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Enhancing Biomass and Lipid Production in Messastrum gracile Using Inorganic Carbon Substrates and Alternative Solvents for Lipid Extraction
(2025-03-01)
Pan-utai, Wanida
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Pornpukdeewattana, Soisuda
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Inrung, Wilasinee
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Thurakit, Theera
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Srinophakun, Penjit
Microalgae show promise as a biomass and bioproduct for applications in various industries. The cultivation of microalgae plays a crucial role in optimizing biomass yield and bioproduct accumulation. The provision of inorganic carbon substrates substantially enhances microalgal growth and lipid biosynthesis, resulting in marked increases in the production of biofuels and other bioproducts. This study examined biomass and lipid accumulation in Messastrum gracile IFRPD 1061 under inorganic stress conditions, previously unreported. M. gracile IFRPD 1061 was subjected to varying conditions of inorganic carbon substrates, 1–3 g·L−1 sodium carbonate and bicarbonate concentration, to enhance biomass and lipid accumulation. Optimal productivity levels were observed with sodium bicarbonate addition of 3 g·L−1 and 1 g·L−1 for biomass and lipids, resulting in productivities of 392.64 and 53.57 mg·L−1·d−1, respectively. Results underlined the effectiveness of sodium carbonate and bicarbonate as inorganic carbon sources for stimulating microalgal growth and enhancing the production of high-value products. The extraction of lipids from freeze-dried biomass of M. gracile IFRPD 1061 demonstrated optimal yield using methanol/hexane solvents compared with the control experiments. Lipid extraction yields using methanol/hexane were 42.18% and 46.81% from oven-dried and freeze-dried biomass, respectively. Lipids extracted from oven-dried M. gracile IFRPD 1061 using methanol/hexane/chloroform solvents indicated the potential of methanol/hexane as a solvent for lipid extraction from dry microalgal biomass using an ultrasonic-assisted technique. This study contributes valuable insights into maximizing biofuel and bioproduct production from microalgae, highlighting A. gracilis as a promising candidate for industrial applications.
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Physicochemical, Nutritional, and Antioxidant Properties of Traditionally Fermented Thai Vegetables: A Promising Functional Plant-Based Food
(2024-09-01)
Pan-utai, Wanida
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Settachaimongkon, Sarn
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La-ongkham, Orawan
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Pornpukdeewattana, Soisuda
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Hamwane, Marisa
Fermented plant-based products were gathered from various regions in Thailand and categorized into 10 types of traditional commercial vegetables. Different vegetable materials and natural fermentation methods influence the diverse physical, chemical, nutritional, and functional attributes of the products. All the traditionally fermented Thai vegetable samples collected showed physicochemical properties associated with the fermentation process, contributing to the nutritional and functional quality of the final products. Achieving consistent research results is challenging due to the intricate nature of food matrices and biochemical processes during fermentation. The roles of microorganisms, especially probiotics, are crucial in delivering health benefits through fermented foods. Traditionally fermented Thai vegetable foods contain high levels of total soluble solids, titratable acidity, and salinity in pickled shallot and ginger as a result of the natural fermentation process and the ingredients used. The research findings were confirmed using a hierarchical cluster analysis (HCA)-derived dendrogram pattern. The nutritional compositions, total phenolic contents, and antioxidant activities varied among the different types of vegetables. The correlations among lipid, protein, fiber, total soluble solid (TSSs), total titratable acidity (TTA), and salinity as potential biomarkers in fermented vegetable products were examined. The results suggest that traditionally fermented Thai vegetable products significantly impacted food research by enhancing the quality and preserving the authenticity of traditionally fermented Thai vegetables.
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Arthrospira Cell Residues for Lactic Acid Fermentation as Bioproducts From Waste Utilization
(2022-06-13)
Pan-utai, Wanida
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Thitiprasert, Sitanan
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Pornpukdeewattana, Soisuda
Arthrospira (Spirulina) platensis is a freshwater cyanobacterium that is commercially produced as a food source on a global scale and considered safe for human consumption. After C-phycocyanin (C-PC) extraction, the waste cell residue (WCR) is composed of nutrients with 30% protein content. Here, the potential of WCR as a nitrogen source for Bacillus coagulans cultivation and bioproducts was evaluated. Nitrogen substitute from WCR under different conditions of 20—100 g L−1 was performed. B. coagulans cultivation was achieved with maximal viable cells at 7.6–9.5 log CFU mL−1. Increasing WCR gave decreasing lactate production. The highest lactate production at 27 g L−1 was achieved from WCR 20 g L−1, highlighting the potential use of A. platensis waste biomass residue as a nitrogen source for the growth of lactic acid bacteria and zero-waste biotechnology methodology. The utilization of renewable resources is a crucial step toward developing a sustainable industrial society.
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Combination of mechanical and chemical extraction of astaxanthin from Haematococcus pluvialis and its properties of microencapsulation
(2021-05-01)
Pan-utai, Wanida
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Boonpok, Sirinapa
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Pornpukdeewattana, Soisuda
Astaxanthin is a red pigment that is naturally produced by the freshwater microalga Haematococcus pluvialis. Cell wall thickness of red cyst aplanospores is a barrier for extraction. Astaxanthin extraction from H. pluvialis UTEX 2505 was improved by ultrasonic assistance techniques with various conditions of solvent, extraction time and cycles of extraction to generate maximum recovery. Highest astaxanthin content and extraction yield were obtained using ethyl acetate under ultrasonic treatment for 25 min with five repeated extraction cycles. Encapsulation of astaxanthin was studied at different conditions. Ratio of maltodextrin and gum Arabic at 7.5:2.5 was most suitable for astaxanthin microencapsulation. Increased encapsulation efficiency of astaxanthin powder is suitable for food, pharmaceutical and other natural astaxanthin applications from H. pluvialis.
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Nutrients formulation to maximize Ankistrodesmus sp. microalgal cell biomass and lipid productivities
(2019-01-01)
Pan-utai, Wanida
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Srinophakun, Penjit
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Inrung, Wilasinee
Ankistrodesmus sp. belongs to a group of microalgae which plays a significant role in various applications. Availability of nutrients is one of the primary factors regulating the growth and development of microalgae. Twelve experiments were run to determine the optimum media formulation of significant nutrient components for maximum biomass and lipid productivities of Ankistrodesmus sp. IFRPD 1061 cultivation using Plackett-Burman design. All nutrients significantly affected biomass productivity. Highest lipid productivity may not only necessarily originate from biomass cells with highest lipid content but also depend on nutrient formulation of culture media. Microalgal cell growth rate plays a major role in biomass and lipid production. Some nutrients including phosphorus and sodium did not significantly affect lipid productivity, therefore, optimizing nutrient contents could be applied to further scale-up microalgal production.

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