1
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Brückner K, Griehl C. Permeabilization of the cell wall of Chlorella sorokiniana by the chitosan-degrading protease papain. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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2
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Biodiesel production from wet microalgae: Progress and challenges. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Ideris F, Zamri MFMA, Shamsuddin AH, Nomanbhay S, Kusumo F, Fattah IMR, Mahlia TMI. Progress on Conventional and Advanced Techniques of In Situ Transesterification of Microalgae Lipids for Biodiesel Production. ENERGIES 2022; 15:7190. [DOI: 10.3390/en15197190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Global warming and the depletion of fossil fuels have spurred many efforts in the quest for finding renewable, alternative sources of fuels, such as biodiesel. Due to its auxiliary functions in areas such as carbon dioxide sequestration and wastewater treatment, the potential of microalgae as a feedstock for biodiesel production has attracted a lot of attention from researchers all over the world. Major improvements have been made from the upstream to the downstream aspects related to microalgae processing. One of the main concerns is the high cost associated with the production of biodiesel from microalgae, which includes drying of the biomass and the subsequent lipid extraction. These two processes can be circumvented by applying direct or in situ transesterification of the wet microalgae biomass, hence substantially reducing the cost. In situ transesterification is considered as a significant improvement to commercially produce biodiesel from microalgae. This review covers the methods used to extract lipids from microalgae and various in situ transesterification methods, focusing on recent developments related to the process. Nevertheless, more studies need to be conducted to further enhance the discussed in situ transesterification methods before implementing them on a commercial scale.
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4
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Huang Z, Guo S, Guo Z, He Y, Chen B. Integrated green one-step strategy for concurrent recovery of phycobiliproteins and polyunsaturated fatty acids from wet Porphyridium biomass. Food Chem 2022; 389:133103. [DOI: 10.1016/j.foodchem.2022.133103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/31/2022] [Accepted: 04/26/2022] [Indexed: 12/19/2022]
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5
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Almaghrabi O, Almulaiky YQ. A biocatalytic system obtained via immobilization of urease onto magnetic metal/alginate nanocomposite: Improving reusability and enhancing stability. BIOCATAL BIOTRANSFOR 2022. [DOI: 10.1080/10242422.2022.2082871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Omar Almaghrabi
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Yaaser Q. Almulaiky
- Department of Chemistry, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Applied Science, Taiz University, Taiz, Yemen
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6
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Xie D, Ji X, Zhou Y, Dai J, He Y, Sun H, Guo Z, Yang Y, Zheng X, Chen B. Chlorella vulgaris cultivation in pilot-scale to treat real swine wastewater and mitigate carbon dioxide for sustainable biodiesel production by direct enzymatic transesterification. BIORESOURCE TECHNOLOGY 2022; 349:126886. [PMID: 35217166 DOI: 10.1016/j.biortech.2022.126886] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 05/28/2023]
Abstract
This study firstly addressed real swine wastewater (RSW) treatment by an indigenous Chlorella vulgaris MBFJNU-1 in 5-m3 outdoor open raceway ponds and then direct enzymatic transesterification of the resulting lipids from the wet biomass for sustainable biodiesel production. Compared to the control group, C. vulgaris MBFJNU-1 at 3% CO2 achieved higher microalgal biomass (478.5 mg/L) and total fatty acids content (21.3%), higher CO2 bio-fixation (63.2 mg/L/d) and lipid (9.1 mg/L/d) productivities, and greater nutrients removals (total nitrogen, 82.1%; total phosphorus, 28.4%; chemical oxygen demand, 37.1%). The highest biodiesel conversion (93.3%) was attained by enzymatic transesterification of wet disrupted Chlorella biomass with 5% lipase TL and 5% phospholipase PLA. Moreover, the enzymatic transesterification gave around 83% biodiesel conversion in a 15-L stirred tank bioreactor. Furthermore, the integrated process was a cost-effective approach to treat RSW and mitigate CO2 for microalgal biodiesel production, based on the mass and energy balances analysis.
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Affiliation(s)
- Dian Xie
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Xiaowei Ji
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Youcai Zhou
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Jingxuan Dai
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Yongjin He
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China.
| | - Han Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Zheng Guo
- Department of Biological and Chemical Engineering, Aarhus University, Gustav WiedsVej 10, 8000 Aarhus C, Denmark
| | - Yi Yang
- Fuqing King Dnarmsa Spirulina Co., LTD, Fuzhou 350300, China
| | - Xing Zheng
- Fuqing King Dnarmsa Spirulina Co., LTD, Fuzhou 350300, China
| | - Bilian Chen
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
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7
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Biodiesel production from microalgae using lipase-based catalysts: Current challenges and prospects. ALGAL RES 2022. [DOI: 10.1016/j.algal.2021.102616] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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Xiao X, Zhou Y, Liang Z, Lin R, Zheng M, Chen B, He Y. A novel two-stage heterotrophic cultivation for starch-to-protein switch to efficiently enhance protein content of Chlorella sp. MBFJNU-17. BIORESOURCE TECHNOLOGY 2022; 344:126187. [PMID: 34710603 DOI: 10.1016/j.biortech.2021.126187] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
This work aimed to firstly establish an efficient and novel two-stage cultivation process to produce microalgal biomass rich in protein using a heterotrophic Chlorella sp. MBFJNU-17 strain. In the first-stage cultivation, to reduce the glucose and urea utilization, microalga achieved a high biomass at 40 g/L glucose and 1 g/L urea; meantime, the expression from starch biosynthesis genes of microalga was up-regulated under nitrogen-starvation conditions for starch accumulation (55.01%). In the second-stage cultivation, based on the over-compensation effect, Chlorella cells after the first-stage cultivation were further treated at 5 g/L glucose and 3 g/L urea to up-regulate starch degradation, central carbon metabolism and urea absorption genes expression to drive intracellular starch-to-protein switch for biosynthetic protein (59.75%). Moreover, microalga performed similar characteristics in a 10-L fermenter by the established process. Taken together, Chlorella sp. MBFJNU-17 was the promising candidate to produce high-value biomass enriched in protein by the established two-stage cultivation.
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Affiliation(s)
- Xuehua Xiao
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Youcai Zhou
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Zhibo Liang
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Rongzhao Lin
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Mingmin Zheng
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Bilian Chen
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Yongjin He
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China.
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9
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Ha GS, Saha S, Basak B, Kurade MB, Kim GU, Ji MK, Ahn Y, Salama ES, Woong Chang S, Jeon BH. High-throughput integrated pretreatment strategies to convert high-solid loading microalgae into high-concentration biofuels. BIORESOURCE TECHNOLOGY 2021; 340:125651. [PMID: 34333346 DOI: 10.1016/j.biortech.2021.125651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/19/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
The commercial feasibility of energy-efficient conversion of highly concentrated microalgal suspensions to produce high-titer biofuels is a major bottleneck due to high energy consumption. Herein, high-titer biofuels (bioethanol, higher-alcohols, and biodiesel) were generated from carbohydrate-rich Chlamydomonas mexicana and lipid-rich Chlamydomonas pitschmannii biomass through energy-saving microwave pretreatment, successive fermentation, and transesterification. Microwave pretreatment needed low specific energy (4.2 MJ/kg) for 100 g/L of microalgal suspension. Proposed sustainable integrated pretreatments method achieved unprecedented total conversion efficiency (67%) and highest biomass utilization (87%) of C. pitschmannii (100 g/L) with high yields of bioethanol (0.48 g-ethanol/g-carbohydrates), higher-alcohols (0.44 g-higher-alcohols/g-proteins), and biodiesel (0.90 g-biodiesel/g-lipids). Transmission electron microscopy showed the changes in the microalgal cellular integrity before and after sequential fermentations. Energy-efficient integrated pretreatments enhanced the extraction efficiency and whole utilization of high-concentration microalgae to generate high-titer biofuels with minimum waste production.
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Affiliation(s)
- Geon-Soo Ha
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea
| | - Shouvik Saha
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea
| | - Bikram Basak
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea
| | - Mayur B Kurade
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea
| | - Gyeong-Uk Kim
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea
| | - Min-Kyu Ji
- Environmental Assessment Group, Korea Environment Institute, Yeongi-gun 30147, South Korea
| | - Yongtae Ahn
- Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology, South Korea
| | - El-Sayed Salama
- Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - Soon Woong Chang
- Department of Environmental Engineering, Kyonggi University, Suwon 16627, South Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, South Korea.
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11
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López-Fernández J, Dolors Benaiges M, Valero F. Second- and third-generation biodiesel production with immobilised recombinant Rhizopus oryzae lipase: Influence of the support, substrate acidity and bioprocess scale-up. BIORESOURCE TECHNOLOGY 2021; 334:125233. [PMID: 33990020 DOI: 10.1016/j.biortech.2021.125233] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
Rhizopus oryzae lipase immobilised onto differently functionalised polymethacrylate (Purolite®) and magnetite superparamagnetic supports was assessed as a catalyst for biodiesel production with pomace oil. The presence of surface hydrocarbon chains increased the operational stability of the biocatalysts supported on Purolite® and superparamagnetic particles up to 9 and 2 times, respectively. By contrast, the presence of functional groups had no effect on the initial transesterification rate, which was twice higher with the lipase immobilised onto Purolite®. Also, functionalising Purolite® with epoxide and octadecyl groups led to the highest biodiesel and volumetric productivity. This biocatalyst with other substrates including makauba, jatropha, waste cooking oil, and microbial oil, led to similar initial reaction rates. However, simply raising substrate acidity from 0.5 to 2% increased the operational stability of the biocatalysts 15 times. A synergistic effect between acyl-acceptor concentration and substrate acidity was observed. The transesterification reaction was successfully scaled up to 50 mL.
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Affiliation(s)
- Josu López-Fernández
- Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain
| | - Maria Dolors Benaiges
- Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain
| | - Francisco Valero
- Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain.
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12
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Hormozi Jangi SR, Akhond M. High throughput urease immobilization onto a new metal-organic framework called nanosized electroactive quasi-coral-340 (NEQC-340) for water treatment and safe blood cleaning. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.03.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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13
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Huang Z, Zhong C, Dai J, Li S, Zheng M, He Y, Wang M, Chen B. Simultaneous enhancement on renewable bioactive compounds from Porphyridium cruentum via a novel two-stage cultivation. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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14
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Qiu C, He Y, Huang Z, Qiu W, Huang J, Wang M, Chen B. Biosafety evaluation of Nannochloropsis oculata and Schizochytrium sp. oils as novel human milk fat substitutes. Food Funct 2021; 12:2972-2984. [PMID: 33690766 DOI: 10.1039/d0fo03000g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The biosafety assessment of novel human milk fat substitutes (HMFs) from microalgae oils of Nannochloropsis oculata and Schizochytrium sp. was evaluated by testing the cytotoxic activity using IEC-6 cells, and by conducting a sub-chronic 28-day dietary study using Sprague-Dawley (SD) suckling rats in this study. The results of the cytotoxic activity of IEC-6 cells treated with HMFs showed no apparent effect on cell viability at the tested concentrations (0-1000 μg mL-1). For the 28-day sub-chronic study, five rat dietary feeds with 7.5% fat were designed to have the DHA content in the range from 0 to 2.0% using corn oil as a basal oil. After the 28-day treatment, SD rats fed HMFs did not show toxicity signs and adverse effects, based on the results of clinical observation, body weight, food consumption, behavior, hematology, clinical chemistry, and necropsy findings. These results could lead to the conclusion that the inclusion of the new synthesized HMFs into the pre-weaning SD rat diet was acceptable for SD rats and did not exhibit toxic characteristics and adverse features, indicating that the HMFs from microalgal oils were safe and had the potential to be used as a promising feedstock in infant formula.
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Affiliation(s)
- Changyang Qiu
- College of Life Sciences, Fujian Normal University, Fuzhou 350117, China.
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15
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Zeb L, Shafiq M, Chi ZY, Xiu ZL. Separation of microalgal docosahexaenoic acid-rich oils using a microwave-assisted three-phase partitioning system. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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16
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Influences of Water Content in Feedstock Oil on Burning Characteristics of Fatty Acid Methyl Esters. Processes (Basel) 2020. [DOI: 10.3390/pr8091130] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Strong alkaline-catalyst transesterification with short-chain alcohol is generally used for biodiesel production due to its dominant advantages of shorter reaction time and higher conversion rate over other reactions. The existence of excess water content in the feedstock oil might retard the transesterification rate and in turn deteriorate the fuel characteristics of the fatty acid methyl esters. Hence, optimum water content in the raw oil, aimed towards both lower production cost and superior fuel properties, becomes significant for biodiesel research and industrial practices. Previous studies only concerned the influences of water contents on the yield or conversion rate of fatty acid methyl esters through transesterification of triglycerides. The effects of added water in the reactant mixture on burning characteristics of fatty acid methyl esters are thus first investigated in this study. Raw palm oil was added with preset water content before being transesterified. The experimental results show that the biodiesel produced from the raw palm oil containing a 0.05 wt.% added water content had the highest content of saturated fatty acids and total fatty acid methyl esters (FAME), while that containing 0.11 wt.% water content had the lowest content of total FAME and fatty acids of longer carbon chains than C16 among the biodiesel products. Regarding burning characteristics, palm-oil biodiesel made from raw oil with a 0.05 wt.% added water content among those biodiesels was found to have the highest distillation temperatures, flash point, and ignition point, which implies higher safety extents during handling and storage of the fuel. The added water content 0.05 wt.% in raw oil was considered the optimum to produce palm-oil biodiesel with superior fuel structure of fatty acids and burning characteristics. Higher or lower water content than 0.05 wt.% would cause slower nucleophilic substitution reaction and thus a lower conversion rate from raw oil and deteriorated burning characteristics in turn.
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Ding W, Jin W, Zhou X, Li SF, Tu R, Han SF, Chen C, Feng X, Huang Y. Enhanced lipid extraction from the biodiesel-producing microalga Chlorella pyrenoidosa cultivated in municipal wastewater via Daphnia ingestion and digestion. BIORESOURCE TECHNOLOGY 2020; 306:123162. [PMID: 32197194 DOI: 10.1016/j.biortech.2020.123162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
Herein, a novel innovative lipid co-extraction strategy using the biodiesel-producing microalga Chlorella pyrenoidosa and planktonic cladoceran Daphnia was proposed. Co-extraction occurred as Daphnia ingested and digested microalgal cells in a pre-treatment process; thereafter, lipids from these organisms were extracted. Composition of fatty acids from C. pyrenoidosa and Daphnia were appropriate as potential biodiesel feedstocks. Daphnia had different absorption and conversion capacities of various fatty acids from C. pyrenoidosa, which showed potential for improving biodiesel characteristics. Linoleic acid (LA, C18:2n-6) and alpha-linolenic acid (ALA, C18:3n-3) were absorbed significantly into the body of Daphnia. The optimal lipid extraction and fatty acid methyl esters (FAMEs) recovery rates were up to 41.08% and 12.35%, respectively, which were greater than that of the traditional lipid extraction method due to the rich oil content of Daphnia. Overall, this lipid co-extraction process serves a potential Daphnia utilization as an economical, green, low-energy way for microalgae biodiesel production.
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Affiliation(s)
- Wanqing Ding
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wenbiao Jin
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Xu Zhou
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Shao-Feng Li
- Department of Building and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Renjie Tu
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Song-Fang Han
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaochi Feng
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yan Huang
- Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
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Chen Z, Shao S, He Y, Luo Q, Zheng M, Zheng M, Chen B, Wang M. Nutrients removal from piggery wastewater coupled to lipid production by a newly isolated self-flocculating microalga Desmodesmus sp. PW1. BIORESOURCE TECHNOLOGY 2020; 302:122806. [PMID: 31982846 DOI: 10.1016/j.biortech.2020.122806] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/08/2020] [Accepted: 01/10/2020] [Indexed: 06/10/2023]
Abstract
A newly isolated microalgal strain, Desmodesmus sp. PW1, possessing not only high potential for removing nitrogen and phosphorous from piggery wastewater but excellent self-flocculating ability, was provided here. Strain PW1 grew well in diluted and undiluted piggery wastewater, and could effectively remove total nitrogen and total phosphorus with removal rates up to 90% and 70%, respectively. In the laboratory scale by 30-L photobioreactor, microalga also performed well in TN (65.3%) and TP (83.5%) removal. Strain PW1 cultivated in the stationary phase achieved high self-flocculating efficiency (>90%) in 2.5 h of settling; meanwhile, temperature and pH slightly influenced on the flocculation. The potential mechanism on self-flocculation was considered related to hydrophobic extracellular polymeric substances. Furthermore, the fatty acid compositions of PW1 were mainly hexadecanoic acid, oleic acid and linoleic acid. Taken together, Desmodesmus sp. PW1 was the promising candidate to overcome the microalgae harvesting problem in piggery wastewater treatment.
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Affiliation(s)
- Zhihong Chen
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Shanshan Shao
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Yongjin He
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Qingqing Luo
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Mingmin Zheng
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Meiqing Zheng
- Fuzhou Clean Biotech Co., Ltd., Fuzhou 350100, China
| | - Bilian Chen
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, Fuzhou, Fujian 350117, China
| | - Mingzi Wang
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, China; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, Fuzhou, Fujian 350117, China.
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19
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Zhang J, He Y, Luo M, Chen F. Utilization of enzymatic cell disruption hydrolysate of Chlorella pyrenoidosa as potential carbon source in algae mixotrophic cultivation. ALGAL RES 2020. [DOI: 10.1016/j.algal.2019.101730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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20
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He Y, Huang Z, Zhong C, Guo Z, Chen B. Pressurized liquid extraction with ethanol as a green and efficient technology to lipid extraction of Isochrysis biomass. BIORESOURCE TECHNOLOGY 2019; 293:122049. [PMID: 31484103 DOI: 10.1016/j.biortech.2019.122049] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/17/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
This work was the first time to establish a green pressurized liquid extraction (PLE) process to extract microalgal lipids from Isochrysis biomass. PLE with ethanol exhibited superior lipid extraction performance in comparison to Soxhlet and Folch methods and PLE with n-hexane. To reduce the cost in ethanol utilization, ethanol concentration was optimized and found that PLE with 90% ethanol concentration obtained the highest lipid extraction efficiency (41.5 wt%) and total fatty acids (TFAs) recovery value (92.17 wt%) using Isochrysis sp. biomass. Results about lipid class detected by TLC-FID technique showed that ethanol concentration distinctly affected the content of lipidic class during lipid extraction by PLE. Similarly, the process with 90% ethanol concentration achieved over 90 wt% of TFAs recovery values with three different Isochrysis species. Overall, PLE process mediated with ethanol was a promising approach to extract Isochrysis-derived lipids from sustainable microalgal biomass for food application.
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Affiliation(s)
- Yongjin He
- College of Life Science, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China; Department of Engineering, Aarhus University, Gustav WiedsVej 10, 8000 Aarhus C, Denmark; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China.
| | - Zicheng Huang
- College of Life Science, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China
| | - Chen Zhong
- College of Life Science, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China
| | - Zheng Guo
- Department of Engineering, Aarhus University, Gustav WiedsVej 10, 8000 Aarhus C, Denmark
| | - Bilian Chen
- College of Life Science, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology of Ministry of Education, Fujian Normal University, No.1, Keji Road, Minhou, Fuzhou 350117, China
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Choi YY, Patel AK, Hong ME, Chang WS, Sim SJ. Microalgae Bioenergy with Carbon Capture and Storage (BECCS): An emerging sustainable bioprocess for reduced CO2 emission and biofuel production. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100270] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Qiu C, He Y, Huang Z, Li S, Huang J, Wang M, Chen B. Lipid extraction from wet Nannochloropsis biomass via enzyme-assisted three phase partitioning. BIORESOURCE TECHNOLOGY 2019; 284:381-390. [PMID: 30959375 DOI: 10.1016/j.biortech.2019.03.148] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
A green and efficient enzyme assisted three phase partitioning (EA-TPP) process was firstly developed to extract microalgal lipids using wet Nannochloropsis sp. biomass. In the pretreatment of microalgal biomass by four hydrolytic enzymes, TPP obtained a higher TFAs lipid extraction efficiency by cellulase compared with the resting enzymes. After optimization by EA-TPP of the wet disrupted Nannochloropsis biomass (3 g), the maximum TFAs extraction yield (90.40%) was attained at 20% ammonium sulphate, 6-7 pH, 1:2 slurry/tert-butanol ratio and 70 °C for 2 h incubation time and two extraction cycles. Moreover, results also revealed that the lipidic species compositions of Nannochloropsis sp. biomass were greatly related with the EA-TPP parameters. In the laboratory scale for wet disrupted microalgae biomass, EA-TPP process achieved 88.70% TFAs extraction yield under the optimized conditions. In all, EA-TPP process could be a promising approach to extract microalgae lipids for food application using wet microalgae biomass.
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Affiliation(s)
- Changyang Qiu
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Yongjin He
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Key Laboratory of Feed Biotechnology, The Ministry of Agriculture of the People's Republic of China, Beijing 100081, China
| | - Zicheng Huang
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Shaofeng Li
- College of Life Science, Fujian Normal University, Fuzhou 350117, China
| | - Jian Huang
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Mingzi Wang
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Bilian Chen
- College of Life Science, Fujian Normal University, Fuzhou 350117, China; Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou 350117, China.
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He Y, Wang X, Wei H, Zhang J, Chen B, Chen F. Direct enzymatic ethanolysis of potential Nannochloropsis biomass for co-production of sustainable biodiesel and nutraceutical eicosapentaenoic acid. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:78. [PMID: 30992715 PMCID: PMC6449970 DOI: 10.1186/s13068-019-1418-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/27/2019] [Indexed: 05/24/2023]
Abstract
BACKGROUND Marine microalga Nannochloropsis is a promising source for the production of renewable and sustainable biodiesel in replacement of depleting petroleum. Other than biodiesel, Nannochloropsis is a green and potential resource for the commercial production of nutraceutical eicosapentaenoic acid (EPA, C20:5). In recent studies, low-value biodiesel can be achieved by transesterification of Nannochloropsis biomass. However, it is undoubtedly wasteful to produce microalgal biodiesel containing EPA from nutritional and economical aspects. A new strategy was addressed and exploited to produce low-value bulky biodiesel along with EPA enrichment via enzymatic ethanolysis of Nannochloropsis biomass with a specific lipase. RESULTS Cellulase pretreatment on Nannochloropsis sp. biomass significantly improved the biodiesel conversion by direct ethanolysis with five enzymes from Candida antarctica (CALA and CALB), Thermomyces lanuginosus (TL), Rhizomucor miehei (RM), and Aspergillus oryzae (PLA). Among these five biocatalysts, CALA was the best suitable enzyme to yield high biodiesel conversion and effectively enrich EPA. After optimization, the maximum biodiesel conversion (46.53-48.57%) was attained by CALA at 8:1 ethanol/biomass ratio (v/w) in 10-15% water content with 10% lipase weight at 35 °C for 72 h. Meanwhile, EPA (60.81%) was highly enriched in microalgae NPLs (neutral lipids and polar lipids), increasing original EPA levels by 1.51-fold. Moreover, this process was re-evaluated with two Nannochloropsis species (IMET1 and Salina 537). Under the optimized conditions, the biodiesel conversions of IMET1 and Salina 537 by CALA were 63.41% and 54.33%, respectively. EPA contents of microalgal NPLs were 50.06% for IMET1 and 53.73% for Salina 537. CONCLUSION CALA was the potential biocatalyst to discriminate against EPA in the ethanolysis of Nannochloropsis biomass. The biodiesel conversion and EPA enrich efficiency of CALA were greatly dependent on lipidic class and fatty acid compositions of Nannochloropsis biomass. CALA-catalyzed ethanolysis with Nannochloropsis biomass was a promising approach for co-production of low-value biodiesel and high-value microalgae products rich in EPA.
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Affiliation(s)
- Yongjin He
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing, 100871 China
- Key Laboratory of Feed Biotechnology, The Ministry of Agriculture of the People’s Republic of China, Beijing, 100081 China
- College of Life Science, Fujian Normal University, Fuzhou, 350117 China
| | - Xiaofei Wang
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing, 100871 China
| | - Hehong Wei
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing, 100871 China
| | - Jianzhi Zhang
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing, 100871 China
| | - Bilian Chen
- College of Life Science, Fujian Normal University, Fuzhou, 350117 China
| | - Feng Chen
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Food & Bioresource Engineering, College of Engineering, Peking University, Beijing, 100871 China
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518000 China
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Biodiesel Production (FAEEs) by Heterogeneous Combi-Lipase Biocatalysts Using Wet Extracted Lipids from Microalgae. Catalysts 2019. [DOI: 10.3390/catal9030296] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The production of fatty acids ethyl esters (FAEEs) to be used as biodiesel from oleaginous microalgae shows great opportunities as an attractive source for the production of renewable fuels without competing with human food. To ensure the economic viability and environmental sustainability of the microbial biomass as a raw material, the integration of its production and transformation into the biorefinery concept is required. In the present work, lipids from wet Isochrysis galbana microalga were extracted with ethyl acetate with and without drying the microalgal biomass (dry and wet extraction method, respectively). Then, FAEEs were produced by lipase-catalyzed transesterification and esterification of the extracted lipids with ethanol using lipase B from Candida antarctica (CALB) and Pseudomonas cepacia (PC) lipase supported on SBA-15 mesoporous silica functionalized with amino groups. The conversion to FAEEs with CALB (97 and 85.5 mol% for dry and wet extraction, respectively) and PC (91 and 87 mol%) biocatalysts reached higher values than those obtained with commercial Novozym 435 (75 and 69.5 mol%). Due to the heterogeneous nature of the composition of microalgae lipids, mixtures with different CALB:PC biocatalyst ratio were used to improve conversion of wet-extracted lipids. The results showed that a 25:75 combi-lipase produced a significantly higher conversion to FAEEs (97.2 mol%) than those produced by each biocatalyst independently from wet-extracted lipids and similar ones than those obtained by each lipase from the dry extraction method. Therefore, that optimized combi-lipase biocatalyst, along with achieving the highest conversion to FAEEs, would allow improving viability of a biorefinery since biodiesel production could be performed without the energy-intensive step of biomass drying.
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