The important platform polysaccharide N-acetylglucosamine (GlcNAc) has great potential to be used in the fields of food, cosmetics, agricultural, pharmaceutical, medicine and biotechnology. This GlcNAc is being produced by traditional methods of environment-unfriendly chemical digestion with strong acids. Therefore, researchers have been paying more attention to enzymatic hydrolysis process for the production of GlcNAc. Hence, in this study, we isolated novel chitinase (Escherichia fergusonii) and chitosanase (Chryseobacterium indologenes, Comamonas koreensis) producing strains from Korean native calves feces, and developed the potential of an eco-friendly microbial progression for GlcNAc production from swollen chitin and chitosan by enzymatic degradation. Maximum chitinase (7.24±0.07U/ml) and chitosanase (8.42±0.09, 8.51±0.25U/ml) enzyme activity were reached in submerged fermentation at an optimal pH of 7.0 and 30°C. In this study, sucrose, yeast extract, (NH4)2SO4, and NaCl were found to be the potential enhancers of exo-chitinase activity and glucose, corn flour, yeast extract, soybean flour, (NH4)2SO4, NH4Cl and K2HPO4 were found to be the potential activator for exo-chitosanase activity. Optimum concentrations of the carbon sources for enhanced chitinase activity were 9.91, 3.21, 9.86, 1.66U/ml and chitosanase activity were 1.63, 1.13, 2.28, 3.71, 9.02, 4.93, and 2.14U/ml. These enzymes efficiently hydrolyzed swollen chitin and chitosan to N-acetylglucosamine were characterized by thin layer chromatography and were further confirmed by high-pressure liquid chromatography. From a commercial perspective, we isolated, optimized and characterized exochitinase from Escherichia fergusonii (HANDI 110) and chitosanase from Chryseobacterium indologenes (HANYOO), and Comamonas koreensis (HANWOO) for the large-scale production of GlcNAc facilitating its potential use in industrial applications.
Collapse
Affiliation(s)
- Tae Il Kim
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31000, Republic of Korea
| | - Dong Hyun Lim
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31000, Republic of Korea
| | - Kwang Soo Baek
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31000, Republic of Korea
| | - Sun Sik Jang
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, #4937, Gyeonggang-ro, Daegwallyeong-myeon, Pyeongchang-gun, Gangwon-do 25340, Republic of Korea
| | - Beom Young Park
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31000, Republic of Korea
| | - Vijayakumar Mayakrishnan
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31000, Republic of Korea.
| |
Collapse
|
6
|
Operational Strategies for Enzymatic Hydrolysis in a Biorefinery. BIOFUEL AND BIOREFINERY TECHNOLOGIES 2018. [DOI: 10.1007/978-3-319-67678-4_10] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
7
|
Makarova EI, Budaeva VV, Kukhlenko AA, Orlov SE. Enzyme kinetics of cellulose hydrolysis of Miscanthus and oat hulls. 3 Biotech 2017; 7:317. [PMID: 28955614 DOI: 10.1007/s13205-017-0964-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/07/2017] [Indexed: 11/25/2022] Open
Abstract
Experiments were done to model enzymatic hydrolysis of Miscanthus and oat hulls treated with dilute solutions of nitric acid and sodium hydroxide in direct and reverse sequences. The enzymatic hydrolysis kinetics of the substrates was studied at an initial solid loading from 30 to 120 g/L. The effects of feedstock type and its pretreatment method on the initial hydrolysis rate and reducing sugar yield were evaluated. The fitting results by the developed models showed good agreement with the experimental data. These models designed for developing the production technology of concentrated glucose solutions can also be applied for glucose fermentation into ethanol. The initial solid loading of 60-90 g/L provides the reducing sugar concentration of 40-80 g/L necessary for ethanol synthesis. The kinetic model can also be applied to investigate enzymatic hydrolysis of other substrates (feedstock type, pretreatment method) under the similar conditions used herein, with adjusted empirical coefficient values.
Collapse
Affiliation(s)
- Ekaterina I Makarova
- Laboratory of Bioconversion, Laboratory of Chemical Engineering Processes and Apparatuses, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk, Altai Krai Russia 659322
| | - Vera V Budaeva
- Laboratory of Bioconversion, Laboratory of Chemical Engineering Processes and Apparatuses, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk, Altai Krai Russia 659322
| | - Aleksey A Kukhlenko
- Laboratory of Bioconversion, Laboratory of Chemical Engineering Processes and Apparatuses, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk, Altai Krai Russia 659322
| | - Sergey E Orlov
- Laboratory of Bioconversion, Laboratory of Chemical Engineering Processes and Apparatuses, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk, Altai Krai Russia 659322
| |
Collapse
|
8
|
Chakraborty S, Singh PK, Paramashetti P. Microreactor-based mixing strategy suppresses product inhibition to enhance sugar yields in enzymatic hydrolysis for cellulosic biofuel production. BIORESOURCE TECHNOLOGY 2017; 237:99-107. [PMID: 28389042 DOI: 10.1016/j.biortech.2017.03.152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
A novel microreactor-based energy-efficient process of using complete convective mixing in a macroreactor till an optimal mixing time followed by no mixing in 200-400μl microreactors enhances glucose and reducing sugar yields by upto 35% and 29%, respectively, while saving 72-90% of the energy incurred on reactor mixing in the enzymatic hydrolysis of cellulose. Empirical exponential relations are provided for determining the optimal mixing time, during which convective mixing in the macroreactor promotes mass transport of the cellulase enzyme to the solid Avicel substrate, while the latter phase of no mixing in the microreactor suppresses product inhibition by preventing the inhibitors (glucose and cellobiose) from homogenizing across the reactor. Sugar yield increases linearly with liquid to solid height ratio (rh), irrespective of substrate loading and microreactor size, since large rh allows the inhibitors to diffuse in the liquid away from the solids, thus reducing product inhibition.
Collapse
Affiliation(s)
- Saikat Chakraborty
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Prasun Kumar Singh
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pawan Paramashetti
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| |
Collapse
|
9
|
Gama R, Van Dyk JS, Burton MH, Pletschke BI. Using an artificial neural network to predict the optimal conditions for enzymatic hydrolysis of apple pomace. 3 Biotech 2017; 7:138. [PMID: 28593522 DOI: 10.1007/s13205-017-0754-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 01/23/2017] [Indexed: 10/19/2022] Open
Abstract
The enzymatic degradation of lignocellulosic biomass such as apple pomace is a complex process influenced by a number of hydrolysis conditions. Predicting optimal conditions, including enzyme and substrate concentration, temperature and pH can improve conversion efficiency. In this study, the production of sugar monomers from apple pomace using commercial enzyme preparations, Celluclast 1.5L, Viscozyme L and Novozyme 188 was investigated. A limited number of experiments were carried out and then analysed using an artificial neural network (ANN) to model the enzymatic hydrolysis process. The ANN was used to simulate the enzymatic hydrolysis process for a range of input variables and the optimal conditions were successfully selected as was indicated by the R 2 value of 0.99 and a small MSE value. The inputs for the ANN were substrate loading, enzyme loading, temperature, initial pH and a combination of these parameters, while release profiles of glucose and reducing sugars were the outputs. Enzyme loadings of 0.5 and 0.2 mg/g substrate and a substrate loading of 30% were optimal for glucose and reducing sugar release from apple pomace, respectively, resulting in concentrations of 6.5 g/L glucose and 28.9 g/L reducing sugars. Apple pomace hydrolysis can be successfully carried out based on the predicted optimal conditions from the ANN.
Collapse
|
10
|
Kim TI, Ki KS, Lim DH, Vijayakumar M, Park SM, Choi SH, Kim KY, Im SK, Park BY. Novel Acinetobacter parvus HANDI 309 microbial biomass for the production of N-acetyl-β-d-glucosamine (GlcNAc) using swollen chitin substrate in submerged fermentation. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:59. [PMID: 28293289 PMCID: PMC5345198 DOI: 10.1186/s13068-017-0740-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 02/21/2017] [Indexed: 05/30/2023]
Abstract
BACKGROUND N-acetyl-β-d-glucosamine (GlcNAc)6 is extensively used as an important bio-agent and a functional food additive. The traditional chemical process for GlcNAc production has some problems such as high production cost, low yield, and acidic pollution. Therefore, to discover a novel chitinase that is suitable for bioconversion of chitin to GlcNAc would be of great value. RESULTS Here, we describe the complete isolation and functional characterization of a novel exo-chitinase from Acinetobacter parvus HANDI 309 for the conversion of chitin. The identified exo-chitinase mainly produced N-acetyl-d-glucosamine, using chitin as a substrate by submerged fermentation. The A. parvus HANDI 309 biofuels producing exo-chitinase were characterized by TLC, and was further validated and quantified by HPLC. Furthermore, the optimal temperature and pH for the exo-chitinase activity was obtained in the culture conditions of 30 °C and 7.0, respectively. The maximum growth of the stationary phase was reached in 24 h after incubation. These results suggest that A. parvus HANDI 309 biofuels producing exo-chitinases may have great potential in chitin to N-acetyl-d-glucosamine conversion. CONCLUSIONS The excellent thermostability and hydrolytic properties may give the exo-chitinase great potential in chitin to GlcNAc conversion in industry. This is the first report that A. parvus HANDI 309 is a novel bacterial strain that has the ability to produce an enormous amount of exo-chitinase-producing bio-agents in a short time on an industrial scale without any pretreatment, as well as being potentially valuable in the food and pharmaceutical industries.
Collapse
Affiliation(s)
- Tae Il Kim
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Kwang Seok Ki
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Dong Hyun Lim
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Mayakrishnan Vijayakumar
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Seong Min Park
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Sun Ho Choi
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Ki Young Kim
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Seok Ki Im
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| | - Beom Young Park
- Dairy Science Division, National Institute of Animal Science, Rural Development Administration, #114, Shinbang 1Gil, Seonghwan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-801 South Korea
| |
Collapse
|
11
|
Montella S, Ventorino V, Lombard V, Henrissat B, Pepe O, Faraco V. Discovery of genes coding for carbohydrate-active enzyme by metagenomic analysis of lignocellulosic biomasses. Sci Rep 2017; 7:42623. [PMID: 28198423 PMCID: PMC5309792 DOI: 10.1038/srep42623] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 01/13/2017] [Indexed: 12/03/2022] Open
Abstract
In this study, a high-throughput sequencing approach was applied to discover novel biocatalysts for lignocellulose hydrolysis from three dedicated energy crops, Arundo donax, Eucalyptus camaldulensis and Populus nigra, after natural biodegradation. The microbiomes of the three lignocellulosic biomasses were dominated by bacterial species (approximately 90%) with the highest representation by the Streptomyces genus both in the total microbial community composition and in the microbial diversity related to GH families of predicted ORFs. Moreover, the functional clustering of the predicted ORFs showed a prevalence of poorly characterized genes, suggesting these lignocellulosic biomasses are potential sources of as yet unknown genes. 1.2%, 0.6% and 3.4% of the total ORFs detected in A. donax, E. camaldulensis and P. nigra, respectively, were putative Carbohydrate-Active Enzymes (CAZymes). Interestingly, the glycoside hydrolases abundance in P. nigra (1.8%) was higher than that detected in the other biomasses investigated in this study. Moreover, a high percentage of (hemi)cellulases with different activities and accessory enzymes (mannanases, polygalacturonases and feruloyl esterases) was detected, confirming that the three analyzed samples were a reservoir of diversified biocatalysts required for an effective lignocellulose saccharification.
Collapse
Affiliation(s)
- Salvatore Montella
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, via Cintia, 4 80126 Naples, Italy
| | - Valeria Ventorino
- Department of Agricultural Sciences, University of Naples "Federico II", Portici (Napoli), Italy
| | - Vincent Lombard
- CNRS UMR 7257, Aix-Marseille University, 13288 Marseille, France.,INRA, USC 1408 AFMB, 13288 Marseille, France
| | - Bernard Henrissat
- CNRS UMR 7257, Aix-Marseille University, 13288 Marseille, France.,INRA, USC 1408 AFMB, 13288 Marseille, France.,Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Olimpia Pepe
- Department of Agricultural Sciences, University of Naples "Federico II", Portici (Napoli), Italy
| | - Vincenza Faraco
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, via Cintia, 4 80126 Naples, Italy
| |
Collapse
|
12
|
Jiang L, Wu N, Zheng A, Zhao Z, He F, Li H. The integration of dilute acid hydrolysis of xylan and fast pyrolysis of glucan to obtain fermentable sugars. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:196. [PMID: 27651831 PMCID: PMC5022164 DOI: 10.1186/s13068-016-0612-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Fermentable sugars are important intermediates in the biological conversion of biomass. Hemicellulose and amorphous cellulose are easily hydrolyzed to fermentable sugars in dilute acid, whereas crystalline cellulose is more difficult to be hydrolyzed. Cellulose fast pyrolysis is an alternative method to liberate valuable fermentable sugars from biomass. The amount of levoglucosan generated from lignocellulose by fast pyrolysis is usually lower than the theoretical yield based on the cellulose fraction. Pretreatment is a promising route to improve the yield of levoglucosan from lignocellulose. RESULTS The integration of dilute sulfuric acid hydrolysis and fast pyrolysis to obtain fermentable sugars was evaluated in this study. Dilute sulfuric acid hydrolysis could remove more than 95.1 and 93.4 % of xylan (the main component of hemicellulose) from sugarcane bagasse and corncob with high yield of xylose. On the other hand, dilute sulfuric acid hydrolysis was also an effective pretreatment to enhance levoglucosan yield from lignocellulose. Dilute acid hydrolysis could accumulate glucan (the component of cellulose) and remove most of the alkali and alkaline earth metals which were powerful catalysts during fast pyrolysis. Further increase in dilute acid concentration (from 0 to 2 %) in pretreatment could promote the yield of levoglucosan in fast pyrolysis. The acid pretreated sugarcane bagasse and corncob gave levoglucosan yields of 43.8 and 35.2 % which were obvious higher than those of raw sugarcane bagasse (12.0 %) and corncob (7.0 %). CONCLUSIONS Obtaining fermentable sugars by combination dilute acid hydrolysis of xylan and fast pyrolysis of glucan could make full utilization of biomass, and get fermentable sugars economically from biomass for bio-refinery.
Collapse
Affiliation(s)
- Liqun Jiang
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
| | - Nannan Wu
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Anqing Zheng
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
| | - Zengli Zhao
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
| | - Fang He
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
| | - Haibin Li
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou, 510640 China
| |
Collapse
|
13
|
Sugiharto YEC, Harimawan A, Kresnowati MTAP, Purwadi R, Mariyana R, Fitriana HN, Hosen HF. Enzyme feeding strategies for better fed-batch enzymatic hydrolysis of empty fruit bunch. BIORESOURCE TECHNOLOGY 2016; 207:175-9. [PMID: 26881335 DOI: 10.1016/j.biortech.2016.01.113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 01/28/2016] [Accepted: 01/29/2016] [Indexed: 05/15/2023]
Abstract
Lignin inhibitory becomes a major obstacle for enzymatic hydrolysis of empty fruit bunch conducted in high solid loading. Since current technology required high enzyme loading, surfactant application could not effectively used since it is only efficient in low enzyme loading. In addition, it will increase final operation cost. Hence, another method namely "proportional enzyme feeding" was investigated in this paper. In this method, enzyme was added to reactor proportionally to substrate addition, different from conventional method ("whole enzyme feeding") where whole enzyme was added prior to hydrolysis process started. Proportional enzyme feeding could increase enzymatic digestibility and glucose concentration up to 26% and 12% respectively, compared to whole enzyme feeding for hydrolysis duration more than 40h. If enzymatic hydrolysis was run less than 40h (25% solid loading), whole enzyme feeding is preferable.
Collapse
Affiliation(s)
| | - Ardiyan Harimawan
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Made Tri Ari Penia Kresnowati
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Ronny Purwadi
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | - Rina Mariyana
- PT Rekayasa Industri, Kalibata Timur 1 Street 36 Kalibata, Jakarta 12740, Indonesia
| | - Hana Nur Fitriana
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
| | | |
Collapse
|
14
|
Pancha I, Chokshi K, Maurya R, Bhattacharya S, Bachani P, Mishra S. Comparative evaluation of chemical and enzymatic saccharification of mixotrophically grown de-oiled microalgal biomass for reducing sugar production. BIORESOURCE TECHNOLOGY 2016; 204:9-16. [PMID: 26771924 DOI: 10.1016/j.biortech.2015.12.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 12/24/2015] [Accepted: 12/26/2015] [Indexed: 05/08/2023]
Abstract
For the commercialization of microalgal based biofuels, utilization of de-oiled carbohydrate rich biomass is important. In the present study, chemo-enzymatic hydrolysis of mixotrophically grown Scenedesmus sp. CCNM 1077 de-oiled biomass is evaluated. Among the chemical hydrolysis, use of 0.5M HCl for 45 min at 121°C resulted in highest saccharification yield of 37.87% w/w of de-oiled biomass. However, enzymatic hydrolysis using Viscozyme L at loading rate of 20 FBGU/g of de-oiled biomass, pH 5.5 and temperature 45°C for 72 h resulted in saccharification yield of 43.44% w/w of de-oiled biomass. Further, 78% ethanol production efficiency was achieved with enzymatically hydrolyzed de-oiled biomass using yeast Saccharomyces cerevisiae ATCC 6793. These findings of the present study show application of mixotrophically grown de-oiled biomass of Scenedesmus sp. CCNM 1077 as promising feedstock for bioethanol production.
Collapse
Affiliation(s)
- Imran Pancha
- Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Kaumeel Chokshi
- Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Rahulkumar Maurya
- Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Sourish Bhattacharya
- Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Process Design and Engineering Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Pooja Bachani
- Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Sandhya Mishra
- Salt & Marine Chemicals, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India; Academy of Scientific & Innovative Research (AcSIR), CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India.
| |
Collapse
|
15
|
Corrêa LJ, Badino AC, Cruz AJG. Power consumption evaluation of different fed-batch strategies for enzymatic hydrolysis of sugarcane bagasse. Bioprocess Biosyst Eng 2016; 39:825-33. [DOI: 10.1007/s00449-016-1562-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/02/2016] [Indexed: 10/22/2022]
|
16
|
Jiang L, Zheng A, Zhao Z, He F, Li H, Wu N. The comparison of obtaining fermentable sugars from cellulose by enzymatic hydrolysis and fast pyrolysis. BIORESOURCE TECHNOLOGY 2016; 200:8-13. [PMID: 26476158 DOI: 10.1016/j.biortech.2015.09.096] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 09/22/2015] [Accepted: 09/23/2015] [Indexed: 06/05/2023]
Abstract
Sugars are one of intermediates in the biological and chemical conversion of biomass. The objective of this study was to make comparison of obtaining fermentable sugars by enzymatic hydrolysis and fast pyrolysis of ball milling pretreated cellulose. After ball milling pretreatment for 0-18h, with the accumulation of alkali and alkali earth metals (from 50.8 to 276.4ppm) and decrease of the crystalline structure (from 89.8% to 10.1%), the hydrolysis yields increased from 23.6% to 56.0% in enzymatic saccharification, while the yields of levoglucosan diminished from 61.5% to 45.6% gradually in fast pyrolysis. Both enzymatic saccharification and fast pyrolysis had unique attractive features and unfavorable limitations. The present research provided a concept for considering choices among the technologies and feedstocks currently available.
Collapse
Affiliation(s)
- Liqun Jiang
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Anqing Zheng
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Zengli Zhao
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Fang He
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Haibin Li
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Nannan Wu
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| |
Collapse
|
17
|
Quiroga AG, Silvera AB, Padilla RV, Costa ACD, Maciel Filho R. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2015. [DOI: 10.1590/0104-6632.20150324s00003547] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
18
|
Liguori R, Ventorino V, Pepe O, Faraco V. Bioreactors for lignocellulose conversion into fermentable sugars for production of high added value products. Appl Microbiol Biotechnol 2015; 100:597-611. [PMID: 26572518 PMCID: PMC4703634 DOI: 10.1007/s00253-015-7125-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/22/2015] [Accepted: 10/26/2015] [Indexed: 11/30/2022]
Abstract
Lignocellulosic biomasses derived from dedicated crops and agro-industrial residual materials are promising renewable resources for the production of fuels and other added value bioproducts. Due to the tolerance to a wide range of environments, the dedicated crops can be cultivated on marginal lands, avoiding conflict with food production and having beneficial effects on the environment. Besides, the agro-industrial residual materials represent an abundant, available, and cheap source of bioproducts that completely cut out the economical and environmental issues related to the cultivation of energy crops. Different processing steps like pretreatment, hydrolysis and microbial fermentation are needed to convert biomass into added value bioproducts. The reactor configuration, the operative conditions, and the operation mode of the conversion processes are crucial parameters for a high yield and productivity of the biomass bioconversion process. This review summarizes the last progresses in the bioreactor field, with main attention on the new configurations and the agitation systems, for conversion of dedicated energy crops (Arundo donax) and residual materials (corn stover, wheat straw, mesquite wood, agave bagasse, fruit and citrus peel wastes, sunflower seed hull, switchgrass, poplar sawdust, cogon grass, sugarcane bagasse, sunflower seed hull, and poplar wood) into sugars and ethanol. The main novelty of this review is its focus on reactor components and properties.
Collapse
Affiliation(s)
- Rossana Liguori
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo via Cintia 4, 80126, Naples, Italy
| | - Valeria Ventorino
- Department of Agriculture, University of Naples Federico II, Portici, Italy
| | - Olimpia Pepe
- Department of Agriculture, University of Naples Federico II, Portici, Italy
| | - Vincenza Faraco
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo via Cintia 4, 80126, Naples, Italy.
| |
Collapse
|
19
|
Gaona A, Lawryshyn Y, Saville B. The Effect of Fed-Batch Operation and Rotational Speed on High-Solids Enzymatic Hydrolysis of Hardwood Substrates. Ind Biotechnol (New Rochelle N Y) 2015. [DOI: 10.1089/ind.2014.0031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Adriana Gaona
- Laboratory of Bioprocess and Enzyme Technology, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
| | - Yuri Lawryshyn
- Laboratory of Bioprocess and Enzyme Technology, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
| | - Bradley Saville
- Laboratory of Bioprocess and Enzyme Technology, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada
| |
Collapse
|
20
|
Singh S, Agarwal M, Sarma S, Goyal A, Moholkar VS. Mechanistic insight into ultrasound induced enhancement of simultaneous saccharification and fermentation of Parthenium hysterophorus for ethanol production. ULTRASONICS SONOCHEMISTRY 2015; 26:249-256. [PMID: 25813894 DOI: 10.1016/j.ultsonch.2015.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/21/2015] [Accepted: 02/25/2015] [Indexed: 05/24/2023]
Abstract
This paper presents investigations into mechanism of ultrasound assisted bioethanol synthesis using Parthenium hysterophorus biomass through simultaneous saccharification and fermentation (SSF) mode. Approach of coupling experimental results to mathematical model for SSF using Genetic Algorithm based optimization has been adopted. Comparison of model parameters for experiments with mechanical shaking and sonication (10% duty cycle) give an interesting mechanistic account of influence of ultrasound on SSF system. A 4-fold rise in ethanol and cell mass productivity is seen with ultrasound. The analysis reveals following facets of influence of ultrasound on SSF: increase in Monod constant for glucose for cell growth, maximal specific growth rate and inhibition constant of cell growth by glucose and reduction in specific cell death rate. Values of inhibition constant of cell growth by ethanol (K3E), and constants for growth associated (a) and non-growth associated (b) ethanol production remained unaltered with sonication. Beneficial effects of ultrasound are attributed to enhanced cellulose hydrolysis, enhanced trans-membrane transport of substrate and products as well as dilution of the toxic substances due to micro-convection induced by ultrasound. Intrinsic physiological functioning of cells remained unaffected by ultrasound as indicated by unaltered values of K3E, a and b.
Collapse
Affiliation(s)
- Shuchi Singh
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Shyamali Sarma
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arun Goyal
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
| | - Vijayanand S Moholkar
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
| |
Collapse
|
21
|
Visser EM, Leal TF, de Almeida MN, Guimarães VM. Increased enzymatic hydrolysis of sugarcane bagasse from enzyme recycling. BIOTECHNOLOGY FOR BIOFUELS 2015; 8:5. [PMID: 25642284 PMCID: PMC4311420 DOI: 10.1186/s13068-014-0185-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 12/15/2014] [Indexed: 05/09/2023]
Abstract
BACKGROUND Development of efficient methods for production of renewable fuels from lignocellulosic biomass is necessary to maximize yields and reduce operating costs. One of the main challenges to industrial application of the lignocellulosic conversion process is the high costs of cellulolytic enzymes. Recycling of enzymes may present a potential solution to alleviate this problem. In the present study enzymes associated with the insoluble fraction were recycled after enzymatic hydrolysis of pretreated sugarcane bagasse, utilizing different processing conditions, enzyme loadings, and solid loadings. RESULTS It was found that the enzyme blend from Chrysoporthe cubensis and Penicillium pinophilum was efficient for enzymatic hydrolysis and that a significant portion of enzyme activity could be recovered upon recycling of the insoluble fraction. Enzyme productivity values (g glucose/mg enzyme protein) over all recycle periods were 2.4 and 3.7 for application of 15 and 30 FPU/g of glucan, representing an increase in excess of ten times that obtained in a batch process with the same enzyme blend and an even greater increase compared to commercial cellulase enzymes. CONCLUSIONS Contrary to what may be expected, increasing lignin concentrations throughout the recycle period did not negatively influence hydrolysis efficiency, but conversion efficiencies continuously improved. Recycling of the entire insoluble solids fraction was sufficient for recycling of adhered enzymes together with biomass, indicative of an effective method to increase enzyme productivity.
Collapse
Affiliation(s)
- Evan Michael Visser
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Campus Universitário, 36570-000 Viçosa, MG Brazil
| | - Tiago Ferreira Leal
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Campus Universitário, 36570-000 Viçosa, MG Brazil
| | - Maíra Nicolau de Almeida
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Campus Universitário, 36570-000 Viçosa, MG Brazil
| | - Valéria Monteze Guimarães
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Campus Universitário, 36570-000 Viçosa, MG Brazil
| |
Collapse
|
22
|
Singh S, Sarma S, Agarwal M, Goyal A, Moholkar VS. Ultrasound enhanced ethanol production from Parthenium hysterophorus: A mechanistic investigation. BIORESOURCE TECHNOLOGY 2014; 188:287-94. [PMID: 25555927 DOI: 10.1016/j.biortech.2014.12.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 05/24/2023]
Abstract
This study presents mechanistic investigations in ultrasound-assisted bioethanol fermentation using Parthenium hysterophorus biomass. Ultrasound (35 kHz, 10% duty cycle) has been used for sonication. Experimental results were fitted to mathematical model; the kinetic and physiological parameters in the model were obtained using Genetic Algorithm (GA) based optimization. In control experiments (mechanical shaking), maximum ethanol titer of 10.93 g/L and cell mass concentration of 5.26 g/L was obtained after 18 h. In test experiments (mechanical shaking and intermittent sonication), ethanol titer of 12.14 g/L and cell mass concentration of 5.7 g/L was obtained in 10h. This indicated ∼ 2 × enhanced productivity of ethanol and cell mass with sonication. Trends in model parameters obtained after fitting of model to experimental data essentially revealed that beneficial influence of ultrasound on fermentation is a manifestation of enhanced trans-membrane transportation and dilution of toxic substances due to strong micro-convection induced by ultrasound.
Collapse
Affiliation(s)
- Shuchi Singh
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Shyamali Sarma
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Mayank Agarwal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Arun Goyal
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
| |
Collapse
|
23
|
Simultaneous saccharification and fermentation of pretreated sugarcane bagasse to ethanol using a new thermotolerant yeast. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0875-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
24
|
Kinetics of enzymatic hydrolysis of olive oil in batch and fed-batch systems. Appl Biochem Biotechnol 2014; 173:1336-48. [PMID: 24793196 DOI: 10.1007/s12010-014-0943-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
Abstract
This work reports experimental data, kinetic modeling, and simulations of enzyme-catalyzed hydrolysis of olive oil. This reaction was performed in batch system and an ordered-sequential Bi Bi model was used to model the kinetic mechanism. A fed-batch system was proposed and experimental data were obtained and compared to the simulated values. The kinetic model used was able to correlate the experimental data, in which a satisfactory agreement between the experimental data and modeling results was obtained under different enzyme concentration and initial free water content. Therefore, the modeling allowed a better understanding of the reaction kinetics and affords a fed-batch simulation for this system. From the results obtained, it was observed that the fed-batch approach showed to be more advantageous when compared to the conventional batch system.
Collapse
|
25
|
Vera C, Guerrero C, Illanes A, Conejeros R. Fed-batch synthesis of galacto-oligosaccharides withAspergillus oryzaeβ-galactosidase using optimal control strategy. Biotechnol Prog 2013; 30:59-67. [DOI: 10.1002/btpr.1831] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 10/14/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Carlos Vera
- School of Biochemical Engineering; Pontificia Universidad Católica de Valparaíso; Avenida Brasil 2147 Valparaíso Chile
| | - Cecilia Guerrero
- School of Biochemical Engineering; Pontificia Universidad Católica de Valparaíso; Avenida Brasil 2147 Valparaíso Chile
| | - Andrés Illanes
- School of Biochemical Engineering; Pontificia Universidad Católica de Valparaíso; Avenida Brasil 2147 Valparaíso Chile
| | - Raúl Conejeros
- School of Biochemical Engineering; Pontificia Universidad Católica de Valparaíso; Avenida Brasil 2147 Valparaíso Chile
| |
Collapse
|
26
|
Zhao X, Dong L, Chen L, Liu D. Batch and multi-step fed-batch enzymatic saccharification of Formiline-pretreated sugarcane bagasse at high solid loadings for high sugar and ethanol titers. BIORESOURCE TECHNOLOGY 2013; 135:350-6. [PMID: 23127840 DOI: 10.1016/j.biortech.2012.09.074] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 09/19/2012] [Accepted: 09/23/2012] [Indexed: 05/23/2023]
Abstract
Formiline pretreatment pertains to a biomass fractionation process. In the present work, Formiline-pretreated sugarcane bagasse was hydrolyzed with cellulases by batch and multi-step fed-batch processes at 20% solid loading. For wet pulp, after 144 h incubation with cellulase loading of 10 FPU/g dry solid, fed-batch process obtained ~150 g/L glucose and ~80% glucan conversion, while batch process obtained ~130 g/L glucose with corresponding ~70% glucan conversion. Solid loading could be further increased to 30% for the acetone-dried pulp. By fed-batch hydrolysis of the dried pulp in pH 4.8 buffer solution, glucose concentration could be 247.3±1.6 g/L with corresponding 86.1±0.6% glucan conversion. The enzymatic hydrolyzates could be well converted to ethanol by a subsequent fermentation using Saccharomices cerevisiae with ethanol titer of 60-70 g/L. Batch and fed-batch SSF indicated that Formiline-pretreated substrate showed excellent fermentability. The final ethanol concentration was 80 g/L with corresponding 82.7% of theoretical yield.
Collapse
Affiliation(s)
- Xuebing Zhao
- Institute of Applied Chemistry, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
| | | | | | | |
Collapse
|
27
|
Awg-Adeni DS, Bujang KB, Hassan MA, Abd-Aziz S. Recovery of glucose from residual starch of sago hampas for bioethanol production. BIOMED RESEARCH INTERNATIONAL 2012; 2013:935852. [PMID: 23509813 PMCID: PMC3591117 DOI: 10.1155/2013/935852] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 11/11/2012] [Accepted: 11/12/2012] [Indexed: 11/17/2022]
Abstract
Lower concentration of glucose was often obtained from enzymatic hydrolysis process of agricultural residue due to complexity of the biomass structure and properties. High substrate load feed into the hydrolysis system might solve this problem but has several other drawbacks such as low rate of reaction. In the present study, we have attempted to enhance glucose recovery from agricultural waste, namely, "sago hampas," through three cycles of enzymatic hydrolysis process. The substrate load at 7% (w/v) was seen to be suitable for the hydrolysis process with respect to the gelatinization reaction as well as sufficient mixture of the suspension for saccharification process. However, this study was focused on hydrolyzing starch of sago hampas, and thus to enhance concentration of glucose from 7% substrate load would be impossible. Thus, an alternative method termed as cycles I, II, and III which involved reusing the hydrolysate for subsequent enzymatic hydrolysis process was introduced. Greater improvement of glucose concentration (138.45 g/L) and better conversion yield (52.72%) were achieved with the completion of three cycles of hydrolysis. In comparison, cycle I and cycle II had glucose concentration of 27.79 g/L and 73.00 g/L, respectively. The glucose obtained was subsequently tested as substrate for bioethanol production using commercial baker's yeast. The fermentation process produced 40.30 g/L of ethanol after 16 h, which was equivalent to 93.29% of theoretical yield based on total glucose existing in fermentation media.
Collapse
Affiliation(s)
- D. S. Awg-Adeni
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
- Department of Molecular Biology, Faculty of Resource Sciences and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Malaysia
| | - K. B. Bujang
- Department of Molecular Biology, Faculty of Resource Sciences and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Malaysia
| | - M. A. Hassan
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - S. Abd-Aziz
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| |
Collapse
|