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Grubišić M, Šantek B, Kuzmić M, Čož-Rakovac R, Ivančić Šantek M. Enhancement of Biomass Production of Diatom Nitzschia sp. S5 through Optimisation of Growth Medium Composition and Fed-Batch Cultivation. Mar Drugs 2024; 22:46. [PMID: 38248671 DOI: 10.3390/md22010046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/08/2024] [Accepted: 01/13/2024] [Indexed: 01/23/2024] Open
Abstract
The growing commercial application of microalgae in different industry sectors, including the production of bioenergy, pharmaceuticals, nutraceuticals, chemicals, feed, and food, demands large quantities of microalgal biomass with specific compositions produced at reasonable prices. Extensive studies have been carried out on the design of new and improvement of current cultivation systems and the optimisation of growth medium composition for high productivity of microalgal biomass. In this study, the concentrations of the main macronutrients, silicon, nitrogen and phosphorus, essential for the growth of diatom Nitzschia sp. S5 were optimised to obtain a high biomass concentration. The effect of main macronutrients on growth kinetics and cell composition was also studied. Silicon had the most significant effect on diatom growth during batch cultivation. The concentration of biomass increased 5.45-fold (0.49 g L-1) at 1 mM silicon concentration in modified growth medium compared to the original Guillard f/2 medium. Optimisation of silicon, nitrogen, and phosphorus quantities and ratios further increased biomass concentration. The molar ratio of Si:N:P = 7:23:1 mol:mol:mol yielded the highest biomass concentration of 0.73 g L-1. Finally, the fed-batch diatom cultivation of diatom using an optimised Guillard f/2 growth medium with four additions of concentrated macronutrient solution resulted in 1.63 g L-1 of microalgal biomass. The proteins were the most abundant macromolecules in microalgal biomass, with a lower content of carbohydrates and lipids under all studied conditions.
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Affiliation(s)
- Marina Grubišić
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Božidar Šantek
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Marija Kuzmić
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Rozelindra Čož-Rakovac
- Laboratory for Aquaculture Biotechnology, Division of Materials Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia
- Center of Excellence for Marine Bioprospecting (BioProCro), Ruđer Bošković Institute, 10000 Zagreb, Croatia
| | - Mirela Ivančić Šantek
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
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Didak Ljubas B, Novak M, Trontel A, Rajković A, Kelemen Z, Marđetko N, Grubišić M, Pavlečić M, Tominac VP, Šantek B. Production of Different Biochemicals by Paenibacillus polymyxa DSM 742 From Pretreated Brewers' Spent Grains. Front Microbiol 2022; 13:812457. [PMID: 35308344 PMCID: PMC8931609 DOI: 10.3389/fmicb.2022.812457] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/11/2022] [Indexed: 11/25/2022] Open
Abstract
Brewers' spent grains (BSG) are a by-product of the brewing industry that is mainly used as feedstock; otherwise, it has to be disposed according to regulations. Due to the high content of glucose and xylose, after pretreatment and hydrolysis, it can be used as a main carbohydrate source for cultivation of microorganisms for production of biofuels or biochemicals like 2,3-butanediol or lactate. 2,3-Butanediol has applications in the pharmaceutical or chemical industry as a precursor for varnishes and paints or in the food industry as an aroma compound. So far, Klebsiella pneumoniae, Serratia marcescens, Clostridium sp., and Enterobacter aerogenes are being used and investigated in different bioprocesses aimed at the production of 2,3-butanediol. The main drawback is bacterial pathogenicity which complicates all production steps in laboratory, pilot, and industrial scales. In our study, a gram-positive GRAS bacterium Paenibacillus polymyxa DSM 742 was used for the production of 2,3-butanediol. Since this strain is very poorly described in literature, bacterium cultivation was performed in media with different glucose and/or xylose concentration ranges. The highest 2,3-butanediol concentration of 18.61 g l-1 was achieved in medium with 70 g l-1 of glucose during 40 h of fermentation. In contrast, during bacterium cultivation in xylose containing medium there was no significant 2,3-butanediol production. In the next stage, BSG hydrolysates were used for bacterial cultivation. P. polymyxa DSM 742 cultivated in the liquid phase of pretreated BSG produced very low 2,3-butanediol and ethanol concentrations. Therefore, this BSG hydrolysate has to be detoxified in order to remove bacterial growth inhibitors. After detoxification, bacterium cultivation resulted in 30 g l-1 of lactate, while production of 2,3-butanediol was negligible. The solid phase of pretreated BSG was also used for bacterium cultivation after its hydrolysis by commercial enzymes. In these cultivations, P. polymyxa DSM 742 produced 9.8 g l-1 of 2,3-butanediol and 3.93 g l-1 of ethanol. On the basis of the obtained results, it can be concluded that different experimental setups give the possibility of directing the metabolism of P. polymyxa DSM 742 toward the production of either 2,3-butanediol and ethanol or lactate.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Božidar Šantek
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb, Croatia
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Grubišić M, Šantek B, Zorić Z, Čošić Z, Vrana I, Gašparović B, Čož-Rakovac R, Ivančić Šantek M. Bioprospecting of Microalgae Isolated from the Adriatic Sea: Characterization of Biomass, Pigment, Lipid and Fatty Acid Composition, and Antioxidant and Antimicrobial Activity. Molecules 2022; 27:molecules27041248. [PMID: 35209036 PMCID: PMC8875609 DOI: 10.3390/molecules27041248] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/25/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
Abstract
Marine microalgae and cyanobacteria are sources of diverse bioactive compounds with potential biotechnological applications in food, feed, nutraceutical, pharmaceutical, cosmetic and biofuel industries. In this study, five microalgae, Nitzschia sp. S5, Nanofrustulum shiloi D1, Picochlorum sp. D3, Tetraselmis sp. Z3 and Tetraselmis sp. C6, and the cyanobacterium Euhalothece sp. C1 were isolated from the Adriatic Sea and characterized regarding their growth kinetics, biomass composition and specific products content (fatty acids, pigments, antioxidants, neutral and polar lipids). The strain Picochlorum sp. D3, showing the highest specific growth rate (0.009 h−1), had biomass productivity of 33.98 ± 0.02 mg L−1 day−1. Proteins were the most abundant macromolecule in the biomass (32.83–57.94%, g g−1). Nanofrustulum shiloi D1 contained significant amounts of neutral lipids (68.36%), while the biomass of Picochlorum sp. D3, Tetraselmis sp. Z3, Tetraselmis sp. C6 and Euhalothece sp. C1 was rich in glycolipids and phospholipids (75%). The lipids of all studied microalgae predominantly contained unsaturated fatty acids. Carotenoids were the most abundant pigments with the highest content of lutein and neoxanthin in representatives of Chlorophyta and fucoxanthin in strains belonging to the Bacillariophyta. All microalgal extracts showed antioxidant activity and antimicrobial activity against Gram-negative E. coli and S. typhimurium and Gram-positive S. aureus.
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Affiliation(s)
- Marina Grubišić
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.G.); (B.Š.); (Z.Z.); (Z.Č.)
| | - Božidar Šantek
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.G.); (B.Š.); (Z.Z.); (Z.Č.)
| | - Zoran Zorić
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.G.); (B.Š.); (Z.Z.); (Z.Č.)
| | - Zrinka Čošić
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.G.); (B.Š.); (Z.Z.); (Z.Č.)
| | - Ivna Vrana
- Laboratory for Marine and Atmospheric Biogeochemistry, Division for Marine and Environmental Research, Ruđer Bošković Institute, 10000 Zagreb, Croatia; (I.V.); (B.G.)
| | - Blaženka Gašparović
- Laboratory for Marine and Atmospheric Biogeochemistry, Division for Marine and Environmental Research, Ruđer Bošković Institute, 10000 Zagreb, Croatia; (I.V.); (B.G.)
| | - Rozelindra Čož-Rakovac
- Laboratory for Aquaculture Biotechnology, Division of Materials Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia;
- Center of Excellence for Marine Bioprospecting (BioProCro), Ruđer Bošković Institute, 10000 Zagreb, Croatia
| | - Mirela Ivančić Šantek
- Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.G.); (B.Š.); (Z.Z.); (Z.Č.)
- Correspondence:
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Marđetko N, Trontel A, Novak M, Pavlečić M, Ljubas BD, Grubišić M, Tominac VP, Ludwig R, Šantek B. Screening of Lignocellulolytic Enzyme Activities in Fungal Species and Sequential Solid-State and Submerged Cultivation for the Production of Enzyme Cocktails. Polymers (Basel) 2021; 13:3736. [PMID: 34771293 PMCID: PMC8588072 DOI: 10.3390/polym13213736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Various fungal species can degrade lignocellulolytic materials with their enzyme cocktails composed of cellulolytic and lignolytic enzymes. In this work, seven fungal species (Mucor indicus DSM 2185, Paecilomyces variotii CBS 372.70, Myceliophthora thermophila CBS 663.74, Thielavia terrestris CBS 456.75, Botryosphaeria dothidea JCM 2738, Fusarium oxysporum f.sp. langenariae JCM 9293, and Fusarium verticillioides JCM 23107) and four nutrient media were used in the screening for effective lignocellulose degrading enzymes. From the seven tested fungi, F. oxysporum and F. verticilliodes, along with nutrient medium 4, were selected as the best medium and producers of lignocellulolytic enzymes based on the determined xylanase (>4 U mg-1) and glucanase activity (≈2 U mg-1). Nutrient medium 4 supplemented with pretreated corn cobs was used in the production of lignocellulolytic enzymes by sequential solid-state and submerged cultivation of F. oxysporum, F. verticilliodes, and a mixed culture of both strains. F. oxysporum showed 6 times higher exoglucanase activity (3.33 U mg-1) after 5 days of cultivation in comparison with F. verticillioides (0.55 U mg-1). F. oxysporum also showed 2 times more endoglucanase activity (0.33 U mg-1). The mixed culture cultivation showed similar endo- and exoglucanase activities compared to F. oxysporum (0.35 U mg-1; 7.84 U mg-1). Maximum xylanase activity was achieved after 7 days of cultivation of F. verticilliodes (≈16 U mg-1), while F. oxysporum showed maximum activity after 9 days that was around 2 times lower compared to that of F. verticilliodes. The mixed culture achieved maximum xylanase activity after only 4 days, but the specific activity was similar to activities observed for F. oxysporum. It can be concluded that both fungal strains can be used as producers of enzyme cocktails for the degradation of lignocellulose containing raw materials, and that corn cobs can be used as an inducer for enzyme production.
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Affiliation(s)
- Nenad Marđetko
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Antonija Trontel
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Mario Novak
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Mladen Pavlečić
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Blanka Didak Ljubas
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Marina Grubišić
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Vlatka Petravić Tominac
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
| | - Roland Ludwig
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU—University of Natural Resources and Life Sciences, 1190 Vienna, Austria;
| | - Božidar Šantek
- Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology, Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (N.M.); (A.T.); (M.N.); (M.P.); (B.D.L.); (M.G.); (V.P.T.)
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Ivančić Šantek M, Grubišić M, Galić Perečinec M, Beluhan S, Šantek B. Lipid production by Mortierella isabellina from pretreated corn cobs and effect of lignocellulose derived inhibitors on growth and lipid synthesis. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Microalgae have been recognized as powerful phototrophic cell-factories whose applications range from biomass production for food and feed purposes to the production of high-value products and biofuels. Microalgae have been considered a source of functional ingredients, such as polyunsaturated fatty acids, polysaccharides, essential minerals, vitamins and bioactive peptides that can have positive effects on human and animal health. Besides having high nutritional value due to the high percentage of proteins in their composition, microalgae generate high-value products, such as pigments, polysaccharides, bio-hydrogen, and even bio-polyesters with plastic-like properties. Algal biomass that remains after product recovery can be used as forage, biofertilizer or feedstock for biogas production. This step in overall algal production is important from an economic point of view due to the reduction in production costs. This paper presents the detailed study of the biotechnologically most important microalgae strains, and the design principles of photobioreactors for their cultivation. In addition, the main existing and potential high-value products derivable from microalgae, as well as utilization of microalgae for phytoremediation and biogas production, were reviewed.
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Affiliation(s)
- Marina Grubišić
- University of Zagreb, Faculty of Food technology and Biotechnology, Department of Biochemical Engineering, Laboratory of Biochemical Engineering, Industrial Microbiology, Malting and Brewing Technology
| | - Mirela Ivančić Šantek
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of zagreb
| | - Božidar Šantek
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb
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Planinc M, Sutlić Ž, Rudež I, Barić D, Unić D, Blažeković R, Grubišić M, Varvodić J, Starčević B, Planinc D. Results of heart transplantation: 18 years experience in University Hospital Dubrava, Zagreb. J Cardiothorac Surg 2013. [PMCID: PMC3844639 DOI: 10.1186/1749-8090-8-s1-o151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- M Planinc
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - Ž Sutlić
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - I Rudež
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - D Barić
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - D Unić
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - R Blažeković
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - M Grubišić
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - J Varvodić
- Department of Cardiac and Transplant Surgery, University Hospital Dubrava, Zagreb, Croatia
| | - B Starčević
- Department of Cardiovascular Diseases, University Hospital Dubrava, Zagreb, Croatia
| | - D Planinc
- Department of Cardiology, University Clinical Center Sisters of Mercy, Zagreb, Croatia
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