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Phyu K, Zhi S, Liang J, Chang CC, Liu J, Cao Y, Wang H, Zhang K. Microalgal-bacterial consortia for the treatment of livestock wastewater: Removal of pollutants, interaction mechanisms, influencing factors, and prospects for application. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123864. [PMID: 38554837 DOI: 10.1016/j.envpol.2024.123864] [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: 01/25/2024] [Revised: 03/06/2024] [Accepted: 03/23/2024] [Indexed: 04/02/2024]
Abstract
The livestock sector is responsible for a significant amount of wastewater globally. The microalgal-bacterial consortium (MBC) treatment has gained increasing attention as it is able to eliminate pollutants to yield value-added microalgal products. This review offers a critical discussion of the source of pollutants from livestock wastewater and the environmental impact of these pollutants. It also discusses the interactions between microalgae and bacteria in treatment systems and natural habitats in detail. The effects on MBC on the removal of various pollutants (conventional and emerging) are highlighted, focusing specifically on analysis of the removal mechanisms. Notably, the various influencing factors are classified into internal, external, and operating factors, and the mutual feedback relationships between them and the target (removal efficiency and biomass) have been thoroughly analysed. Finally, a wastewater recycling treatment model based on MBC is proposed for the construction of a green livestock farm, and the application value of various microalgal products has been analysed. The overall aim was to indicate that the use of MBC can provide cost-effective and eco-friendly approaches for the treatment of livestock wastewater, thereby advancing the path toward a promising microalgal-bacterial-based technology.
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Affiliation(s)
- KhinKhin Phyu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China.
| | - Suli Zhi
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China; Key Laboratory of Low-Carbon Green Agriculture, North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China.
| | - Junfeng Liang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China; Key Laboratory of Low-Carbon Green Agriculture, North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China.
| | - Chein-Chi Chang
- Washington D.C. Water and Sewer Authority, Ellicott City, MD, 21042, USA.
| | - Jiahua Liu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China.
| | - Yuang Cao
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China.
| | - Han Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China.
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, PR China; Key Laboratory of Low-Carbon Green Agriculture, North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China.
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2
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Kang Y, Xu L, Dong J, Yuan X, Ye J, Fan Y, Liu B, Xie J, Ji X. Programmed microalgae-gel promotes chronic wound healing in diabetes. Nat Commun 2024; 15:1042. [PMID: 38310127 PMCID: PMC10838327 DOI: 10.1038/s41467-024-45101-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 01/16/2024] [Indexed: 02/05/2024] Open
Abstract
Chronic diabetic wounds are at lifelong risk of developing diabetic foot ulcers owing to severe hypoxia, excessive reactive oxygen species (ROS), a complex inflammatory microenvironment, and the potential for bacterial infection. Here we develop a programmed treatment strategy employing live Haematococcus (HEA). By modulating light intensity, HEA can be programmed to perform a variety of functions, such as antibacterial activity, oxygen supply, ROS scavenging, and immune regulation, suggesting its potential for use in programmed therapy. Under high light intensity (658 nm, 0.5 W/cm2), green HEA (GHEA) with efficient photothermal conversion mediate wound surface disinfection. By decreasing the light intensity (658 nm, 0.1 W/cm2), the photosynthetic system of GHEA can continuously produce oxygen, effectively resolving the problems of hypoxia and promoting vascular regeneration. Continuous light irradiation induces astaxanthin (AST) accumulation in HEA cells, resulting in a gradual transformation from a green to red hue (RHEA). RHEA effectively scavenges excess ROS, enhances the expression of intracellular antioxidant enzymes, and directs polarization to M2 macrophages by secreting AST vesicles via exosomes. The living HEA hydrogel can sterilize and enhance cell proliferation and migration and promote neoangiogenesis, which could improve infected diabetic wound healing in female mice.
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Affiliation(s)
- Yong Kang
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Lingling Xu
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Jinrui Dong
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Xue Yuan
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Jiamin Ye
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Yueyue Fan
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China
| | - Bing Liu
- Department of Disease Control and Prevention, Rocket Force Characteristic Medical Center, Beijing, 10088, China.
| | - Julin Xie
- Department of Burns, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Xiaoyuan Ji
- Academy of Medical Engineering and Translational Medicine, Medical College, Tianjin University, Tianjin, 300072, China.
- Medical College, Linyi University, Linyi, 276000, China.
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3
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Molina-Aulestia DT, de Carvalho JC, de Melo Pereira GV, da Silva Vale A, de Carvalho DP, Soccol VT, Soccol CR. Fine resolution analysis of bacterial communities associated with Neochloris oleoabundans culture and insights into terpenes as contamination control agents. World J Microbiol Biotechnol 2023; 39:192. [PMID: 37166608 DOI: 10.1007/s11274-023-03641-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
Biological contamination is one of the main bottlenecks in microalgae production, reducing quality and productivity and sometimes leading to the complete loss of the cultures. Selecting terpenes can be a pathway toward eco-friendly contamination control in microalgae cultures. This work evaluated the presence of bacterial contaminants in N. oleoabundans cultures through HTS and 16 S analysis and their susceptibility to six natural terpenes (α-pinene, β-pinene, limonene, trans-cinnamaldehyde, linalool, and eugenol). The principal phyla identified were Proteobacteria, Bacteroidetes, and Actinobacteria, and based on these data, 89 bacterial isolates of seven genera were obtained (36 Aureimonas sp., 27 Microbacterium sp., 5 Pseudomonas sp., 9 Bacillus sp., 14 Shinella sp., 1 Brevundimonas sp., and 1 Exiguobacterium sp.) at 25ºC in the presence of light. It was possible to observe that Beta-pinene 50 mg L- 1 only inhibited Bacillus sp. In contrast, Alpha-pinene, Linalool, and Trans-cinnamaldehyde, at a concentration of 6.25 mg L- 1 efficiently inhibited most isolates. The inhibition percentages found were 79-99%.
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Affiliation(s)
| | - Júlio César de Carvalho
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná Curitiba, Curitiba, 81531-980, PR, Brazil.
| | | | - Alexander da Silva Vale
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná Curitiba, Curitiba, 81531-980, PR, Brazil
| | - Dão Pedro de Carvalho
- Federal Institute of Education, Science and Technology of Paraná (IFPR), Londrina, PR, Brazil
| | - Vanete Thomaz Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná Curitiba, Curitiba, 81531-980, PR, Brazil
| | - Carlos Ricardo Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná Curitiba, Curitiba, 81531-980, PR, Brazil
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Pushpakumara BLDU, Tandon K, Willis A, Verbruggen H. Unravelling microalgal-bacterial interactions in aquatic ecosystems through 16S rRNA gene-based co-occurrence networks. Sci Rep 2023; 13:2743. [PMID: 36797257 PMCID: PMC9935533 DOI: 10.1038/s41598-023-27816-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/09/2023] [Indexed: 02/18/2023] Open
Abstract
Interactions between microalgae and bacteria can directly influence the global biogeochemical cycles but the majority of such interactions remain unknown. 16S rRNA gene-based co-occurrence networks have potential to help identify microalgal-bacterial interactions. Here, we used data from 10 Earth microbiome projects to identify potential microalgal-bacterial associations in aquatic ecosystems. A high degree of clustering was observed in microalgal-bacterial modules, indicating densely connected neighbourhoods. Proteobacteria and Bacteroidetes predominantly co-occurred with microalgae and represented hubs of most modules. Our results also indicated that species-specificity may be a global characteristic of microalgal associated microbiomes. Several previously known associations were recovered from our network modules, validating that biologically meaningful results can be inferred using this approach. A range of previously unknown associations were recognised such as co-occurrences of Bacillariophyta with uncultured Planctomycetes OM190 and Deltaproteobacteria order NB1-j. Planctomycetes and Verrucomicrobia were identified as key associates of microalgae due to their frequent co-occurrences with several microalgal taxa. Despite no clear taxonomic pattern, bacterial associates appeared functionally similar across different environments. To summarise, we demonstrated the potential of 16S rRNA gene-based co-occurrence networks as a hypothesis-generating framework to guide more focused research on microalgal-bacterial associations.
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Affiliation(s)
| | - Kshitij Tandon
- School of Biosciences, University of Melbourne, Melbourne, VIC, Australia
| | - Anusuya Willis
- Australian National Algae Culture Collection, CSIRO, Hobart, TAS, 7000, Australia
| | - Heroen Verbruggen
- School of Biosciences, University of Melbourne, Melbourne, VIC, Australia.
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Synergy between microalgae and microbiome in polluted waters. Trends Microbiol 2023; 31:9-21. [PMID: 35985939 DOI: 10.1016/j.tim.2022.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 11/22/2022]
Abstract
Microalga-microbiome interactions are central to both health and disease of aquatic environments. Despite impressive advances in deciphering how microorganisms participate in and impact aquatic ecosystems, the evolution and ecological involvement of microalgae and the microbiome in polluted waters are typically studied independently. Here, the phycosphere (i.e., the consortia of microalgae and the related microbiome) is regarded as an independent and integrated life form, and we summarize the survival strategies exhibited by this symbiont when exposed to anthropogenic pollution. We highlight the cellular strategies and discuss the modulation at the transcriptional and population levels, which reciprocally alters community structure or genome composition for medium-term acclimation or long-term adaptation. We propose a 'PollutantBiome' concept to help the understanding of microalga-microbiome interactions and development of beneficial microbial synthetic communities for pollutant remediation.
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Corcoran AA, Ohan J, Hanschen ER, Granite A, Martinez H, Holguin F, Hovde BT, Starkenburg SR. Scale-dependent enhancement of productivity and stability in xenic Nannochloropsis cultures. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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Astafyeva Y, Gurschke M, Qi M, Bergmann L, Indenbirken D, de Grahl I, Katzowitsch E, Reumann S, Hanelt D, Alawi M, Streit WR, Krohn I. Microalgae and Bacteria Interaction-Evidence for Division of Diligence in the Alga Microbiota. Microbiol Spectr 2022; 10:e0063322. [PMID: 35913168 PMCID: PMC9430724 DOI: 10.1128/spectrum.00633-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 07/07/2022] [Indexed: 11/20/2022] Open
Abstract
Microalgae are one of the most dominant forms of life on earth that is tightly associated with a distinct and specialized microbiota. We have previously shown that the microbiota of Scenedesmus quadricauda harbors less than 10 distinct microbial species. Here, we provide evidence that dominant species are affiliated with the genera of Variovorax, Porphyrobacter, and Dyadobacter. Experimental and transcriptome-based evidence implies that within this multispecies interaction, Dyadobacter is a key to alga growth and fitness and is highly adapted to live in the phycosphere. While presumably under light conditions the alga provides the energy source to the bacteria, Dyadobacter produces and releases mainly a large variety of polysaccharides modifying enzymes. This is coherent with high-level expression of the T9SS in alga cocultures. The transcriptome data further imply that quorum-quenching proteins (QQ) and biosynthesis of vitamins B1, B2, B5, B6, and B9 are expressed by Dyadobacter at high levels in comparison to Variovorax and Porphyrobacter. Notably, Dyadobacter produces a significant number of leucine-rich repeat (LRR) proteins and enzymes involved in bacterial reactive oxygen species (ROS) tolerance. Complementary to this, Variovorax expresses the genes of the biosynthesis of vitamins B2, B5, B6, B7, B9, and B12, and Porphyrobacter is specialized in the production of vitamins B2 and B6. Thus, the shared currency between partners are vitamins, microalgae growth-promoting substances, and dissolved carbon. This work significantly enlarges our knowledge on alga-bacteria interaction and demonstrates physiological investigations of microalgae and associated bacteria, using microscopy observations, photosynthetic activity measurements, and flow cytometry. IMPORTANCE The current study gives a detailed insight into mutualistic collaboration of microalgae and bacteria, including the involvement of competitive interplay between bacteria. We provide experimental evidence that Gram-negative bacteria belonging to the Dyadobacter, Porphyrobacter, and Variovorax are the key players in a Scenedesmus quadricauda alga-bacteria interaction. We impart strong evidence that Dyadobacter produces and releases polysaccharides degradation enzymes and leucine-rich repeat proteins; Variovorax supplies the consortium with auxins and vitamin B12, while Porphyrobacter produces a broad spectrum of B vitamins. We show not only that the microalgae collaborate with the bacteria and vice versa but also that the bacteria interact with each other via quorum-sensing and secretion system mechanisms. The shared currency between partners appears to be vitamins, microalgae growth-promoting substances, and dissolved carbon.
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Affiliation(s)
- Yekaterina Astafyeva
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
| | - Marno Gurschke
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
| | - Minyue Qi
- University Medical Center Hamburg-Eppendorf, Bioinformatics Core, Hamburg, Germany
| | - Lutgardis Bergmann
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
| | - Daniela Indenbirken
- Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, Virus Genomics, Hamburg, Germany
| | - Imke de Grahl
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Plant Biochemistry and Infection Biology, Hamburg, Germany
| | - Elena Katzowitsch
- University of Würzburg, Core Unit Systems Medicine, Würzburg, Germany
| | - Sigrun Reumann
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Plant Biochemistry and Infection Biology, Hamburg, Germany
| | - Dieter Hanelt
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Aquatic Ecophysiology and Phycology, Hamburg, Germany
| | - Malik Alawi
- University Medical Center Hamburg-Eppendorf, Bioinformatics Core, Hamburg, Germany
| | - Wolfgang R. Streit
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
| | - Ines Krohn
- University of Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
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Desjardins SM, Laamanen CA, Basiliko N, Senhorinho GNA, Scott JA. Dark stress for improved lipid quantity and quality in bioprospected acid-tolerant green microalgae. FEMS Microbiol Lett 2022; 369:6615457. [PMID: 35746875 DOI: 10.1093/femsle/fnac057] [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: 11/03/2021] [Revised: 05/26/2022] [Accepted: 06/18/2022] [Indexed: 11/14/2022] Open
Abstract
The cost of microalgae cultivation is one of the largest limitations to achieving sustainable, large-scale microalgae production of commercially desirable lipids. Utilizing CO2 as a 'free' carbon source from waste industrial flue gas emissions can offer wide-ranging cost savings. However, these gas streams typically create acidic environments, in which most microalgae cannot survive due to the concentration of CO2 and the presence of other acidic gasses such as NO2 and SO2. To address this situation, we investigated growth of a mixed acid-tolerant green microalgal culture (91% dominated by a single Coccomyxa sp. taxon) bioprospected at pH 2.8 from an acid mine drainage impacted water body. The culture was grown at pH 2.5 and fed with a simulated flue gas containing 6% CO2 and 94% N2. On reaching the end of the exponential growth phase, the culture was exposed to either continued light-dark cycle conditions or continual dark conditions. After three days in the dark, the biomass consisted of 28% of lipids, which was 42% higher than at the end of the exponential phase and 55% higher than the maximum lipid content achieved under light/dark conditions. The stress caused by being continually in the dark also favoured the production of omega-3 and omega-6 polyunsaturated fatty acids (PUFAs; 19.47% and 21.04%, respectively, after 7 days) compared to 7-days of light-dark treatment (1.94% and 9.53%, respectively) and showed an increase in nitrogen content (C:N ratio of 6.4) compared to light-dark treatment (C:N ratio of 11.9). The results of the research indicate that use of acid tolerant microalgae overcomes issues using flue gasses that will create an acidic environment and that applying dark stress is a low-cost stressor stimulates production of desirable dietary lipids.
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Affiliation(s)
- Sabrina M Desjardins
- School of Engineering, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada
| | - Corey A Laamanen
- School of Engineering, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada
| | - Nathan Basiliko
- Department of Biology, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada
| | - Gerusa N A Senhorinho
- School of Engineering, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada
| | - John A Scott
- School of Engineering, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada
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Lab-scale photobioreactor systems: principles, applications, and scalability. Bioprocess Biosyst Eng 2022; 45:791-813. [PMID: 35303143 PMCID: PMC9033726 DOI: 10.1007/s00449-022-02711-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/14/2022] [Indexed: 12/20/2022]
Abstract
Phototrophic microorganisms that convert carbon dioxide are being explored for their capacity to solve different environmental issues and produce bioactive compounds for human therapeutics and as food additives. Full-scale phototrophic cultivation of microalgae and cyanobacteria can be done in open ponds or closed photobioreactor systems, which have a broad range of volumes. This review focuses on laboratory-scale photobioreactors and their different designs. Illuminated microtiter plates and microfluidic devices offer an option for automated high-throughput studies with microalgae. Illuminated shake flasks are used for simple uncontrolled batch studies. The application of illuminated bubble column reactors strongly emphasizes homogenous gas distribution, while illuminated flat plate bioreactors offer high and uniform light input. Illuminated stirred-tank bioreactors facilitate the application of very well-defined reaction conditions. Closed tubular photobioreactors as well as open photobioreactors like small-scale raceway ponds and thin-layer cascades are applied as scale-down models of the respective large-scale bioreactors. A few other less common designs such as illuminated plastic bags or aquarium tanks are also used mainly because of their relatively low cost, but up-scaling of these designs is challenging with additional light-driven issues. Finally, this review covers recommendations on the criteria for photobioreactor selection and operation while up-scaling of phototrophic bioprocesses with microalgae or cyanobacteria.
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10
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Characterization of two microalgae consortia grown in industrial wastewater for biomass valorization. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Lian J, Steinert G, de Vree J, Meijer S, Heryanto C, Bosma R, Wijffels RH, Barbosa MJ, Smidt H, Sipkema D. Bacterial diversity in different outdoor pilot plant photobioreactor types during production of the microalga Nannochloropsis sp. CCAP211/78. Appl Microbiol Biotechnol 2022; 106:2235-2248. [PMID: 35166894 PMCID: PMC8930801 DOI: 10.1007/s00253-022-11815-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 12/22/2021] [Accepted: 01/29/2022] [Indexed: 11/25/2022]
Abstract
As large-scale outdoor production cannot be done in complete containment, cultures are (more) open for bacteria, which may affect the productivity and stability of the algae production process. We investigated the bacterial diversity in two indoor reactors and four pilot-scale outdoor reactors for the production of Nannochloropsis sp. CCAP211/78 spanning four months of operation from July to October. Illumina sequencing of 16S rRNA gene amplicons demonstrated that a wide variety of bacteria were present in all reactor types, with predominance of Bacteroidetes and Alphaproteobacteria. Bacterial communities were significantly different between all reactor types (except between the horizontal tubular reactor and the vertical tubular reactor) and also between runs in each reactor. Bacteria common to the majority of samples included one member of the Saprospiraceae family and one of the NS11-12_marine group (both Bacteroidetes). Hierarchical clustering analysis revealed two phases during the cultivation period separated by a major shift in bacterial community composition in the horizontal tubular reactor, the vertical tubular reactor and the raceway pond with a strong decrease of the Saprospiraceae and NS11-12_marine group that initially dominated the bacterial communities. Furthermore, we observed a less consistent pattern of bacterial taxa appearing in different reactors and runs, most of which belonging to the classes Deltaproteobacteria and Flavobacteriia. In addition, canonical correspondence analysis showed that the bacterial community composition was significantly correlated with the nitrate concentration. This study contributes to our understanding of bacterial diversity and composition in different types of outdoor reactors exposed to a range of dynamic biotic and abiotic factors. Key points • Reactor types had significantly different bacterial communities except HT and VT • The inoculum source and physiochemical factors together affect bacterial community • The bacterial family Saprospiraceae is positively correlated to microalgal growth.
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Affiliation(s)
- Jie Lian
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Georg Steinert
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Jeroen de Vree
- Bioprocess Engineering, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Sven Meijer
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Christa Heryanto
- Bioprocess Engineering, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Rouke Bosma
- Bioprocess Engineering, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - René H Wijffels
- Bioprocess Engineering, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
- Faculty of Biosciences and Aquaculture, Nord University, N8049, Bodø, Norway
| | - Maria J Barbosa
- Bioprocess Engineering, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Detmer Sipkema
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands.
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Lian J, Schimmel P, Sanchez‐Garcia S, Wijffels RH, Smidt H, Sipkema D. Different co-occurring bacteria enhance or decrease the growth of the microalga Nannochloropsis sp. CCAP211/78. Microb Biotechnol 2021; 14:1159-1170. [PMID: 33683803 PMCID: PMC8085966 DOI: 10.1111/1751-7915.13784] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 02/12/2021] [Accepted: 02/15/2021] [Indexed: 11/29/2022] Open
Abstract
Marine photosynthetic microalgae are ubiquitously associated with bacteria in nature. However, the influence of these bacteria on algal cultures in bioreactors is still largely unknown. In this study, eighteen different bacterial strains were isolated from cultures of Nannochloropsis sp. CCAP211/78 in two outdoor pilot-scale tubular photobioreactors. The majority of isolates was affiliated with the classes Alphaproteobacteria and Flavobacteriia. To assess the impact of the eighteen strains on the growth of Nannochloropsis sp. CCAP211/78, 24-well plates coupled with custom-made LED boxes were used to simultaneously compare replicate axenic microalgal cultures with addition of individual bacterial isolates. Co-culturing of Nannochloropsis sp. CCAP211/78 with these strains demonstrated distinct responses, which shows that the technique we developed is an efficient method for screening the influence of harmful/beneficial bacteria. Two of the tested strains, namely a strain of Maritalea porphyrae (DMSP31) and a Labrenzia aggregata strain (YP26), significantly enhanced microalgal growth with a 14% and 12% increase of the chlorophyll concentration, respectively, whereas flavobacterial strain YP206 greatly inhibited the growth of the microalga with 28% reduction of the chlorophyll concentration. Our study suggests that algal production systems represent a 'natural' source to isolate and study microorganisms that can either benefit or harm algal cultures.
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Affiliation(s)
- Jie Lian
- Laboratory of MicrobiologyWageningen University & ResearchStippeneng 4Wageningen6708 WEThe Netherlands
| | - Patrick Schimmel
- Laboratory of MicrobiologyWageningen University & ResearchStippeneng 4Wageningen6708 WEThe Netherlands
| | - Selene Sanchez‐Garcia
- Laboratory of MicrobiologyWageningen University & ResearchStippeneng 4Wageningen6708 WEThe Netherlands
| | - Rene H. Wijffels
- Bioprocess Engineering Group, AlgaePARCWageningen University & ResearchPO Box 16Wageningen6700 AAThe Netherlands
- Faculty of Biosciences and AquacultureNord UniversityBodøN‐8049Norway
| | - Hauke Smidt
- Laboratory of MicrobiologyWageningen University & ResearchStippeneng 4Wageningen6708 WEThe Netherlands
| | - Detmer Sipkema
- Laboratory of MicrobiologyWageningen University & ResearchStippeneng 4Wageningen6708 WEThe Netherlands
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Mattsson L, Sörenson E, Capo E, Farnelid HM, Hirwa M, Olofsson M, Svensson F, Lindehoff E, Legrand C. Functional Diversity Facilitates Stability Under Environmental Changes in an Outdoor Microalgal Cultivation System. Front Bioeng Biotechnol 2021; 9:651895. [PMID: 33968914 PMCID: PMC8100445 DOI: 10.3389/fbioe.2021.651895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/23/2021] [Indexed: 01/22/2023] Open
Abstract
Functionally uniform monocultures have remained the paradigm in microalgal cultivation despite the apparent challenges to avoid invasions by other microorganisms. A mixed microbial consortium approach has the potential to optimize and maintain biomass production despite of seasonal changes and to be more resilient toward contaminations. Here we present a 3-year outdoor production of mixed consortia of locally adapted microalgae and bacteria in cold temperate latitude. Microalgal consortia were cultivated in flat panel photobioreactors using brackish Baltic Sea water and CO2 from a cement factory (Degerhamn, Cementa AB, Heidelberg Cement Group) as a sustainable CO2 source. To evaluate the ability of the microbial consortia to maintain stable biomass production while exposed to seasonal changes in both light and temperature, we tracked changes in the microbial community using molecular methods (16S and 18S rDNA amplicon sequencing) and monitored the biomass production and quality (lipid, protein, and carbohydrate content) over 3 years. Despite changes in environmental conditions, the mixed consortia maintained stable biomass production by alternating between two different predominant green microalgae (Monoraphidium and Mychonastes) with complementary tolerance to temperature. The bacterial population was few taxa co-occured over time and the composition did not have any connection to the shifts in microalgal taxa. We propose that a locally adapted and mixed microalgal consortia, with complementary traits, can be useful for optimizing yield of commercial scale microalgal cultivation.
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Affiliation(s)
- Lina Mattsson
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Eva Sörenson
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Eric Capo
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Hanna Maria Farnelid
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Maurice Hirwa
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden.,Axis Communications, Lund, Sweden
| | | | - Fredrik Svensson
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Elin Lindehoff
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Catherine Legrand
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
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Sörenson E, Capo E, Farnelid H, Lindehoff E, Legrand C. Temperature Stress Induces Shift From Co-Existence to Competition for Organic Carbon in Microalgae-Bacterial Photobioreactor Community - Enabling Continuous Production of Microalgal Biomass. Front Microbiol 2021; 12:607601. [PMID: 33643237 PMCID: PMC7905023 DOI: 10.3389/fmicb.2021.607601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 01/12/2021] [Indexed: 12/17/2022] Open
Abstract
To better predict the consequences of environmental change on aquatic microbial ecosystems it is important to understand what enables community resilience. The mechanisms by which a microbial community maintain its overall function, for example, the cycling of carbon, when exposed to a stressor, can be explored by considering three concepts: biotic interactions, functional adaptations, and community structure. Interactions between species are traditionally considered as, e.g., mutualistic, parasitic, or neutral but are here broadly defined as either coexistence or competition, while functions relate to their metabolism (e.g., autotrophy or heterotrophy) and roles in ecosystem functioning (e.g., oxygen production, organic matter degradation). The term structure here align with species richness and diversity, where a more diverse community is though to exhibit a broader functional capacity than a less diverse community. These concepts have here been combined with ecological theories commonly used in resilience studies, i.e., adaptive cycles, panarchy, and cross-scale resilience, that describe how the status and behavior at one trophic level impact that of surrounding levels. This allows us to explore the resilience of a marine microbial community, cultivated in an outdoor photobioreactor, when exposed to a naturally occurring seasonal stress. The culture was monitored for 6weeks during which it was exposed to two different temperature regimes (21 ± 2 and 11 ± 1°C). Samples were taken for metatranscriptomic analysis, in order to assess the regulation of carbon uptake and utilization, and for amplicon (18S and 16S rRNA gene) sequencing, to characterize the community structure of both autotrophs (dominated by the green microalgae Mychonastes) and heterotrophs (associated bacterioplankton). Differential gene expression analyses suggested that community function at warm temperatures was based on concomitant utilization of inorganic and organic carbon assigned to autotrophs and heterotrophs, while at colder temperatures, the uptake of organic carbon was performed primarily by autotrophs. Upon the shift from high to low temperature, community interactions shifted from coexistence to competition for organic carbon. Network analysis indicated that the community structure showed opposite trends for autotrophs and heterotrophs in having either high or low diversity. Despite an abrupt change of temperature, the microbial community as a whole responded in a way that maintained the overall level of diversity and function within and across autotrophic and heterotrophic levels. This is in line with cross-scale resilience theory describing how ecosystems may balance functional overlaps within and functional redundancy between levels in order to be resilient to environmental change (such as temperature).
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Affiliation(s)
- Eva Sörenson
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Eric Capo
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Hanna Farnelid
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Elin Lindehoff
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
| | - Catherine Legrand
- Department of Biology and Environmental Science, Centre of Ecology and Evolution and Microbial Model Systems, Linnaeus University, Kalmar, Sweden
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15
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Bioactivity of a Marine Diatom (Porosira glacialis [Grunow] Jörgensen 1905) Cultivated With and Without Factory Smoke CO2. Ind Biotechnol (New Rochelle N Y) 2021. [DOI: 10.1089/ind.2020.0031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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16
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Abstract
Worldwide demand for ethanol alternative fuel has been emerging day by day owing to the rapid population growth and industrialization. Culturing microalgae as an alternative feedstock is anticipated to be a potentially significant approach for sustainable bioethanol biofuel production. Microalgae are abundant in nature, which grow at faster rates with a capability of storing high lipid and starch/cellulose contents inside their cells. This process offers several environmental advantages, including the effective utilization of land, good CO2 sequestration without entering into "food against fuel" dispute. This chapter focuses on the methods and processes used for the production of bioethanol biofuels from algae. Thus, it also covers significant achievements in the research and developments on algae bioethanol production, mainly including pretreatment, hydrolysis, and fermentation of algae biomass. The processes of producing biodiesel, biogas, and hydrogen have also been discussed.
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Affiliation(s)
- Vineet Kumar Soni
- Sustainable Materials and Catalysis Research Laboratory (SMCRL), Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, India
| | - R Krishnapriya
- Sustainable Materials and Catalysis Research Laboratory (SMCRL), Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, India
| | - Rakesh Kumar Sharma
- Sustainable Materials and Catalysis Research Laboratory (SMCRL), Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, India.
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17
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A long-term pilot-scale algal cultivation on power plant flue gas – Cultivation stability and biomass accumulation. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102115] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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Heyse J, Props R, Kongnuan P, De Schryver P, Rombaut G, Defoirdt T, Boon N. Rearing water microbiomes in white leg shrimp (Litopenaeus vannamei) larviculture assemble stochastically and are influenced by the microbiomes of live feed products. Environ Microbiol 2020; 23:281-298. [PMID: 33169932 DOI: 10.1111/1462-2920.15310] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/21/2020] [Accepted: 11/06/2020] [Indexed: 01/22/2023]
Abstract
The development of effective management strategies to reduce the occurrence of diseases in aquaculture is hampered by the limited knowledge on the microbial ecology of these systems. In this study, the dynamics and dominant community assembly processes in the rearing water of Litopenaeus vannamei larviculture tanks were determined. Additionally, the contribution of peripheral microbiomes, such as those of live and dry feeds, to the rearing water microbiome were quantified. The community assembly in the hatchery rearing water over time was dominated by stochasticity, which explains the observed heterogeneity between replicate cultivations. The community undergoes two shifts that match with the dynamics of the algal abundances in the rearing water. Source tracking analysis revealed that 37% of all bacteria in the hatchery rearing water were introduced either by the live or dry feeds, or during water exchanges. The contribution of the microbiome from the algae was the largest, followed by that of the Artemia, the exchange water and the dry feeds. Our findings provide fundamental knowledge on the assembly processes and dynamics of rearing water microbiomes and illustrate the crucial role of these peripheral microbiomes in maintaining health-promoting rearing water microbiomes.
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Affiliation(s)
- Jasmine Heyse
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Ruben Props
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | | | | | - Geert Rombaut
- INVE Technologies NV, Hoogveld 93, Dendermonde, 9200, Belgium
| | - Tom Defoirdt
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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Liu B, Eltanahy EE, Liu H, Chua ET, Thomas-Hall SR, Wass TJ, Pan K, Schenk PM. Growth-promoting bacteria double eicosapentaenoic acid yield in microalgae. BIORESOURCE TECHNOLOGY 2020; 316:123916. [PMID: 32768998 DOI: 10.1016/j.biortech.2020.123916] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 05/26/2023]
Abstract
High-yielding microalgae present an important commodity to sustainably satisfy burgeoning food, feed and biofuel demands. Because algae-associated bacteria can significantly enhance or reduce yields, we isolated, identified and selected highly-effective "probiotic" bacterial strains associated with Nannochloropsis oceanica, a high-yielding microalga rich in eicosapentaenoic acid (EPA). Xenic algae growth was significantly enhanced by co-cultivation with ten isolated bacteria that improved culture density and biomass by 2.2- and 1.56-fold, respectively (1.39 × 108 cells mL-1; 0.82 g L-1). EPA contents increased up to 2.25-fold (to 39.68% of total fatty acids). Added probiotic bacteria possessed multiple growth-stimulating characteristics, including atmospheric nitrogen fixation, growth hormone production and phosphorous solubilization. Core N. oceanica-dominant bacterial microbiomes at different cultivation scales included Sphingobacteria, Flavobacteria (Bacteroidetes), and α, γ-Proteobacteria, and added probiotic bacteria could be maintained. We conclude that the supplementation with probiotic algae-associated bacteria can significantly enhance biomass and EPA production of N. oceanica.
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Affiliation(s)
- Bingli Liu
- Laboratory of Applied Microalgae Biology, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Eladl E Eltanahy
- Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia; Phycology Laboratory, Botany Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Hongwei Liu
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales 2751, Australia
| | - Elvis T Chua
- Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Skye R Thomas-Hall
- Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Taylor J Wass
- Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Kehou Pan
- Laboratory of Applied Microalgae Biology, Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Peer M Schenk
- Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.
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20
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Haberkorn I, Walser J, Helisch H, Böcker L, Belz S, Schuppler M, Fasoulas S, Mathys A. Characterization of Chlorella vulgaris (Trebouxiophyceae) associated microbial communities 1. JOURNAL OF PHYCOLOGY 2020; 56:1308-1322. [PMID: 32428976 PMCID: PMC7687158 DOI: 10.1111/jpy.13026] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
Microalgae exhibit extensive potential for counteracting imminent challenges in the nutraceutical, pharmaceutical, and biomaterial sectors, but lack economic viability. Biotechnological systems for contamination control could advance the economic viability of microalgal feedstock, but the selection of suitable strains that sustainably promote microalgal productivity remains challenging. In this study, total diversity in phototrophic Chlorella vulgaris cultures was assessed by amplicon sequencing comparing cultures subjected to five different cultivation conditions. Overall, 12 eukaryotic and 53 prokaryotic taxa were identified; Alphaproteobacteria (36.7%) dominated the prokaryotic and C. vulgaris (97.2%) the eukaryotic community. Despite altering cultivation conditions, 2 eukaryotic and 40 prokaryotic taxa remained stably associated with C. vulgaris; diversity between systems did not significantly differ (P > 0.05). Among those, 20 cultivable taxa were isolated and identified by 16S rDNA sequencing. Subsequently, controlled co-cultures were investigated showing stable associations of C. vulgaris with Sphingopyxis sp. and Pseudomonas sp.. Out-competition of C. vulgaris due to ammonium or phosphate limitation was not observed, despite significantly elevated growth of Sphingopyxis sp. and Tistrella sp.. (P < 0.05). Nevertheless, C. vulgaris growth was impaired by Tistrella sp.. Hence, the study provides a selection of stable indigenous prokaryotes and eukaryotes for artificially tailoring microbial biocenoses. Following a bottom-up approach, it provides a base for controlled co-cultures and thus the establishment of even more complex biocenoses using interkingdom assemblages. Such assemblages can benefit from functional richness for improved nutrient utilization, as well as bacterial load control, which can enhance microalgal feedstock production through improved culture stability and productivity.
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Affiliation(s)
- Iris Haberkorn
- Laboratory of Sustainable Food ProcessingInstitute of Food, Nutrition and HealthSwiss Federal Institute of Technology (ETH)Schmelzbergstrasse 98092ZürichSwitzerland
| | - Jean‐Claude Walser
- Genetic Diversity CentreSwiss Federal Institute of Technology (ETH)Universitätsstrasse 168092ZürichSwitzerland
| | - Harald Helisch
- Institute of Space System EngineeringUniversity of StuttgartPfaffenwaldring 2970569StuttgartGermany
| | - Lukas Böcker
- Laboratory of Sustainable Food ProcessingInstitute of Food, Nutrition and HealthSwiss Federal Institute of Technology (ETH)Schmelzbergstrasse 98092ZürichSwitzerland
| | - Stefan Belz
- Institute of Space System EngineeringUniversity of StuttgartPfaffenwaldring 2970569StuttgartGermany
| | - Markus Schuppler
- Laboratory of Food MicrobiologyInstitute of Food, Nutrition and HealthSwiss Federal Institute of Technology (ETH)Schmelzbergstrasse 78092ZürichSwitzerland
| | - Stefanos Fasoulas
- Institute of Space System EngineeringUniversity of StuttgartPfaffenwaldring 2970569StuttgartGermany
| | - Alexander Mathys
- Laboratory of Sustainable Food ProcessingInstitute of Food, Nutrition and HealthSwiss Federal Institute of Technology (ETH)Schmelzbergstrasse 98092ZürichSwitzerland
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21
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22
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Krug L, Erlacher A, Markut K, Berg G, Cernava T. The microbiome of alpine snow algae shows a specific inter-kingdom connectivity and algae-bacteria interactions with supportive capacities. ISME JOURNAL 2020; 14:2197-2210. [PMID: 32424246 PMCID: PMC7608445 DOI: 10.1038/s41396-020-0677-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 04/25/2020] [Accepted: 05/01/2020] [Indexed: 12/15/2022]
Abstract
Mutualistic interactions within microbial assemblages provide a survival strategy under extreme conditions; however, little is known about the complexity of interaction networks in multipartite, free-living communities. In the present study, the interplay within algae-dominated microbial communities exposed to harsh environmental influences in the Austrian Alps was assessed in order to reveal the interconnectivity of eukaryotic and prokaryotic inhabitants. All analyzed snowfields harbored distinct microbial communities. Network analyses revealed that mutual exclusion prevailed among microalgae in the alpine environment, while bacteria were mainly positively embedded in the interaction networks. Especially members of Proteobacteria, with a high prevalence of Oxalobacteraceae, Pseudomonadaceae, and Sphingomonadaceae showed genus-specific co-occurrences with distinct microalgae. Co-cultivation experiments with algal and bacterial isolates confirmed beneficial interactions that were predicted based on the bioinformatic analyses; they resulted in up to 2.6-fold more biomass for the industrially relevant microalga Chlorella vulgaris, and up to 4.6-fold increase in biomass for the cryophilic Chloromonas typhlos. Our findings support the initial hypothesis that microbial communities exposed to adverse environmental conditions in alpine systems harbor inter-kingdom supportive capacities. The insights into mutualistic inter-kingdom interactions and the ecology of microalgae within complex microbial communities provide explanations for the prevalence and resilience of such assemblages in alpine environments.
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Affiliation(s)
- Lisa Krug
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010, Graz, Austria.,ACIB GmbH, Petersgasse 14, 8010, Graz, Austria
| | - Armin Erlacher
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010, Graz, Austria
| | - Katharina Markut
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010, Graz, Austria
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010, Graz, Austria
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010, Graz, Austria.
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23
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Tromas N, Taranu ZE, Castelli M, Pimentel JSM, Pereira DA, Marcoz R, Shapiro BJ, Giani A. The evolution of realized niches within freshwater
Synechococcus. Environ Microbiol 2020; 22:1238-1250. [DOI: 10.1111/1462-2920.14930] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 01/21/2020] [Accepted: 01/24/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Nicolas Tromas
- Département de sciences biologiquesUniversité de Montréal Montréal QC H2V 2S9 Canada
| | - Zofia E. Taranu
- Environnement et Changement Climatique Canada 105 Rue McGill, Montréal QC H2Y 2E7 Canada
| | | | | | - Daniel A. Pereira
- Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Romane Marcoz
- Département de sciences biologiquesUniversité de Montréal Montréal QC H2V 2S9 Canada
| | - B. Jesse Shapiro
- Département de sciences biologiquesUniversité de Montréal Montréal QC H2V 2S9 Canada
| | - Alessandra Giani
- Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil
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24
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Yu J, Hu H, Wu X, Wang C, Zhou T, Liu Y, Ruan R, Zheng H. Continuous cultivation of Arthrospira platensis for phycocyanin production in large-scale outdoor raceway ponds using microfiltered culture medium. BIORESOURCE TECHNOLOGY 2019; 287:121420. [PMID: 31096101 DOI: 10.1016/j.biortech.2019.121420] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/01/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
In the present study, the effect of filtrating algal culture medium for reuse by using microfiltration membranes on microalgal growth, microbiological contamination, and phycocyanin production of Arthrospira platensis was investigated. Results showed that microfiltered culture medium affected microalgal growth, microbiological contamination, and phycocyanin production of A. platensis significantly. Microfiltered culture medium could enhance biomass production, photosynthesis, and phycocyanin accumulation and decrease microbiological contamination during continuous cultivation of A. platensis compared to the control. The profile of microbial communities, which contained the 10 phyla of microorganisms including bacteria and microzooplanktons, was identified for the first time for industrial algae systems of A. platensis with extreme conditions (salt-alkaline stress conditions). The application of the established strategy can enhance phycocyanin production of A. platensis while mitigating microbiological contamination.
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Affiliation(s)
- Jiajia Yu
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Hancui Hu
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Xiaodan Wu
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Congchun Wang
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Ting Zhou
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Yuhuan Liu
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Roger Ruan
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China; Center for Biorefining and Department of Bioproducts and Biosystems Engineering , University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, United States
| | - Hongli Zheng
- MOE Biomass Energy Research Center and College of Food Science and Technology and State Key Laboratory of Food Science and Technology, Nanchang University, 235 East Nanjing Road, Nanchang, Jiangxi 330047, People's Republic of China.
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25
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Giraldo JB, Stock W, Dow L, Roef L, Willems A, Mangelinckx S, Kroth PG, Vyverman W, Michiels M. Influence of the algal microbiome on biofouling during industrial cultivation of Nannochloropsis sp. in closed photobioreactors. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Fisher CL, Ward CS, Lane PD, Kimbrel JA, Sale KL, Stuart RK, Mayali X, Lane TW. Bacterial communities protect the alga Microchloropsis salina from grazing by the rotifer Brachionus plicatilis. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Economic feasibility and long-term sustainability criteria on the path to enable a transition from fossil fuels to biofuels. Curr Opin Biotechnol 2019; 57:175-182. [DOI: 10.1016/j.copbio.2019.04.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 03/31/2019] [Accepted: 04/16/2019] [Indexed: 12/19/2022]
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28
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Heterotrophic cultivation of T. obliquus under non-axenic conditions by uncoupled supply of nitrogen and glucose. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.02.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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29
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Seger M, Unc A, Starkenburg SR, Holguin FO, Lammers PJ. Nutrient-driven algal-bacterial dynamics in semi-continuous, pilot-scale photobioreactor cultivation of Nannochloropsis salina CCMP1776 with municipal wastewater nutrients. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101457] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Lian J, Wijffels RH, Smidt H, Sipkema D. The effect of the algal microbiome on industrial production of microalgae. Microb Biotechnol 2018; 11:806-818. [PMID: 29978601 PMCID: PMC6116740 DOI: 10.1111/1751-7915.13296] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/10/2018] [Accepted: 06/11/2018] [Indexed: 12/22/2022] Open
Abstract
Microbes are ubiquitously distributed, and they are also present in algae production systems. The algal microbiome is a pivotal part of the alga holobiont and has a key role in modulating algal populations in nature. However, there is a lack of knowledge on the role of bacteria in artificial systems ranging from laboratory flasks to industrial ponds. Coexisting microorganisms, and predominantly bacteria, are often regarded as contaminants in algal research, but recent studies manifested that many algal symbionts not only promote algal growth but also offer advantages in downstream processing. Because of the high expectations for microalgae in a bio‐based economy, better understanding of benefits and risks of algal–microbial associations is important for the algae industry. Reducing production cost may be through applying specific bacteria to enhance algae growth at large scale as well as through preventing the growth of a broad spectrum of algal pathogens. In this review, we highlight the latest studies of algae–microbial interactions and their underlying mechanisms, discuss advantages of large‐scale algal–bacterial cocultivation and extend such knowledge to a broad range of biotechnological applications.
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Affiliation(s)
- Jie Lian
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Rene H Wijffels
- Bioprocess Engineering Group, AlgaePARC, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands.,Faculty of Biosciences and Aquaculture, Nord University, N-8049, Bodø, Norway
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Detmer Sipkema
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
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Luo Y, Le-Clech P, Henderson RK. Assessment of membrane photobioreactor (MPBR) performance parameters and operating conditions. WATER RESEARCH 2018; 138:169-180. [PMID: 29597119 DOI: 10.1016/j.watres.2018.03.050] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/18/2018] [Accepted: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Membrane photobioreactor (MPBR) technology is an emerging algae-based wastewater treatment system. Given the limitations due to the general use of conventional analytical approaches in previous research, this study aims to provide a more comprehensive assessment of MPBR performance through advanced characterisation techniques. New performance parameters are also proposed, encompassing five important aspects of MPBR system efficiency (i.e. biomass concentration, composition, production, nutrient uptake and harvesting potential). Under initial standard operating conditions, performance parameters, such as cell count/MLSS ratio, cell viability, proportion of bacteria and biomass yield coefficient, were found to offer new insights into the operation of MPBR. These parameters were then used, for the first time, to systematically investigate MPBRs operated under different hydraulic retention times (HRTs) and solids retention times (SRTs). Applying shorter HRT and SRT was observed to increase cell viability and productivity (up to 0.25 × 107 cells/mL·d), as anticipated due to the higher nutrient loading. It was noted that the faster growing algal cells featured lower requirement for nutrients. On the other hand, extending HRT and SRT resulted in a more heterogeneous culture (lower cell count/MLSS ratio and higher proportion of bacteria), achieving a higher degree of autoflocculation and greater NO3-N and PO4-P removals of up to 79% and 78% respectively. The results demonstrate the trade-off between applying different HRTs and SRTs and the importance of fully characterising system performance to critically assess the advantages and limitations of chosen operating conditions.
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Affiliation(s)
- Yunlong Luo
- The BioMASS Lab, School of Chemical Engineering, UNSW Sydney, Australia; UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, UNSW Sydney, Australia
| | - Pierre Le-Clech
- UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, UNSW Sydney, Australia
| | - Rita K Henderson
- The BioMASS Lab, School of Chemical Engineering, UNSW Sydney, Australia; UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, UNSW Sydney, Australia.
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Gonzalez-Fernandez C, Barreiro-Vescovo S, de Godos I, Fernandez M, Zouhayr A, Ballesteros M. Biochemical methane potential of microalgae biomass using different microbial inocula. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:184. [PMID: 29988471 PMCID: PMC6025826 DOI: 10.1186/s13068-018-1188-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Microalgae biomass is regarded as a potential feedstock for bioenergy purposes through anaerobic digestion (AD). Even though AD is a well-proven technology, the use of new feedstocks requires in-depth studies. A lot of research has been conducted assessing methane yield without paying attention to the anaerobic microbiome and their activities. For such a goal, the present investigation was designed to link methane yield to those two later sludge characteristics. In this sense, different anaerobic sources were tested, namely adapted to microalgae biomass and adapted to sewage sludge. RESULTS Despite the registered differences for the anaerobic microbiome analysis and specific methane activities towards model substrates, sludge adapted to digest sewage sludge did not affect the methane yield of Chlorella sorokiniana and Scenedesmus sp. Opposite to that, sludge samples adapted to digest microalgae exhibited a concomitant increase in methane yield together with increasing digestion temperatures. More specifically, the values attained were 63.4 ± 1.5, 79.2 ± 3.1 and 108.2 ± 1.9 mL CH4 g COD in-1 for psychrophilic, mesophilic and thermophilic digestions, respectively. While psycro- and mesophilic digestion supported similar yields (most probably linked to their anaerobic microbiome resemblance), the values attained for thermophilic digestion evidenced the usefulness of having a highly specific microbiome. The relative abundance of Firmicutes, particularly Clostridia, and Proteobacteria together with an important abundance of hydrogenotrophic methanogens was highlighted in this inoculum. CONCLUSION Overall, this study showed that working with tailored anaerobic microbiome could help avoiding pretreatments devoted to methane yield enhancement.
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Affiliation(s)
| | | | | | | | | | - Mercedes Ballesteros
- Biotechnological Processes Unit, IMDEA Energy, Madrid, Spain
- Biofuels Unit, CIEMAT, Madrid, Spain
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