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Daniela Rios Ramirez K, Botero Ñañez K, Leonardo Gonzalez Gomez C, Thiago Andrade Moreira Í. Efficient PAHs Removal and CO 2 Fixation by marine microalgae in wastewater using an airlift photobioreactor for biofuel production. ENVIRONMENTAL RESEARCH 2024:119672. [PMID: 39053760 DOI: 10.1016/j.envres.2024.119672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 06/05/2024] [Accepted: 07/22/2024] [Indexed: 07/27/2024]
Abstract
Microalgae cultures have emerged as a promising strategy in diverse areas, ranging from wastewater treatment to biofuel production, thus contributing to the search for carbon neutrality. These photosynthetic organisms can utilize the resources present in wastewater and fix atmospheric CO2 to produce biomass with high energy potential. In this study, the removal efficiency of Polycyclic Aromatic Hydrocarbons (PAHs), CO2 fixation and lipid content in the biomass produced from microalgae grown in airlift photobioreactor were evaluated. Four mesoscale cultures were carried out: Control (Seawater + Conway medium), Treatment A (Oil Produced Water + Poultry Effluent Water), Treatment B (Poultry Effluent Water + Seawater) and Treatment C (Oil Produced Water, Seawater and nutrients). The impact of biostimulation, through the addition of nutrients, on PAHs removal efficiency (up to 90%), CO2 fixation rate (up to 0.20 g L-1 d-1) and the composition of the generated biomass was observed. Primarily, the addition of nitrates to the culture medium impacted CO2 fixation rate of the microalgae. In addition, a direct correlation was observed between PAHs removal and lipid accumulation in the biomass, up to 36% in dry weight, demonstrating microalgae's ability to take advantage of the organic carbon (PAHs) present in the culture medium to generate lipid-rich biomass. The concentration of polysaccharides in the biomass obtained did not exceed 12% on a dry weight basis, and the Higher Heating Value (HHV) ranged between 17 and 21 MJ kg-1. Finally, the potential of generating hydrogen through pyrolysis was highlighted, taking advantage of the characteristics of biomass as a conversion route to produce biofuels. These results show that microalgae are effective in wastewater treatment and have great potential in producing biofuels, thus contributing to the transition towards more sustainable energy sources and climate change mitigation.
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Affiliation(s)
- Karen Daniela Rios Ramirez
- Institute of Geoscience, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Campus Ondina, 40170-115 Salvador, Bahia, Brazil
| | - Katerine Botero Ñañez
- Institute of Geoscience, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Campus Ondina, 40170-115 Salvador, Bahia, Brazil
| | - Cristian Leonardo Gonzalez Gomez
- Institute of Geoscience, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Campus Ondina, 40170-115 Salvador, Bahia, Brazil
| | - Ícaro Thiago Andrade Moreira
- Institute of Geoscience, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Campus Ondina, 40170-115 Salvador, Bahia, Brazil.
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Liu G, Li K, Yuan H, Zhou R, Mao L, Zhang R, Zhang G. An antifouling epoxy coated metal surface containing silica-immobilized carbonic anhydrase supraparticles for CO 2 capture through microalgae. Int J Biol Macromol 2024; 269:132075. [PMID: 38705317 DOI: 10.1016/j.ijbiomac.2024.132075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/21/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
Carbonic anhydrase (CA) has a promising application as a green and efficient biocatalyst for CO2 capture, and many successful cases of immobilizing CA have been reported. However, CA antifouling coatings on metal for CO2 sequestration have rarely been reported. Herein, dimeric CA from Sulfurihydrogenibium azorense (SazCA) with a ferritin tag, which was prepared by low-speed centrifugation with high yield, was adopted as a free enzyme and encapsulated in the sol-gel silica. The silica-immobilized CAs were dispersed into the commercialized metal-antifouling epoxy resin paint to obtain CA coated nickel foams, which had excellent stability, with 90 % and 67 % residual activity after 28 days of incubation at 30 °C and 60 °C, respectively. The CA coated nickel foams remained 60 % original activity after 6 cycles of use within 28 days. Then, a CA-microalgae carbon capture device was constructed using the CA coated nickel foams and Chlorella. The growth rate of Chlorella was significantly increased and the biomass of Chlorella increased by 29 % compared with control after 7 days of incubation. Due to the simple and cost-effective preparation process, sustainable and efficient CO2 absorption, this easy-to-scale up CA coated nickel foam has great potential in CA assisted microalgae-based CO2 capture and carbon neutrality.
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Affiliation(s)
- Guanzhang Liu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian Province, PR China
| | - Ke Li
- Shanghai Marine Diesel Engine Research Institute, Shanghai, 200090, PR China
| | - Hang Yuan
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian Province, PR China
| | - Rui Zhou
- Shanghai Marine Diesel Engine Research Institute, Shanghai, 200090, PR China
| | - Lei Mao
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian Province, PR China
| | - Ruifang Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian Province, PR China
| | - Guangya Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian Province, PR China.
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Shin SE, Koh HG, Park K, Park SH, Chang YK, Kang NK. Increasing lipid production in Chlamydomonas reinhardtii through genetic introduction for the overexpression of glyceraldehyde-3-phosphate dehydrogenase. Front Bioeng Biotechnol 2024; 12:1396127. [PMID: 38707501 PMCID: PMC11066295 DOI: 10.3389/fbioe.2024.1396127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/05/2024] [Indexed: 05/07/2024] Open
Abstract
Microalgae, valued for their sustainability and CO2 fixation capabilities, are emerging as promising sources of biofuels and high-value compounds. This study aimed to boost lipid production in C. reinhardtii by overexpressing chloroplast glyceraldehyde-3-phosphate dehydrogenase (GAPDH), a key enzyme in the Calvin cycle and glycolysis, under the control of a nitrogen-inducible NIT1 promoter, to positively impact overall carbon metabolism. The standout transformant, PNG#7, exhibited significantly increased lipid production under nitrogen starvation, with biomass rising by 44% and 76% on days 4 and 16, respectively. Fatty acid methyl ester (FAME) content in PNG#7 surged by 2.4-fold and 2.1-fold, notably surpassing the wild type (WT) in lipid productivity by 3.4 and 3.7 times on days 4 and 16, respectively. Transcriptome analysis revealed a tenfold increase in transgenic GAPDH expression and significant upregulation of genes involved in fatty acid and triacylglycerol synthesis, especially the gene encoding acyl-carrier protein gene (ACP, Cre13. g577100. t1.2). In contrast, genes related to cellulose synthesis were downregulated. Single Nucleotide Polymorphism (SNP)/Indel analysis indicated substantial DNA modifications, which likely contributed to the observed extensive transcriptomic and phenotypic changes. These findings suggest that overexpressing chloroplast GAPDH, coupled with genetic modifications, effectively enhances lipid synthesis in C. reinhardtii. This study not only underscores the potential of chloroplast GAPDH overexpression in microalgal lipid synthesis but also highlights the expansive potential of metabolic engineering in microalgae for biofuel production.
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Affiliation(s)
- Sung-Eun Shin
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Hyun Gi Koh
- Department of Biological and Chemical Engineering, Hongik University, Sejong, Republic of Korea
| | - Kyungmoon Park
- Department of Biological and Chemical Engineering, Hongik University, Sejong, Republic of Korea
| | - See-Hyoung Park
- Department of Biological and Chemical Engineering, Hongik University, Sejong, Republic of Korea
| | - Yong Keun Chang
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Nam Kyu Kang
- Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin, Republic of Korea
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Grira S, Alkhedher M, Abu Khalifeh H, Ramadan M, Ghazal M. Using algae in Li-ion batteries: A sustainable pathway toward greener energy storage. BIORESOURCE TECHNOLOGY 2024; 394:130225. [PMID: 38122999 DOI: 10.1016/j.biortech.2023.130225] [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: 10/14/2023] [Revised: 12/11/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
This paper reviews and analyzes the innovations and advances in using algae and their derivatives in different parts of Li-ion batteries. Applications in Li-ion battery anodes, electrolytes, binders, and separators were discussed. Algae provides a sustainable feedstock for different materials that can be used in Li-ion batteries, such as carbonaceous material, biosilica, biopolymers, and other materials that have unique micro- and nano-structures that act as biotemplates for composites structure design. Natural materials and biotemplates provided by algae have various advantages, such as electrochemical and thermal stability, porosity that allows higher storage capacity, nontoxicity, and other properties discussed in the paper. Results reveal that despite algae and its derivatives being a promising renewable feedstock for different applications in Li-ion batteries, more research is yet to be performed to evaluate its feasibility of being used in the industry.
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Affiliation(s)
- Soumaya Grira
- Chemical Engineering Department, Abu Dhabi University, 59911 Abu Dhabi, United Arab Emirates
| | - Mohammad Alkhedher
- Mechanical and Industrial Engineering Department, Abu Dhabi University, 59911 Abu Dhabi, United Arab Emirates
| | - Hadil Abu Khalifeh
- Chemical Engineering Department, Abu Dhabi University, 59911 Abu Dhabi, United Arab Emirates
| | - Mohamad Ramadan
- Lebanese International University, PO Box 146404 Beirut, Lebanon; International University of Beirut, PO Box 146404 Beirut, Lebanon; Univ Angers, LARIS, SFR MATHSTIC, F-49000 Angers, France.
| | - Mohammed Ghazal
- Electrical, Computer and Biomedical Engineering Department, Abu Dhabi University, 59911 Abu Dhabi, United Arab Emirates
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Ghosh G, Bhimrao Daile S, Chakraborty S, Atta A. Influence of super-optimal light intensity on the acetic acid uptake and microalgal growth in mixotrophic culture of Chlorella sorokiniana in bubble-column photobioreactors. BIORESOURCE TECHNOLOGY 2024; 393:130152. [PMID: 38049018 DOI: 10.1016/j.biortech.2023.130152] [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: 12/01/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
This study seeks to determine the influence of super-optimal light intensity on acetic acid uptake and its associated impact on the cellular composition of Chlorella sorokiniana in a semi-batch mixotrophic cultivation setup. Unicellular green microalga Chlorella sorokiniana is grown in a 1L bubble-column photobioreactor at light intensities from 6000 to 14,000 lx (≈81 to 189 µmol.photons.m-2.s-1). We find that microalgal acetic acid utilization reduces as illumination increases from an optimal 10,000 lx (≈135 µmol.photons.m-2.s-1) to a super-optimal zone (>10000 lx). This lowers microalgal growth (2.75 g/L) and acetic acid intake, which peak at 6 mL/L (10000 lx) and drop to 2 and 1 mL/L at 12,000 and 14,000 lx, respectively. Concurrently, the maximum lipid yield decreases from 0.66 g/L (10000 lx) to 0.54 g/L (12000 lx) and 0.42 g/L (14000 lx). Hence, super-optimal illumination not only disturbs phototrophy but also affects the heterotrophic component, creating an imbalance between the two.
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Affiliation(s)
- Gourab Ghosh
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Sushrunsha Bhimrao Daile
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Saikat Chakraborty
- Biological Systems Engineering, Plaksha University, Mohali, Punjab 140306, India
| | - Arnab Atta
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
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