1
|
Saini R, Tiwari BR, Brancoli P, Taherzadeh MJ, Kaur Brar S. Environmental assessment of Rhodosporidium toruloides-1588 based oil production using wood hydrolysate and crude glycerol. BIORESOURCE TECHNOLOGY 2024; 393:130102. [PMID: 38016584 DOI: 10.1016/j.biortech.2023.130102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/22/2023] [Accepted: 11/23/2023] [Indexed: 11/30/2023]
Abstract
Rhodosporidium toruloides, an oleaginous yeast, is a potential feedstock for biodiesel production due to its ability to utilize lignocellulosic biomass-derived hydrolysate with a considerably high lipid titer of 50-70 % w/w. Hence, for the first-time environmental assessment of large-scale R. toruloides-based biodiesel production from wood hydrolysate and crude glycerol was conducted. The global warming potential was observed to be 0.67 kg CO2 eq./MJ along with terrestrial ecotoxicity of 1.37 kg 1,4-DCB eq./MJ and fossil depletion of 0.13 kg oil eq./MJ. The highest impacts for global warming (∼45 %) and fossil depletion (∼37 %) are attributed to the use of chloroform for lipid extraction while fuel consumption for transportation contributed more than 50 % to terrestrial ecotoxicity. Further, sensitivity analysis revealed that maximizing biodiesel yield by increasing lipid yield and solid loading could contribute to reduced environmental impacts. In nutshell, this investigation reveals that environmental impact varies with the type of chemical utilized.
Collapse
Affiliation(s)
- Rahul Saini
- Civil Engineering Department, Lassonde School of Engineering, York University, North York, Ontario M3J 1P3, Canada
| | - Bikash R Tiwari
- INRS-ETE, University of Quebec, 490 Rue de La Couronne, Quebec G1K 9A9, Canada
| | - Pedro Brancoli
- Swedish Centre for Resource Recovery, University of Borås, Borås 501 90, Sweden
| | | | - Satinder Kaur Brar
- Civil Engineering Department, Lassonde School of Engineering, York University, North York, Ontario M3J 1P3, Canada.
| |
Collapse
|
2
|
Cao J, Zhang X, Zhao S. Mechanistic study of two-dimensional CrS 2/Sc 2CF 2 direct Z-scheme heterojunction as the solar-driven water-splitting photocatalyst. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2112988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Jiameng Cao
- Xi'an University of Technology, Xi'an, People’s Republic of China
| | - Xianbin Zhang
- Xi'an University of Technology, Xi'an, People’s Republic of China
| | - Shihan Zhao
- Xi'an University of Technology, Xi'an, People’s Republic of China
| |
Collapse
|
3
|
Correa-Galeote D, Argiz L, Mosquera-Corral A, Del Rio AV, Juárez-Jiménez B, González-López J, Rodelas B. Structure of fungal communities in sequencing batch reactors operated at different salinities for the selection of triacylglyceride-producers from a fish-canning lipid-rich waste stream. N Biotechnol 2022; 71:47-55. [PMID: 35931375 DOI: 10.1016/j.nbt.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 07/30/2022] [Accepted: 08/01/2022] [Indexed: 12/01/2022]
Abstract
Oleaginous fungi natively accumulate large amounts of triacylglycerides (TAG), widely used as precursors for sustainable biodiesel production. However, little attention has been paid to the diversity and roles of fungal mixed microbial cultures (MMCs) in sequencing batch reactors (SBR). In this study, a lipid-rich stream produced in the fish-canning industry was used as a substrate in two laboratory-scale SBRs operated under the feast/famine (F/F) regime to enrich microorganisms with high TAG-storage ability, under two different concentrations of NaCl (SBR-N: 0.5g/L; SBR-S: 10g/L). The size of the fungal community in the enriched activated sludge (EAS) was analyzed using 18S rRNA-based qPCR, and the fungal community structure was determined by Illumina sequencing. The different selective pressures (feeding strategy and control of pH) implemented in the enrichment SBRs throughout operation increased the abundance of total fungi. In general, there was an enrichment of genera previously identified as TAG-accumulating fungi (Apiotrichum, Candida, Cutaneotrichosporon, Geotrichum, Haglerozyma, Metarhizium, Mortierella, Saccharomycopsis, and Yarrowia) in both SBRs. However, the observed increase of their relative abundances throughout operation was not significantly linked to a higher TAG accumulation.
Collapse
Affiliation(s)
- David Correa-Galeote
- Microbiology Department, Faculty of Pharmacy, University of Granada, 18001 Granada, Andalucía, Spain; Microbiology and Environmental technology section, Microbiology Department, Faculty of Pharmacy, University of Granada, 18011 Granada, Andalucía, Spain.
| | - Lucía Argiz
- CRETUS Institute, Department of Chemical Engineering, University of Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
| | - Anuska Mosquera-Corral
- CRETUS Institute, Department of Chemical Engineering, University of Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
| | - Angeles Val Del Rio
- CRETUS Institute, Department of Chemical Engineering, University of Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
| | - Belen Juárez-Jiménez
- Microbiology Department, Faculty of Pharmacy, University of Granada, 18001 Granada, Andalucía, Spain; Microbiology and Environmental technology section, Microbiology Department, Faculty of Pharmacy, University of Granada, 18011 Granada, Andalucía, Spain
| | - Jesús González-López
- Microbiology Department, Faculty of Pharmacy, University of Granada, 18001 Granada, Andalucía, Spain; Microbiology and Environmental technology section, Microbiology Department, Faculty of Pharmacy, University of Granada, 18011 Granada, Andalucía, Spain
| | - Belen Rodelas
- Microbiology Department, Faculty of Pharmacy, University of Granada, 18001 Granada, Andalucía, Spain; Microbiology and Environmental technology section, Microbiology Department, Faculty of Pharmacy, University of Granada, 18011 Granada, Andalucía, Spain
| |
Collapse
|
4
|
Singh N, Kumar K, Goyal A, Moholkar VS. Ultrasound-assisted biodiesel synthesis by in–situ transesterification of microalgal biomass: Optimization and kinetic analysis. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102582] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
5
|
Thangavelu K, Sundararaju P, Srinivasan N, Uthandi S. Bioconversion of sago processing wastewater into biodiesel: Optimization of lipid production by an oleaginous yeast, Candida tropicalis ASY2 and its transesterification process using response surface methodology. Microb Cell Fact 2021; 20:167. [PMID: 34446015 PMCID: PMC8394618 DOI: 10.1186/s12934-021-01655-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Biodiesel is an eco-friendly and renewable energy source and a valuable substitute for petro-diesel. Sago processing wastewater (SWW), a by-product of the cassava processing industry, has starch content ranging from 4 to 7 g L-1 and serves as an outstanding source for producing microbial lipids by the oleaginous microorganisms. In the present study, Candida tropicalis ASY2 was employed to optimize single-cell oil (SCO) production using SWW and subsequent transesterification by response surface methodology. Variables such as starch content, yeast extract, airflow rate, pH, and temperature significantly influenced lipid production in a preliminary study. The lipid production was scaled up to 5 L capacity airlift bioreactor and its optimization was done by response surface methodology. The dried yeast biomass obtained under optimized conditions from 5 L bioreactor was subjected to a direct transesterification process. Biomass: methanol ratio, catalyst concentration, and time were the variables used to attain higher FAME yield in the transesterification optimization process. RESULTS Under optimized conditions, the highest lipid yield of 2.68 g L-1 was obtained with 15.33 g L-1 of starch content, 0.5 g L-1 of yeast extract, and 5.992 L min-1 of airflow rate in a bioreactor. The optimized direct transesterification process yielded a higher FAME yield of 86.56% at 1:20 biomass: methanol ratio, 0.4 M catalyst concentration, and a time of 6.85 h. CONCLUSIONS Thus, this optimized process rendered the microbial lipids derived from C. tropicalis ASY2 as potentially alternative oil substitutes for sustainable biodiesel production to meet the rising energy demands.
Collapse
Affiliation(s)
- Kiruthika Thangavelu
- Department of Renewable Energy Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - Pugalendhi Sundararaju
- Department of Renewable Energy Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
| | - Naganandhini Srinivasan
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
| | - Sivakumar Uthandi
- Biocatalysts Laboratory, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India.
| |
Collapse
|
6
|
Mhlongo SI, Ezeokoli OT, Roopnarain A, Ndaba B, Sekoai PT, Habimana O, Pohl CH. The Potential of Single-Cell Oils Derived From Filamentous Fungi as Alternative Feedstock Sources for Biodiesel Production. Front Microbiol 2021; 12:637381. [PMID: 33584636 PMCID: PMC7876240 DOI: 10.3389/fmicb.2021.637381] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/07/2021] [Indexed: 11/13/2022] Open
Abstract
Microbial lipids, also known as single-cell oils (SCOs), are highly attractive feedstocks for biodiesel production due to their fast production rates, minimal labor requirements, independence from seasonal and climatic changes, and ease of scale-up for industrial processing. Among the SCO producers, the less explored filamentous fungi (molds) exhibit desirable features such as a repertoire of hydrolyzing enzymes and a unique pellet morphology that facilitates downstream harvesting. Although several oleaginous filamentous fungi have been identified and explored for SCO production, high production costs and technical difficulties still make the process less attractive compared to conventional lipid sources for biodiesel production. This review aims to highlight the ability of filamentous fungi to hydrolyze various organic wastes for SCO production and explore current strategies to enhance the efficiency and cost-effectiveness of the SCO production and recovery process. The review also highlights the mechanisms and components governing lipogenic pathways, which can inform the rational designs of processing conditions and metabolic engineering efforts for increasing the quality and accumulation of lipids in filamentous fungi. Furthermore, we describe other process integration strategies such as the co-production with hydrogen using advanced fermentation processes as a step toward a biorefinery process. These innovative approaches allow for integrating upstream and downstream processing units, thus resulting in an efficient and cost-effective method of simultaneous SCO production and utilization for biodiesel production.
Collapse
Affiliation(s)
- Sizwe I. Mhlongo
- Discipline of Medical Microbiology, School of Laboratory Medicine and Medical Sciences, Medical School, University of KwaZulu-Natal, Durban, South Africa
| | - Obinna T. Ezeokoli
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
| | - Ashira Roopnarain
- Microbiology and Environmental Biotechnology Research Group, Institute for Soil, Climate and Water, Agricultural Research Council, Pretoria, South Africa
| | - Busiswa Ndaba
- Microbiology and Environmental Biotechnology Research Group, Institute for Soil, Climate and Water, Agricultural Research Council, Pretoria, South Africa
| | - Patrick T. Sekoai
- The School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Olivier Habimana
- The School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Carolina H. Pohl
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
| |
Collapse
|
7
|
Current Pretreatment/Cell Disruption and Extraction Methods Used to Improve Intracellular Lipid Recovery from Oleaginous Yeasts. Microorganisms 2021; 9:microorganisms9020251. [PMID: 33513696 PMCID: PMC7910848 DOI: 10.3390/microorganisms9020251] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/23/2020] [Accepted: 12/10/2020] [Indexed: 12/18/2022] Open
Abstract
The production of lipids from oleaginous yeasts involves several stages starting from cultivation and lipid accumulation, biomass harvesting and finally lipids extraction. However, the complex and relatively resistant cell wall of yeasts limits the full recovery of intracellular lipids and usually solvent extraction is not sufficient to effectively extract the lipid bodies. A pretreatment or cell disruption method is hence a prerequisite prior to solvent extraction. In general, there are no recovery methods that are equally efficient for different species of oleaginous yeasts. Each method adopts different mechanisms to disrupt cells and extract the lipids, thus a systematic evaluation is essential before choosing a particular method. In this review, mechanical (bead mill, ultrasonication, homogenization and microwave) and nonmechanical (enzyme, acid, base digestions and osmotic shock) methods that are currently used for the disruption or permeabilization of oleaginous yeasts are discussed based on their principle, application and feasibility, including their effects on the lipid yield. The attempts of using conventional and “green” solvents to selectively extract lipids are compared. Other emerging methods such as automated pressurized liquid extraction, supercritical fluid extraction and simultaneous in situ lipid recovery using capturing agents are also reviewed to facilitate the choice of more effective lipid recovery methods.
Collapse
|
8
|
Kumar V, Thakur IS. Extraction of lipids and production of biodiesel from secondary tannery sludge by in situ transesterification. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2020.100446] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Chen SJ, Kuan IC, Tu YF, Lee SL, Yu CY. Surfactant-assisted in situ transesterification of wet Rhodotorula glutinis biomass. J Biosci Bioeng 2020; 130:397-401. [PMID: 32586661 DOI: 10.1016/j.jbiosc.2020.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/12/2020] [Accepted: 05/24/2020] [Indexed: 10/24/2022]
Abstract
In situ transesterification of oleaginous microbes with short chain alcohol has been developed as a renewable process for the production of biodiesel. Dry biomass is often a requisite for the process to avoid the adverse effect of water on the productivity. As a consequence, large amount of energy consumption is required for prior biomass drying. In this study, the wet biomass of Rhodotorula glutinis, an oleaginous yeast, was used directly in in situ transesterification without biomass drying. The reaction conditions were optimized for the production of fatty acid methyl esters (FAME) and the effects of adding different surfactants were also studied. The highest FAME yield of 110% was achieved with a methanol loading of 1:100 at 90°C for 8 h as catalyzed by 0.36 M H2SO4, and the FAME content was 97%, which meets the 96.5% specified in both European biodiesel standards and Taiwanese biodiesel standards. The addition of 50 mM 3-(N,N-dimethylmyristylammonio)propanesulfonate (3-DMAPS, a zwitterionic surfactant) improved the FAME yield from 69% to 83%, which was obtained with a low methanol loading of 1:10 at 90°C for 10 h. Hence, the production of FAME with wet biomass under optimized reaction conditions was as effective as that with the dry form. This clearly indicates that using wet R. glutinis as the feedstock is feasible for the production of biodiesel by in situ transesterification.
Collapse
Affiliation(s)
- Shih-Jie Chen
- Department of Chemical Engineering and Biotechnology, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
| | - I-Ching Kuan
- Department of Chemical Engineering and Biotechnology, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
| | - Yu-Feng Tu
- Department of Chemical Engineering and Biotechnology, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
| | - Shiow-Ling Lee
- Department of Chemical Engineering and Biotechnology, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
| | - Chi-Yang Yu
- Department of Chemical Engineering and Biotechnology, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan.
| |
Collapse
|
10
|
Bhaumik M, Dhanarajan G, Chopra J, Kumar R, Hazra C, Sen R. Production, partial purification and characterization of a proteoglycan bioemulsifier from an oleaginous yeast. Bioprocess Biosyst Eng 2020; 43:1747-1759. [DOI: 10.1007/s00449-020-02361-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/22/2020] [Indexed: 11/28/2022]
|
11
|
Martinez-Silveira A, Villarreal R, Garmendia G, Rufo C, Vero S. Process conditions for a rapid in situ transesterification for biodiesel production from oleaginous yeasts. ELECTRON J BIOTECHN 2019. [DOI: 10.1016/j.ejbt.2018.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
|
12
|
Patel A, Arora N, Pruthi V, Pruthi PA. A novel rapid ultrasonication-microwave treatment for total lipid extraction from wet oleaginous yeast biomass for sustainable biodiesel production. ULTRASONICS SONOCHEMISTRY 2019; 51:504-516. [PMID: 30082251 DOI: 10.1016/j.ultsonch.2018.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/01/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
Oleaginous yeasts have emerged as a sustainable source of renewable oils for liquid biofuels. However, biodiesel production from them has a few constraints with respect to their cell disruption and lipid extraction techniques. The lipid extraction from oleaginous yeasts commonly includes dewatering and drying of cell biomass, which requires energy and time. The aim of this work was to establish a process for the lipid extraction from wet biomass applying acid catalyzed hot water, as well as microwave, and rapid ultrasonication-microwave treatment together with the conventional Bligh and Dyer method. In the wake of testing all procedures, it was revealed that rapid ultrasonication-microwave treatment has great potential to give high lipid content (70.86% w/w) on the cell dry weight basis. The lipid profile after treatment showed the presence of appropriate quantities of saturated (10.39 ± 0.15%), monounsaturated (76.55 ± 0.19%) and polyunsaturated fatty acids (11.49 ± 0.23%) which further improves biodiesel quality compared to the other methods. To the best of our knowledge, this is the first report of using rapid ultrasonication-microwave treatment for the lipid extraction from wet oleaginous yeast biomass in the literature.
Collapse
Affiliation(s)
- Alok Patel
- Molecular Microbiology Laboratory, Biotechnology Department, Indian Institute of Technology Roorkee (IIT-R), Roorkee, Uttarakhand 247667, India; Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden
| | - Neha Arora
- Molecular Microbiology Laboratory, Biotechnology Department, Indian Institute of Technology Roorkee (IIT-R), Roorkee, Uttarakhand 247667, India
| | - Vikas Pruthi
- Molecular Microbiology Laboratory, Biotechnology Department, Indian Institute of Technology Roorkee (IIT-R), Roorkee, Uttarakhand 247667, India
| | - Parul A Pruthi
- Molecular Microbiology Laboratory, Biotechnology Department, Indian Institute of Technology Roorkee (IIT-R), Roorkee, Uttarakhand 247667, India.
| |
Collapse
|
13
|
Sitepu EK, Jones DB, Zhang Z, Tang Y, Leterme SC, Heimann K, Raston CL, Zhang W. Turbo thin film continuous flow production of biodiesel from fungal biomass. BIORESOURCE TECHNOLOGY 2019; 273:431-438. [PMID: 30466021 DOI: 10.1016/j.biortech.2018.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/03/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Direct biodiesel production from wet fungal biomass may significantly reduce production costs, but there is a lack of fast and cost-effective processing technology. A novel thin film continuous flow process has been applied to study the effects of its operational parameters on fatty acid (FA) extraction and FA to fatty acid methyl ester (FAME) conversion efficiencies. Single factor experiments evaluated the effects of catalyst concentration and water content of biomass, while factorial experimental designs determined the interactions between catalyst concentration and biomass to methanol ratio, flow rate, and rotational speed. Direct transesterification (DT) of wet Mucor plumbeus biomass at ambient temperature and pressure achieved a FA to FAME conversion efficiency of >90% using 3 wt/v % NaOH concentration, if the water content was ≤50% (w/w). In comparison to existing DT methods, this continuous flow processing technology has an estimated 90-94% reduction in energy consumption, showing promise for up-scaling.
Collapse
Affiliation(s)
- Eko K Sitepu
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia; Medical Biotechnology, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia
| | - Darryl B Jones
- Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia; College of Science and Engineering, Flinders University, South Australia 5042, Australia
| | - Zhanying Zhang
- Centre for Tropical Crops and Biocommodities, Queensland University of Technology, Queensland 4001, Australia
| | - Youhong Tang
- Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia; College of Science and Engineering, Flinders University, South Australia 5042, Australia
| | - Sophie C Leterme
- Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia; College of Science and Engineering, Flinders University, South Australia 5042, Australia
| | - Kirsten Heimann
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia; Medical Biotechnology, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia
| | - Colin L Raston
- Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia; College of Science and Engineering, Flinders University, South Australia 5042, Australia
| | - Wei Zhang
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia; Medical Biotechnology, College of Medicine and Public Health, Flinders University, South Australia 5042, Australia.
| |
Collapse
|
14
|
Tarigan JB, Ginting M, Mubarokah SN, Sebayang F, Karo-karo J, Nguyen TT, Ginting J, Sitepu EK. Direct biodiesel production from wet spent coffee grounds. RSC Adv 2019; 9:35109-35116. [PMID: 35530672 PMCID: PMC9074169 DOI: 10.1039/c9ra08038d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 10/25/2019] [Indexed: 11/21/2022] Open
Abstract
Utilization of waste spent coffee grounds (SCG) remains limited and requires pre-treatment before being discarded to avoid pollution to the environment. Lipids contained in SCG could be converted to biodiesel through an in situ transesterification method. Current in situ transesterification of wet SCG biomass, conducted at high reaction temperature to reduce the water effect and reduce reaction time, is energy intensive. A new approach, which combines simultaneous extraction-transesterification in a single step using soxhlet apparatus, was developed to produce biodiesel directly from wet SCG biomass. A homogeneous base catalyst at a concentration of 0.75 M showed better catalytic activity than acid, with hexane as a co-solvent on fatty acid (FA) extraction efficiency and FA to fatty acid methyl ester (FAME) conversion efficiency. Studying the factorial effect of ratio of methanol to hexane and reaction time led to the highest FA to FAME conversion efficiency of 97% at a ratio of 1 : 2 and 30 min reaction time. In addition, the catalyst could be used five times without losing its activity. In term of energy consumption, the reactive extraction soxhlet (RES) method could save 38–99% of energy compared to existing methods. Here, we demonstrate the direct biodiesel production from wet SCG in mild reaction temperature and short reaction time using reactive extraction Soxhlet (RES) method.![]()
Collapse
Affiliation(s)
- Juliati Br. Tarigan
- Department of Chemistry
- Faculty of Mathematics and Natural Sciences
- Universitas Sumatera Utara
- Medan 20155
- Indonesia
| | - Mimpin Ginting
- Department of Chemistry
- Faculty of Mathematics and Natural Sciences
- Universitas Sumatera Utara
- Medan 20155
- Indonesia
| | | | - Firman Sebayang
- Department of Chemistry
- Faculty of Mathematics and Natural Sciences
- Universitas Sumatera Utara
- Medan 20155
- Indonesia
| | - Justaman Karo-karo
- Balai Riset dan Standarisasi Industri
- Kementerian Perindustrian
- Medan 20214
- Indonesia
| | - Trung T. Nguyen
- Department of Food Technology
- An Giang University
- Long Xuyen City
- Vietnam
- Department of Medical Biotechnology
| | - Junedi Ginting
- Department of Physics
- Faculty of Mathematics and Natural Sciences
- Universitas Sumatera Utara
- Medan 20155
- Indonesia
| | - Eko K. Sitepu
- Department of Chemistry
- Faculty of Mathematics and Natural Sciences
- Universitas Sumatera Utara
- Medan 20155
- Indonesia
| |
Collapse
|
15
|
Process optimization involving critical evaluation of oxygen transfer, oxygen uptake and nitrogen limitation for enhanced biomass and lipid production by oleaginous yeast for biofuel application. Bioprocess Biosyst Eng 2018; 41:1103-1113. [DOI: 10.1007/s00449-018-1939-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 04/11/2018] [Indexed: 12/18/2022]
|
16
|
Patel A, Sartaj K, Arora N, Pruthi V, Pruthi PA. Biodegradation of phenol via meta cleavage pathway triggers de novo TAG biosynthesis pathway in oleaginous yeast. JOURNAL OF HAZARDOUS MATERIALS 2017; 340:47-56. [PMID: 28711832 DOI: 10.1016/j.jhazmat.2017.07.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 05/17/2023]
Abstract
Phenol is reported to be one of the most toxic environmental pollutants present in the discharge of various industrial effluents causing a serious threat to the existing biome. Biodegradation of phenol by oleaginous yeast Rhodosporidium kratochvilovae HIMPA1 was found to degrade 1000mg/l phenol. The pathways for phenol degradation by both ortho and meta-cleavage were proposed by the identification of metabolites and enzymatic assays of ring cleavage enzymes in the cell extracts. Results suggest that this oleaginous yeast degrade phenol via meta-cleavage pathway and accumulates a high quantity of lipid content (64.92%; wt/wt) as compared to control glucose synthetic medium (GSM). Meta-cleavage pathway of phenol degradation leads to formation of pyruvate and acetaldehyde. Both these end products feed as precursors for de novo triacylglycerols (TAG) biosynthesis pathway which causes accumulation of TAG in the lipid droplets (LD) of 6.12±0.78μm grown on phenol while 2.38±0.52μm observed on GSM. This was confirmed by fluorescence microscopic images of BODIPY505-515nm stained live yeast cells. GC-MS analysis of extracted total lipid showed enhanced amount of monounsaturated fatty acid (MUFA) which was as 51.87%, 58.33% and 62.98% in presence of 0.5, 0.75 and 1g/l of phenol.
Collapse
Affiliation(s)
- Alok Patel
- Molecular Microbiology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee (IIT R), Roorkee, Uttarakhand, 247667, India
| | - Km Sartaj
- Molecular Microbiology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee (IIT R), Roorkee, Uttarakhand, 247667, India
| | - Neha Arora
- Molecular Microbiology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee (IIT R), Roorkee, Uttarakhand, 247667, India
| | - Vikas Pruthi
- Molecular Microbiology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee (IIT R), Roorkee, Uttarakhand, 247667, India
| | - Parul A Pruthi
- Molecular Microbiology Laboratory, Department of Biotechnology, Indian Institute of Technology Roorkee (IIT R), Roorkee, Uttarakhand, 247667, India.
| |
Collapse
|
17
|
Das S, Zarur Coelho MA, Amaral PFF, Sil J. Development of nutrient media to increase the accumulation of lipids without genetic modification of a lipogenic microorganism. RSC Adv 2017. [DOI: 10.1039/c7ra04026a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Lipid metabolism and citric acid production by Yarrowia lipolytica are metabolically inter-dependent and depletion in citric acid production by proper media development can increase lipid accumulation in Y. lipolytica upto 72% of biomass dry weight.
Collapse
Affiliation(s)
- Subhasish Das
- Department of Biochemical Engineering
- Federal University of Rio de Janeiro
- Brazil
- Triphase Pharmaceuticals Pvt. Ltd
- Mysore – 570016
| | | | | | - Jayeeta Sil
- Department of Biochemical Engineering
- Federal University of Rio de Janeiro
- Brazil
| |
Collapse
|