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Manikandan S, Deena SR, Subbaiya R, Vijayan DS, Vickram S, Preethi B, Karmegam N. Waves of change: Electrochemical innovations for environmental management and resource recovery from water - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 366:121879. [PMID: 39043086 DOI: 10.1016/j.jenvman.2024.121879] [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: 04/24/2024] [Revised: 04/27/2024] [Accepted: 07/12/2024] [Indexed: 07/25/2024]
Abstract
Environmental electrochemistry and water resource recovery are covered in this review. The study discusses the growing field's scientific basis, methods, and applications, focusing on innovative remediation tactics. Environmental electrochemistry may solve water pollution and extract resources. Electrochemical methods may effectively destroy or convert pollutants. This method targets heavy metals, organic compounds, and emerging water contaminants such as pharmaceuticals and microplastics, making it versatile. Environmental electrochemistry and resource recovery synergize to boost efficiency and sustainability. Innovative electrochemical methods can extract or synthesise metals, nutrients, and energy from wastewater streams, decreasing treatment costs and environmental effect. The study discusses electrocoagulation, electrooxidation, and electrochemical advanced oxidation processes and their mechanics and performance. Additionally, it discusses current electrode materials, reactor designs, and process optimisation tactics to improve efficiency and scalability. Resource recovery in electrochemical remediation methods is also examined for economic and environmental feasibility. Through critical examination of case studies and techno-economic evaluations, it explains the pros and cons of scaling up these integrated techniques. This study covers environmental electrochemistry and resource recovery's fundamental foundations, technology advances, and sustainable water management consequences.
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Affiliation(s)
- S Manikandan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - S R Deena
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - R Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box 21692, Kitwe, Zambia; Oliver R. Tambo Africa Research Chair Initiative (ORTARChI) Environment and Development, The Copperbelt University, P.O. Box 21692, Kitwe, Zambia
| | - D S Vijayan
- Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Vinayaka Mission Research Foundation (VMRF - DU), Paiyanur, Chennai, 603104, Tamil Nadu, India
| | - Sundaram Vickram
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - B Preethi
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - N Karmegam
- PG and Research Department of Botany, Government Arts College (Autonomous), Salem, 636 007, Tamil Nadu, India.
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Lee A, Lan JCW, Jambrak AR, Chang JS, Lim JW, Khoo KS. Upcycling fruit waste into microalgae biotechnology: Perspective views and way forward. FOOD CHEMISTRY. MOLECULAR SCIENCES 2024; 8:100203. [PMID: 38633725 PMCID: PMC11021955 DOI: 10.1016/j.fochms.2024.100203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/25/2024] [Accepted: 04/07/2024] [Indexed: 04/19/2024]
Abstract
Fruit and vegetable wastes are linked to the depletion of natural resources and can pose serious health and environmental risks (e.g. eutrophication, water and soil pollution, and GHG emissions) if improperly managed. Current waste management practices often fail to recover high-value compounds from fruit wastes. Among emerging valorization methods, the utilization of fruit wastes as a feedstock for microalgal biorefineries is a promising approach for achieving net zero waste and sustainable development goals. This is due to the ability of microalgae to efficiently sequester carbon dioxide through photosynthesis, utilize nutrients in wastewater, grow in facilities located on non-arable land, and produce several commercially valuable compounds with applications in food, biofuels, bioplastics, cosmetics, nutraceuticals, pharmaceutics, and various other industries. However, the application of microalgal biotechnology towards upcycling fruit wastes has yet to be implemented on the industrial scale due to several economic, technical, operational, and regulatory challenges. Here, we identify sources of fruit waste along the food supply chain, evaluate current and emerging fruit waste management practices, describe value-added compounds in fruit wastes, and review current methods of microalgal cultivation using fruit wastes as a fermentation medium. We also propose some novel strategies for the practical implementation of industrial microalgal biorefineries for upcycling fruit waste in the future.
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Affiliation(s)
- Alicia Lee
- Algae Bioseparation Research Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan
| | - John Chi-Wei Lan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan
| | - Anet Režek Jambrak
- Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb, Croatia
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
- Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 407, Taiwan
| | - Jun Wei Lim
- HICoE-Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Kuan Shiong Khoo
- Algae Bioseparation Research Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India
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Peng Y, Yao S, Li A, Xiong F, Sun G, Li Z, Zhou H, Chen Y, Gong X, Peng F, Liu Z, Zhang C, Zeng J. Investigating quantitative approach for microalgal biomass using deep convolutional neural networks and image recognition. BIORESOURCE TECHNOLOGY 2024; 403:130889. [PMID: 38797362 DOI: 10.1016/j.biortech.2024.130889] [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: 03/28/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
The effective monitoring of microalgae cultivation is crucial for optimizing their energy utilization efficiency. In this paper, a quantitative analysis method, using microalgae images based on two convolutional neural networks, EfficientNet (EFF) and residual network (RES), is proposed. Suspension samples prepared from two types of dried microalgae powders, Rhodophyta (RH) and Spirulina (SP), were used to mimic real microalgae cultivation settings. The method's prediction accuracy of the algae concentration ranges from 0.94 to 0.99. RH, with a distinctively pronounced red-green-blue value shift, achieves a higher prediction accuracy than SP. The prediction results of the two algorithms were significantly superior to those of a linear regression. Additionally, RES outperforms EFF in terms of its generalization ability and robustness, which is attributable to its distinct residual block architecture. The RES provides a viable approach for the image-based quantitative analysis.
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Affiliation(s)
- Yang Peng
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China.
| | - Shen Yao
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Aoqiang Li
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - FeiFei Xiong
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Guangwen Sun
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Zhouzhou Li
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Huaichun Zhou
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Yang Chen
- School of Electrical Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Xun Gong
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Fanke Peng
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Zhuolin Liu
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, No 1, Daxue Road, Xuzhou, Jiangsu 221116, China
| | - Chuxuan Zhang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
| | - Jianhui Zeng
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, China
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Cai C, Liu Y, Xu Y, Zhang J, Wei B, Xu C, Wang H. Mineral-element-chelating activity of food-derived peptides: influencing factors and enhancement strategies. Crit Rev Food Sci Nutr 2024:1-15. [PMID: 38841814 DOI: 10.1080/10408398.2024.2361299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Mineral elements including calcium, iron, and zinc play crucial roles in human health. Their deficiency causes public health risk globally. Commercial mineral supplements have limitations; therefore, alternatives with better solubility, bioavailability, and safety are needed. Chelates of food-derived peptides and mineral elements exhibit advantages in terms of stability, absorption rate, and safety. However, low binding efficiency limits their application. Extensive studies have focused on understanding and enhancing the chelating activity of food-derived peptides with mineral elements. This includes obtaining peptides with high chelating activity, elucidating interaction mechanisms, optimizing chelation conditions, and developing techniques to enhance the chelating activity. This review provides a comprehensive theoretical basis for the development and utilization of food-derived peptide-mineral element chelates in the food industry. Efforts to address the challenge of low binding rates between peptides and mineral elements have yielded promising results. Optimization of peptide sources, enzymatic hydrolysis processes, and purification schemes have helped in obtaining peptides with high chelating activity. The understanding of interaction mechanisms has been enhanced through advanced separation techniques and molecular simulation calculations. Optimizing chelation process conditions, including pH and temperature, can help in achieving high binding rates. Methods including phosphorylation modification and ultrasonic treatment can enhance the chelating activity.
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Affiliation(s)
- Chaonan Cai
- School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Yuting Liu
- School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Yuling Xu
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Juntao Zhang
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Benmei Wei
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Chengzhi Xu
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Haibo Wang
- College of Life Science and Technology, Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, Hubei Engineering University, Xiaogan, China
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Liao L, Shen Y, Xie C, Zhang Y, Yao C. Ultrasonication followed by aqueous two-phase system for extraction, on-site modification and isolation of microalgal starch with reduced digestibility. ULTRASONICS SONOCHEMISTRY 2024; 106:106891. [PMID: 38701549 PMCID: PMC11078702 DOI: 10.1016/j.ultsonch.2024.106891] [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: 03/03/2024] [Revised: 04/16/2024] [Accepted: 04/28/2024] [Indexed: 05/05/2024]
Abstract
Microalgae are new and sustainable sources of starch with higher productivity and flexible production modes than conventional terrestrial crops, but the downstream processes need further development. Here, ultrasonication (with power of 200 W or 300 W and duration of 10, 15, 20, or 25 min) was applied to simultaneously extract and modify starch from a marine microalga Tetraselmis subcordiformis for reducing the digestibility, and an aqueous two-phase system (ATPS) of ethanol/NaH2PO4 was then used to isolate the starches with varied properties. Increasing ultrasonic duration facilitated the partition of starch into the bottom pellet, while enhancing the ultrasonic power was conducive to the allocation in the interphase of the ATPS. The overall starch recovery yield reached 73 ∼ 87 % and showed no significant difference among the ultrasonic conditions tested. The sequential ultrasonication-ATPS process successfully enriched the starch with purities up to 65 % ∼ 88 %, which was among the top levels reported in microalgal starch isolated. Ultrasonication produced more amylose which was mainly fractionated into the interface of the ATPS. The digestibility of the starch was altered under different ultrasonic conditions and varied from different ATPS phases as well, with the one under the ultrasonic power of 200 W for 15 min at the bottom pellet having the highest resistant starch content (RS, 39.7 %). The structural and compositional analysis evidenced that the ultrasonication-ATPS process could exert impacts on the digestibility through altering the surface roughness and fissures of the starch granules, modulating the impurity compositions (protein and lipid) that could interact with starch, and modifying the long- and short-range ordered structures. The developed ultrasonication-ATPS process provided novel insights into the mechanism and strategy for efficient production of functional starch from microalgae with a potential in industrial application.
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Affiliation(s)
- Longren Liao
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yuhan Shen
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Chenglin Xie
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yongkui Zhang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Changhong Yao
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
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Lin MW, Lin CS, Chen YT, Huang SQ, Yang YC, Zhang WX, Chiu WH, Lin CH, Kuo CM. Continuous microalgal culture module and method of culturing microalgae containing macular pigment. BIORESOURCE TECHNOLOGY 2024; 401:130714. [PMID: 38641299 DOI: 10.1016/j.biortech.2024.130714] [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: 02/20/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
This study established and investigated continuous macular pigment (MP) production with a lutein (L):zeaxanthin (Z) ratio of 4-5:1 by an MP-rich Chlorella sp. CN6 mutant strain in a continuous microalgal culture module. Chlorella sp. CN6 was cultured in a four-stage module for 10 days. The microalgal culture volume increased to 200 L in the first stage (6 days). Biomass productivity increased to 0.931 g/L/day with continuous indoor white light irradiation during the second stage (3 days). MP content effectively increased to 8.29 mg/g upon continuous, indoor white light and blue light-emitting diode irradiation in the third stage (1 day), and the microalgal biomass and MP concentrations were 8.88 g/L and 73.6 mg/L in the fourth stage, respectively. Using a two-step MP extraction process, 80 % of the MP was recovered with a high purity of 93 %, and its L:Z ratio was 4-5:1.
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Affiliation(s)
- Meng-Wei Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Chih-Sheng Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan; Center for Intelligent Drug Systems and Smart Bio-systems (IDS(2)B), National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Yu-Tso Chen
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan City 320, Taiwan
| | - Shao-Qian Huang
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan City 320, Taiwan
| | - Yi-Chun Yang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Wen-Xin Zhang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Wei-Hong Chiu
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Cheng-Han Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Chiu-Mei Kuo
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan City 320, Taiwan.
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Zheng S, Sun S, Zou S, Song J, Hua L, Chen H, Wang Q. Effects of culture temperature and light regimes on biomass and lipid accumulation of Chlamydomonas reinhardtii under carbon-rich and nitrogen-limited conditions. BIORESOURCE TECHNOLOGY 2024; 399:130613. [PMID: 38513922 DOI: 10.1016/j.biortech.2024.130613] [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: 01/28/2024] [Revised: 03/16/2024] [Accepted: 03/18/2024] [Indexed: 03/23/2024]
Abstract
This study investigated the impacts of various culture temperatures and light regimes on growth and biochemical constituents of Chlamydomonas reinhardtii under carbon-supply and nitrogen-limited conditions to improve oil production in algal cells. Results displayed that under a 30 ℃ and 150 μE/m2/s regime, there was a significant increase in biomass, total lipids, and lipid productivity. Specifically, these parameters reached 1.83 g/L, 36.25 %, and 130.73 mg/L/d, respectively. Remarkably, prolonging the photoperiod further enhanced the aforementioned three parameters, reaching peak levels of 1.92 g/L, 41.10 %, and 157.54 mg/L/d, respectively, recorded at a 24/0h photoperiod. Compared with cultures grown under normal conditions, these values displayed increments of 1.21-fold, 74.88 %, and 3.01-fold, respectively. Additionally, under optimal conditions, the soluble sugar content reached 79.72 mg/g, and the biodiesel properties were improved. These findings indicate that moderately increasing temperature, light intensity, and photoperiod could achieve the co-production of biomass, lipids, and sugars in C. reinhardtii.
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Affiliation(s)
- Shiyan Zheng
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China; Jiangsu Institute of Marine Resources Development, Jiangsu Ocean University, Lianyungang 222005, China
| | - Shourui Sun
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Shangyun Zou
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Jiamei Song
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Lan Hua
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222005, China
| | - Hui Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Qiang Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China; Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng 475004, China.
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Wang L, He Y, Zhu Y, Ping Q, Li Y. Insight into using hydrochar to alleviate ammonia nitrogen inhibition during anaerobic digestion of waste activated sludge: Performance, metagenomic and metabolomic signatures. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170196. [PMID: 38246376 DOI: 10.1016/j.scitotenv.2024.170196] [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: 12/11/2023] [Revised: 01/13/2024] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
In this study, hydrochar (HCR) was used to alleviate high ammonia inhibition to the anaerobic digestion (AD) of waste activated sludge (WAS) and to elucidate the inner microorganism mechanism. After HCR addition, the cumulative methane yield increased by 73.6 % and 35.6 % under ammonia inhibition levels of 3000 and 6000 mg/L, respectively. Metagenomic analysis showed that HCR enriched the diversity of hydrogenotrophic methanotrophs, and the relative abundances of functional microorganisms with electron transfer capabilities (Geobacteraceae bacterium etc.) were 1.5-7.8 times higher than those without HCR addition. Metabolomics analysis implied that metabolites related to fatty acid degradation, such as glutaric acid and hexadecanal, were downregulated (2.9-15.7 %) under ammonia inhibition conditions and that HCR regulates metabolites in the methane metabolic pathway. Moreover, HCR changed the methanogenic pathway from hydrogenotrophic methanogenesis to multiple pathways under ammonia inhibition conditions, especially methanolic and methylotrophic methanogenesis, which facilitated the methane yield. This study provides valuable information for understanding the inner microbial mechanism of HCR addition on alleviating high ammonia inhibition to AD of WAS, and gives basic knowledge for the application of AD of WAS under ammonia inhibition conditions.
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Affiliation(s)
- Lin Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, People's Republic of China
| | - Yunpeng He
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Yuting Zhu
- Tongji Architectural Design (Group) Co., Ltd., Environmental Engineering Branch, Shanghai 200092, People's Republic of China
| | - Qian Ping
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, People's Republic of China.
| | - Yongmei Li
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, People's Republic of China
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9
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Gaysina LA. Influence of pH on the Morphology and Cell Volume of Microscopic Algae, Widely Distributed in Terrestrial Ecosystems. PLANTS (BASEL, SWITZERLAND) 2024; 13:357. [PMID: 38337891 PMCID: PMC10857513 DOI: 10.3390/plants13030357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024]
Abstract
Terrestrial algae are a group of photosynthetic organisms that can survive in extreme conditions. pH is one of the most important factors influencing the distribution of algae in both aquatic and terrestrial ecosystems. The impact of different pH levels on the cell volume and other morphological characteristics of authentic and reference strains of Chlorella vulgaris, Bracteacoccus minor, Pseudoccomyxa simplex, Chlorococcum infusionum, and Vischeria magna were studied. Chlorella vulgaris, Pseudoccomyxa simplex, and Vischeria magna were the most resistant species, retaining their morphology in the range of pH 4-11.5 and pH 3.5-11, respectively. The change in pH towards acidic and alkaline levels caused an increase in the volume of Pseudoccomixa simplex and Vischeria magna cells, according to a polynomial regression model. The volume of Chlorella vulgaris cells increased from a low to high pH according to a linear regression model. Changes in pH levels did not have a significant impact on the volume of Bracteacoccus minor and Chlorococcum infusionum cells. Low and high levels of pH caused an increase in oil-containing substances in Vischeria magna and Bracteacoccus minor cells. Our study revealed a high resistance of the studied species to extreme pH levels, which allows for us to recommend these strains for broader use in biotechnology and conservation studies of natural populations.
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Affiliation(s)
- Lira A. Gaysina
- Department of Bioecology and Biological Education, M. Akmullah Bashkir State Pedagogical University, 450008 Ufa, Russia;
- All-Russian Research Institute of Phytopathology, 143050 Bolshye Vyazemy, Russia
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10
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Encarnação T, Nicolau N, Ramos P, Silvestre E, Mateus A, de Carvalho TA, Gaspar F, Massano A, Biscaia S, Castro RAE, Nogueira BA, Singh P, Pacheco D, Patrício T, Fausto R, Sobral AJFN. Recycling Ophthalmic Lens Wastewater in a Circular Economy Context: A Case Study with Microalgae Integration. MATERIALS (BASEL, SWITZERLAND) 2023; 17:75. [PMID: 38203929 PMCID: PMC10779472 DOI: 10.3390/ma17010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
Water pollution poses a global threat to ecosystems and human health and is driven by the presence of various contaminants in wastewater, including nano- and microplastics. Despite the magnitude of this problem, the majority of global wastewater is released untreated into water bodies. To combat this issue, a multi-strategy approach is needed. This study explores a circular economy-based solution for treating emerging pollutants, particularly wastewater from ophthalmic spectacle lens production. Our approach integrates solid waste materials into polymeric and cement matrices while also utilising wastewater for microalgae cultivation. This innovative strategy focuses on biomass generation and economic valorisation. By adopting a circular economy model, we aim to transform environmental pollutants from wastewater into valuable organic products. A key component of our approach is the utilisation of microalgae, specifically Nannochloropsis sp., known for its high lipid content and resilience. This microalgae species serves as a promising biobased feedstock, supporting the production of innovative biobased products, such as biopolymers, for ophthalmic lens manufacturing. Our interdisciplinary approach combines microalgae technology, analytical chemistry, cement production, and polymer processing to develop a sustainable circular economy model that not only addresses environmental concerns, but also offers economic benefits. This study underscores the potential of harnessing high-value products from waste streams and underscores the importance of circular economy principles in tackling pollution and resource challenges.
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Affiliation(s)
- Telma Encarnação
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Nadia Nicolau
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Pedro Ramos
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Elsa Silvestre
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
- Opticentro, 2460-071 Alcobaça, Portugal
| | - Artur Mateus
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tomás Archer de Carvalho
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Florindo Gaspar
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Anabela Massano
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Sara Biscaia
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Ricardo A. E. Castro
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Bernardo A. Nogueira
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
| | - Poonam Singh
- PTScience, Avenida do Atlântico, N 16, Office 5.07, Parque das Nações, 1990-019 Lisboa, Portugal; (N.N.); (P.R.); (E.S.); (P.S.)
| | - Diana Pacheco
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Tatiana Patrício
- Centre for Rapid and Sustainable Product Development (CDRSP), Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal; (A.M.); (T.A.d.C.); (F.G.); (A.M.); (S.B.); (T.P.)
| | - Rui Fausto
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University, Ataköy Campus, Bakirköy, Istanbul 34156, Turkey
| | - Abílio J. F. N. Sobral
- Coimbra Chemistry Centre-Institute of Molecular Sciences (CQC-IMS), Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal; (R.A.E.C.); (B.A.N.); (D.P.); (R.F.); (A.J.F.N.S.)
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Barreto JVDO, Casanova LM, Junior AN, Reis-Mansur MCPP, Vermelho AB. Microbial Pigments: Major Groups and Industrial Applications. Microorganisms 2023; 11:2920. [PMID: 38138065 PMCID: PMC10745774 DOI: 10.3390/microorganisms11122920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Microbial pigments have many structures and functions with excellent characteristics, such as being biodegradable, non-toxic, and ecologically friendly, constituting an important source of pigments. Industrial production presents a bottleneck in production cost that restricts large-scale commercialization. However, microbial pigments are progressively gaining popularity because of their health advantages. The development of metabolic engineering and cost reduction of the bioprocess using industry by-products opened possibilities for cost and quality improvements in all production phases. We are thus addressing several points related to microbial pigments, including the major classes and structures found, the advantages of use, the biotechnological applications in different industrial sectors, their characteristics, and their impacts on the environment and society.
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Affiliation(s)
| | | | | | | | - Alane Beatriz Vermelho
- Bioinovar Laboratory, Institute of Microbiology Paulo de Goes, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.V.d.O.B.); (L.M.C.); (A.N.J.); (M.C.P.P.R.-M.)
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