1
|
Zou X, Zhao S, Xu K, Fang C, Shen Z, Yan C, Dong L, Qin Z, Zhao X, Zhao J, Liang X. Eco-friendly microalgae harvesting using lipid-cored particles with a comparative life-cycle assessment. BIORESOURCE TECHNOLOGY 2024; 392:130023. [PMID: 37972903 DOI: 10.1016/j.biortech.2023.130023] [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: 10/26/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023]
Abstract
This study proposed an innovative approach using lipid-cored particles (LCPs) aimed at addressing the efficiency, cost, and environmental impact challenges in microalgae harvesting. Cetyltrimethylammonium bromide (CTAB) and chitosan (CS) were used to modify LCPs and to optimize efficiency and investigate the mechanisms of harvesting with Chlorella vulgaris. Results showed that a maximum harvesting efficiency of 97.14 % was achieved using CS-LCPs. Zeta potential and microscopic images revealed the presence of embedded CS-LCPs within microalgal flocs. Fractal dimension data suggested looser aggregates of CS-LCPs and Chlorella vulgaris, corroborated by Excitation-emission matrices (EEM) analysis further confirmation the presence of bridging networks. Moreover, life cycle assessment of five harvesting methods pointed freshwater ecotoxicity potential (FEP) and terrestrial ecotoxicity potential (TEP) as major environmental impacts, mainly from flocculant use, carrier production, and electricity consumption. Notably, LCPs showed the lowest global warming potential (GWP) at 1.54 kg CO2 eq, offering a viable, low-carbon, cost-effective harvesting alternative.
Collapse
Affiliation(s)
- Xiaotong Zou
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China; School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, 710048, China.
| | - Shaohua Zhao
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Kaiwei Xu
- College of Computer Science and Technology, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Changqing Fang
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China; School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, 710048, China.
| | - Zhou Shen
- School of Life and Environmental Sciences, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, China
| | - Chang Yan
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Liming Dong
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Zhaoyue Qin
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Xinyue Zhao
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Jiajia Zhao
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| | - Xiongbo Liang
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, China
| |
Collapse
|
2
|
Refaey MM, Mehrim AI, Zenhom OA, Areda HA, Ragaza JA, Hassaan MS. Fresh Azolla, Azolla pinnata as a Complementary Feed for Oreochromis niloticus: Growth, Digestive Enzymes, Intestinal Morphology, Physiological Responses, and Flesh Quality. AQUACULTURE NUTRITION 2023; 2023:1403704. [PMID: 36860973 PMCID: PMC9973131 DOI: 10.1155/2023/1403704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Azolla is a potential fish feed ingredient due to its high nutritional value, abundant production, and low price. This study is aimed at evaluating the use of fresh green azolla (FGA) as a replacement ratio of the daily feed intake on the growth, digestive enzymes, hematobiochemical indices, antioxidant response, intestinal histology, body composition, and flesh quality of monosex Nile tilapia, Oreochromis niloticus (with an average initial weight of 108.0 ± 5.0 g). Five experimental groups were used and differed in commercial feed replacement rates of 0% (T 0), 10% (T 1), 20% (T 2), 30% (T 3), and 40% (T 4) with FGA for 70 days. Results showed that 20% replacement with azolla gave the highest values of growth performance and hematological parameters and the best feed conversion ratio, protein efficiency ratio, and fish whole body protein content. The highest levels of intestinal chymotrypsin, trypsin, lipase, and amylase were noted in 20% replacement with azolla. Fish fed diets with FGA levels of 10% and 40% showed the highest values for the thickness of the mucosa and submucosa layers among all treatments, respectively, while the length and width of the villi decreased significantly. No significant (P > 0.05) differences in the activities of serum alanine transaminase, aspartate transaminase, and creatinine were detected among treatments. The hepatic total antioxidant capacity and the activities of catalase and superoxide dismutase significantly (P < 0.05) increased while the activity of malonaldehyde decreased with increasing the replacement levels of FGA up to 20%. With increasing levels of dietary replacement with FGA, muscular pH, stored loss (%), and frozen leakage rate (%) were significantly decreased. Finally, it was concluded that the dietary replacement of 20% FGA or less may be considered a promising feeding protocol for monosex Nile tilapia, which may lead to high fish growth, quality, profitability, and sustainability for the tilapia production sector.
Collapse
Affiliation(s)
- Mohamed M. Refaey
- Animal Production Department, Faculty of Agriculture, Mansoura University, PO 35516 Al Mansoura, Egypt
| | - Ahmed I. Mehrim
- Animal Production Department, Faculty of Agriculture, Mansoura University, PO 35516 Al Mansoura, Egypt
| | - Osama A. Zenhom
- Central Laboratory for Aquaculture Research, Agriculture Research Center, Abbasa, Abou Hammad, Egypt
| | - Hamada A. Areda
- Animal Production Department, Faculty of Agriculture, Damietta University, Egypt
| | - Janice A. Ragaza
- Ateneo Aquatic and Fisheries Resources Laboratory, Department of Biology, School of Science and Engineering, Ateneo de Manila University, Katipunan Ave., Loyola Hts., Quezon City, NCR, Philippines 1108
| | - Mohamed S. Hassaan
- Animal Production Department, Faculty of Agriculture, Benha University, Benha, Egypt
| |
Collapse
|
3
|
Regulation of Heat Stress in Physcomitrium (Physcomitrella) patens Provides Novel Insight into the Functions of Plant RNase H1s. Int J Mol Sci 2022; 23:ijms23169270. [PMID: 36012542 PMCID: PMC9409398 DOI: 10.3390/ijms23169270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/02/2022] [Accepted: 08/13/2022] [Indexed: 11/17/2022] Open
Abstract
RNase H1s are associated with growth and development in both plants and animals, while the roles of RNase H1s in bryophytes have been rarely reported. Our previous data found that PpRNH1A, a member of the RNase H1 family, could regulate the development of Physcomitrium (Physcomitrella) patens by regulating the auxin. In this study, we further investigated the biological functions of PpRNH1A and found PpRNH1A may participate in response to heat stress by affecting the numbers and the mobilization of lipid droplets and regulating the expression of heat-related genes. The expression level of PpRNH1A was induced by heat stress (HS), and we found that the PpRNH1A overexpression plants (A-OE) were more sensitive to HS. At the same time, A-OE plants have a higher number of lipid droplets but with less mobility in cells. Consistent with the HS sensitivity phenotype in A-OE plants, transcriptomic analysis results indicated that PpRNH1A is involved in the regulation of expression of heat-related genes such as DNAJ and DNAJC. Taken together, these results provide novel insight into the functions of RNase H1s.
Collapse
|
4
|
Efficient Bioflocculation of Chlorella vulgaris with a Chitosan and Walnut Protein Extract. BIOLOGY 2021; 10:biology10050352. [PMID: 33919407 PMCID: PMC8143315 DOI: 10.3390/biology10050352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 11/29/2022]
Abstract
Simple Summary With the increase in population size, global climate changes, and the improvement of living standards, the fossil fuel resources may run out in the future. Microalgae have been considered the next generation of sustainable and renewable feedstock to produce biofuel and a large spectrum of high-value products, such as healthy oils, carotenoids, and proteins. Unlike terrestrial plants, the production of added-value chemicals from microalgal species is not seasonal; they can be grown under climate-independent conditions in bioreactors; can use wastewater as a source of nutrients, contributing to wastewater treatment; and can convert CO2 into organic compounds more efficiently. However, the utilization of microalgal biomass is heavily dependent on microalgal biomass harvesting and concentration technology. Flocculation represents a relatively low-cost and efficient approach for the harvesting of microalgal biomass at a large scale. However, in traditional flocculation, most of the chemical flocculants covalently bind to the microalgal surfaces, contaminating the final product, which significantly limits their application. This study aims to develop an efficient and convenient bioflocculation technique to harvest microalgae. Abstract Bioflocculation represents an attractive technology for harvesting microalgae with the potential additive effect of flocculants on the production of added-value chemicals. Chitosan, as a cationic polyelectrolyte, is widely used as a non-toxic, biodegradable bioflocculant for many algal species. The high cost of chitosan makes its large-scale application economically challenging, which triggered research on reducing its amount using co-flocculation with other components. In our study, chitosan alone at a concentration 10 mg/L showed up to an 89% flocculation efficiency for Chlorella vulgaris. Walnut protein extract (WPE) alone showed a modest level (up to 40%) of flocculation efficiency. The presence of WPE increased chitosan’s flocculation efficiency up to 98% at a reduced concentration of chitosan (6 mg/L). Assessment of co-flocculation efficiency at a broad region of pH showed the maximum harvesting efficiency at a neutral pH. Fourier transform infrared spectroscopy, floc size analysis, and microscopy suggested that the dual flocculation with chitosan and walnut protein is a result of the chemical interaction between the components that form a web-like structure, enhancing the bridging and sweeping ability of chitosan. Co-flocculation of chitosan with walnut protein extract, a low-value leftover from walnut oil production, represents an efficient and relatively cheap system for microalgal harvesting.
Collapse
|
5
|
Nekrasov EV, Tallon SJ, Vyssotski MV, Catchpole OJ. Extraction of lipids from New Zealand fern fronds using near-critical dimethyl ether and dimethyl ether–water–ethanol mixtures. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2020.105137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
6
|
ABRAHAM GERARD, JAISWAL PRANITA, SINGH YUDHVIR, YADAV RAVINDRAKUMAR, KUMAR RAVINDRA, MUDGAL VISHAL, SINGH PAWANKUMAR. Perspectives on the utilization of Azolla-Anabaena system as feed supplement. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2021. [DOI: 10.56093/ijans.v90i9.109441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The nitrogen fixing aquatic pteridophyte Azolla is one of the fastest growing nitrogen-fixing plants and it is used as a potential source for high rate biomass production. Azolla has the ability to fix atmospheric nitrogen at cheaper and faster rates due to the presence of a symbiotic cyanobacterium Anabaena azollae. Therefore, the ability to fix atmospheric nitrogen is important from an agricultural perspective. However, Azolla is gaining popularity as feed supplement for cattle, poultry and fish. Further, the ease of cultivation and favourable nutrient composition make Azolla an important feed supplement. This review focuses on the perspectives of Azolla as feed supplement.
Collapse
|
7
|
Tran TLN, Miranda AF, Abeynayake SW, Mouradov A. Differential Production of Phenolics, Lipids, Carbohydrates and Proteins in Stressed and Unstressed Aquatic Plants, Azolla filiculoides and Azolla pinnata. BIOLOGY 2020; 9:biology9100342. [PMID: 33086671 PMCID: PMC7603371 DOI: 10.3390/biology9100342] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 12/23/2022]
Abstract
The metabolic plasticity of shikimate and phenylpropanoid pathways redirects carbon flow to different sink products in order to protect sessile plants from environmental stresses. This study assessed the biochemical responses of two Azolla species, A. filiculoides and A. pinnata, to the combined effects of environmental and nutritional stresses experienced while growing outdoors under Australian summer conditions. These stresses triggered a more than 2-fold increase in the production of total phenols and their representatives, anthocyanins (up to 18-fold), flavonoids (up to 4.7-fold), and condensed tannins (up to 2.7-fold), which led to intense red coloration of the leaves. These changes were also associated with an increase in the concentration of carbohydrates and a decrease in concentrations of lipids and total proteins. Changes in lipid biosynthesis did not cause significant changes in concentrations of palmitoleic acid (C16:0), linolenic acid (C18:3), and linoleic acid (C18:2), the fatty acid signatures of Azolla species. However, a reduction in protein production triggered changes in biosynthesis of alanine, arginine, leucine, tyrosine, threonine, valine, and methionine amino acids. Stress-triggered changes in key nutritional components, phenolics, lipids, proteins, and carbohydrates could have a significant impact on the nutritional value of both Azolla species, which are widely used as a sustainable food supplement for livestock, poultry, and fish industries.
Collapse
Affiliation(s)
- Thi Linh Nham Tran
- School of Sciences, RMIT University, Bundoora, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (S.W.A.)
- Faculty of Agriculture, Bac Lieu University, 8 wards, Bac Lieu 960000, Vietnam
| | - Ana F. Miranda
- School of Sciences, RMIT University, Bundoora, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (S.W.A.)
| | - Shamila Weerakoon Abeynayake
- School of Sciences, RMIT University, Bundoora, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (S.W.A.)
- Department of Animal, Plant and Soil Sciences, Centre for AgriBiosciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Aidyn Mouradov
- School of Sciences, RMIT University, Bundoora, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (S.W.A.)
- Correspondence: ; Tel.: +61-3-99257144
| |
Collapse
|
8
|
Chupaza MH, Park YR, Kim SH, Yang JW, Jeong GT, Kim SK. Bioethanol Production from Azolla filiculoides by Saccharomyces cerevisiae, Pichia stipitis, Candida lusitaniae, and Kluyveromyces marxianus. Appl Biochem Biotechnol 2020; 193:502-514. [PMID: 33026615 DOI: 10.1007/s12010-020-03437-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/29/2020] [Indexed: 10/23/2022]
Abstract
Ethanol was produced by separate hydrolysis and fermentation using Azolla filiculoides as a biomass. Thermal acid hydrolysis and enzymatic saccharification were used as pretreatment methods to produce monosaccharides from Azolla. The optimal content for thermal acid hydrolysis of 14% (w/v) Azolla weed slurry produced 16.7-g/L monosaccharides by using 200 mM H2SO4 at 121 °C for 60 min. Enzymatic saccharification using 16 U/mL Viscozyme produced 61.6 g/L monosaccharide at 48 h. Ethanol productions with ethanol yield coefficients from Azolla weed hydrolysate using Kluyveromyces marxianus, Candida lusitaniae Saccharomyces cerevisiae, and Pichia stipitis were 26.8 g/L (YEtOH = 0.43), 23.2 g/L (YEtOH = 0.37), 18.2 g/L (YEtOH = 0.29), and 13.7 g/L (YEtOH = 0.22), respectively. Saccharomyces cerevisiae produces the lowest yield as it utilized only glucose. Bioethanol from Azolla weed hydrolysate can be successfully produced by using Kluyveromyces marxianus because it consumed the mixture of glucose and xylose completely within 60 h.
Collapse
Affiliation(s)
- Mariam H Chupaza
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea.,KOICA-PKNU International Graduate Program of Fisheries Science, Pukyong National University, Busan, 48513, Republic of Korea.,Department of Fishing and Fish Processing, Fisheries Education and Training Agency, P.O. Box 83, Bagamoyo, Costal Region, Tanzania
| | - Yu-Rim Park
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea
| | - So Hee Kim
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea
| | - Ji Won Yang
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea
| | - Gwi-Teak Jeong
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea
| | - Sung-Koo Kim
- School of Marine Fisheries, and Life Science (Major in Biotechnology), Pukyong National University, 48513, Busan, Republic of Korea.
| |
Collapse
|
9
|
Nham Tran TL, Miranda AF, Mouradov A, Adhikari B. Physicochemical Characteristics of Protein Isolated from Thraustochytrid Oilcake. Foods 2020; 9:foods9060779. [PMID: 32545411 PMCID: PMC7353575 DOI: 10.3390/foods9060779] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 05/31/2020] [Accepted: 06/08/2020] [Indexed: 01/30/2023] Open
Abstract
The oil from thraustochytrids, unicellular heterotrophic marine protists, is increasingly used in the food and biotechnological industries as it is rich in omega-3 fatty acids, squalene and a broad spectrum of carotenoids. This study showed that the oilcake, a by-product of oil extraction, is equally valuable as it contained 38% protein/dry mass, and thraustochytrid protein isolate can be obtained with 92% protein content and recovered with 70% efficiency. The highest and lowest solubilities of proteins were observed at pH 12.0 and 4.0, respectively, the latter being its isoelectric point. Aspartic acid, glutamic acid, histidine, and arginine were the most abundant amino acids in proteins. The arginine-to-lysine ratio was higher than one, which is desired in heart-healthy foods. The denaturation temperature of proteins ranged from 167.8–174.5 °C, indicating its high thermal stability. Proteins also showed high emulsion activity (784.1 m2/g) and emulsion stability (209.9 min) indices. The extracted omega-3-rich oil melted in the range of 30–34.6 °C and remained stable up to 163–213 °C. This study shows that thraustochytrids are not only a valuable source of omega 3-, squalene- and carotenoid-containing oils, but are also rich in high-value protein with characteristics similar to those from oilseeds.
Collapse
Affiliation(s)
- Thi Linh Nham Tran
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
- Faculty of Agriculture Bac Lieu University, 8 wards, Bac Lieu 960000, Vietnam
| | - Ana F. Miranda
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
| | - Aidyn Mouradov
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
- Correspondence: ; Tel.: +61-3-99257144
| | - Benu Adhikari
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
| |
Collapse
|
10
|
Miranda AF, Nham Tran TL, Abramov T, Jehalee F, Miglani M, Liu Z, Rochfort S, Gupta A, Cheirsilp B, Adhikari B, Puri M, Mouradov A. Marine Protists and Rhodotorula Yeast as Bio-Convertors of Marine Waste into Nutrient-Rich Deposits for Mangrove Ecosystems. Protist 2020; 171:125738. [PMID: 32544845 DOI: 10.1016/j.protis.2020.125738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/15/2020] [Accepted: 04/22/2020] [Indexed: 01/27/2023]
Abstract
This paper represents a comprehensive study of two new thraustochytrids and a marine Rhodotorula red yeast isolated from Australian coastal waters for their abilities to be a potential renewable feedstock for the nutraceutical, food, fishery and bioenergy industries. Mixotrophic growth of these species was assessed in the presence of different carbon sources: glycerol, glucose, fructose, galactose, xylose, and sucrose, starch, cellulose, malt extract, and potato peels. Up to 14g DW/L (4.6gDW/L-day and 2.8gDW/L-day) of biomass were produced by Aurantiochytrium and Thraustochytrium species, respectively. Thraustochytrids biomass contained up to 33% DW of lipids, rich in omega-3 polyunsaturated docosahexaenoic acid (C22:6, 124mg/g DW); up to 10.2mg/gDW of squalene and up to 61μg/gDW of total carotenoids, composed of astaxanthin, canthaxanthin, echinenone, and β-carotene. Along with the accumulation of these added-value chemicals in biomass, thraustochytrid representatives showed the ability to secrete extracellular polysaccharide matrixes containing lipids and proteins. Rhodotorula sp lipids (26% DW) were enriched in palmitic acid (C16:0, 18mg/gDW) and oleic acid (C18:1, 41mg/gDW). Carotenoids (87μg/gDW) were mainly represented by β-carotene (up to 54μg/gDW). Efficient growth on organic and inorganic sources of carbon and nitrogen from natural and anthropogenic wastewater pollutants along with intracellular and extracellular production of valuable nutrients makes the production of valuable chemicals from isolated species economical and sustainable.
Collapse
Affiliation(s)
- Ana F Miranda
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | | | - Tomer Abramov
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Faridah Jehalee
- School of Sciences, RMIT University, Melbourne, VIC, Australia; Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Thailand
| | - Mohini Miglani
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Zhiqian Liu
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC 3083, Australia
| | - Simone Rochfort
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC 3083, Australia
| | - Adarsha Gupta
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Benjamas Cheirsilp
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Thailand
| | - Benu Adhikari
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Munish Puri
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Aidyn Mouradov
- School of Sciences, RMIT University, Melbourne, VIC, Australia.
| |
Collapse
|
11
|
Miranda AF, Kumar NR, Spangenberg G, Subudhi S, Lal B, Mouradov A. Aquatic Plants, Landoltia punctata, and Azolla filiculoides as Bio-Converters of Wastewater to Biofuel. PLANTS (BASEL, SWITZERLAND) 2020; 9:E437. [PMID: 32244834 PMCID: PMC7238415 DOI: 10.3390/plants9040437] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 12/17/2022]
Abstract
The aquatic plants, Azolla filiculoides, and Landoltia punctate, were used as complementing phytoremediators of wastewater containing high levels of phosphate, which simulates the effluents from textile, dyeing, and laundry detergent industries. Their complementarities are based on differences in capacities to uptake nitrogen and phosphate components from wastewater. Sequential treatment by L. punctata followed by A. filiculoides led to complete removal of NH4, NO3, and up to 93% reduction of PO4. In experiments where L. punctata treatment was followed by fresh L. punctata, PO4 concentration was reduced by 65%. The toxicity of wastewater assessed by shrimps, Paratya australiensis, showed a four-fold reduction of their mortality (LC50 value) after treatment. Collected dry biomass was used as an alternative carbon source for heterotrophic marine protists, thraustochytrids, which produced up to 35% dry weight of lipids rich in palmitic acid (50% of total fatty acids), the key fatty acid for biodiesel production. The fermentation of treated L. punctata biomass by Enterobacter cloacae yielded up to 2.14 mol H2/mole of reduced sugar, which is comparable with leading terrestrial feedstocks. A. filiculoides and L. punctata can be used as a new generation of feedstock, which can treat different types of wastewater and represent renewable and sustainable feedstock for bioenergy production.
Collapse
Affiliation(s)
- Ana F. Miranda
- School of Sciences, RMIT University, Bundoora West Campus, Bundoora VIC 3083, Australia;
| | - N. Ram Kumar
- The Energy and Resources Institute, New Delhi 110 003, India; (N.R.K.); (S.S.); (B.L.)
| | - German Spangenberg
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora VIC 3083, Australia;
- School of Applied Systems Biology, La Trobe University, Bundoora VIC 3086, Australia
| | - Sanjukta Subudhi
- The Energy and Resources Institute, New Delhi 110 003, India; (N.R.K.); (S.S.); (B.L.)
| | - Banwari Lal
- The Energy and Resources Institute, New Delhi 110 003, India; (N.R.K.); (S.S.); (B.L.)
| | - Aidyn Mouradov
- School of Sciences, RMIT University, Bundoora West Campus, Bundoora VIC 3083, Australia;
| |
Collapse
|
12
|
Nham Tran TL, Miranda AF, Gupta A, Puri M, Ball AS, Adhikari B, Mouradov A. The Nutritional and Pharmacological Potential of New Australian Thraustochytrids Isolated from Mangrove Sediments. Mar Drugs 2020; 18:E151. [PMID: 32155832 PMCID: PMC7142457 DOI: 10.3390/md18030151] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 02/28/2020] [Accepted: 03/04/2020] [Indexed: 01/07/2023] Open
Abstract
Mangrove sediments represent unique microbial ecosystems that act as a buffer zone, biogeochemically recycling marine waste into nutrient-rich depositions for marine and terrestrial species. Marine unicellular protists, thraustochytrids, colonizing mangrove sediments have received attention due to their ability to produce large amounts of long-chain ω3-polyunsaturated fatty acids. This paper represents a comprehensive study of two new thraustochytrids for their production of valuable biomolecules in biomass, de-oiled cakes, supernatants, extracellular polysaccharide matrixes, and recovered oil bodies. Extracted lipids (up to 40% of DW) rich in polyunsaturated fatty acids (up to 80% of total fatty acids) were mainly represented by docosahexaenoic acid (75% of polyunsaturated fatty acids). Cells also showed accumulation of squalene (up to 13 mg/g DW) and carotenoids (up to 72 µg/g DW represented by astaxanthin, canthaxanthin, echinenone, and β-carotene). Both strains showed a high concentration of protein in biomass (29% DW) and supernatants (2.7 g/L) as part of extracellular polysaccharide matrixes. Alkalinization of collected biomass represents a new and easy way to recover lipid-rich oil bodies in the form of an aqueous emulsion. The ability to produce added-value molecules makes thraustochytrids an important alternative to microalgae and plants dominating in the food, pharmacological, nutraceutical, and cosmetics industries.
Collapse
Affiliation(s)
- Thi Linh Nham Tran
- School of Sciences, Royal Melbourne Institute of Technology University, 3083 Bundoora, Australia; (T.L.N.T.); (A.F.M.); (A.S.B.); (B.A.)
| | - Ana F. Miranda
- School of Sciences, Royal Melbourne Institute of Technology University, 3083 Bundoora, Australia; (T.L.N.T.); (A.F.M.); (A.S.B.); (B.A.)
| | - Adarsha Gupta
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, 5042 Adelaide, Australia; (A.G.); (M.P.)
| | - Munish Puri
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, 5042 Adelaide, Australia; (A.G.); (M.P.)
| | - Andrew S. Ball
- School of Sciences, Royal Melbourne Institute of Technology University, 3083 Bundoora, Australia; (T.L.N.T.); (A.F.M.); (A.S.B.); (B.A.)
| | - Benu Adhikari
- School of Sciences, Royal Melbourne Institute of Technology University, 3083 Bundoora, Australia; (T.L.N.T.); (A.F.M.); (A.S.B.); (B.A.)
| | - Aidyn Mouradov
- School of Sciences, Royal Melbourne Institute of Technology University, 3083 Bundoora, Australia; (T.L.N.T.); (A.F.M.); (A.S.B.); (B.A.)
| |
Collapse
|
13
|
Pirbazari SM, Norouzi O, Kohansal K, Tavasoli A. Experimental studies on high-quality bio-oil production via pyrolysis of Azolla by the use of a three metallic/modified pyrochar catalyst. BIORESOURCE TECHNOLOGY 2019; 291:121802. [PMID: 31352164 DOI: 10.1016/j.biortech.2019.121802] [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: 05/25/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
In this study, the potential of the pyrolysis method to overcome the negative effects of Azolla-filiculoides in infected areas was thoroughly investigated. Non-catalytic pyrolysis experiments were conducted at a temperature range of 400-700 °C. The highest possible bio-oil yield (35 wt%) was attained at 500 °C. To achieve the best chemical composition of bio-oil and higher amount of synthesis gas the catalytic pyrolysis were conducted in a dual-bed quartz reactor at the optimum temperature (500 °C). Although, all three catalysts (pyro-char, modified pyro-char (MPC), and Mg-Ni-Mo/MPC) showed almost an impressive performance in promotion of the common reactions, Mg-Ni-Mo/MPC catalyst have illustrated the stunning results by increasing the percentage of furan compounds from 5.25% to 33.07%, and decreasing the acid compounds from 25.56% to 9.09%. Using GC-MS and GC-FID liquid and gaseous products were fully analyzed. The carbon-based catalysts were also evaluated via FTIR, FESEM, EDX, and BET analyses.
Collapse
Affiliation(s)
- S M Pirbazari
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Omid Norouzi
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Komeil Kohansal
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Ahmad Tavasoli
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| |
Collapse
|
14
|
Yan B, Xu X, Gu Y, Zhao Y, Zhao X, He L, Zhao C, Li Z, Xu J. Genome-wide characterization and expression profiling of diacylglycerol acyltransferase genes from maize. Genome 2018; 61:735-743. [PMID: 30092654 DOI: 10.1139/gen-2018-0029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Diacylglycerol acyltransferase (DGAT) catalyzes the only rate-limiting step in the pathway of plant oil (TAG) biosynthesis and is involved in plant development. In this study, five DGAT family members were identified from maize genome database. Phylogenetic analysis classified the ZmDGATs into type-I, II, and III clusters. Conserved functional domain analysis revealed that the proteins encoded by ZmDGAT1 contained conserved MBOAT domains, while two ZmDGAT2-encoding proteins harbored LPLAT domains. qRT-PCR analysis showed that ZmDGAT genes exhibited very high relative expression in developing seeds, especially at the early stage of seed development. Under various abiotic stress conditions, differential responses of ZmDGAT genes were observed. An overall significant induction of ZmDGAT genes under cold stress in leaves and a quick and strong response to osmotic stresses in roots were highlighted. This study provides useful information for understanding the roles of DGATs in oil accumulation and stress responses in higher plants.
Collapse
Affiliation(s)
- Bowei Yan
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China.,b Institute for Comprehensive Utilization of Agricultural and Animal Husbandry, Heilongjiang Academy of Land Reclamation sciences, Harbin, 150000, Heilongjiang, China
| | - Xiaoxuan Xu
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Yingnan Gu
- c Remote Sensing Technology Center, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, Heilongjiang, China
| | - Ying Zhao
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Xunchao Zhao
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Lin He
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Changjiang Zhao
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Zuotong Li
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| | - Jingyu Xu
- a Key Lab of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province, College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China
| |
Collapse
|