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SSRN 2023年

作者： Abreu, Thaianaly Leite Estévez, Mario de Carvalho, Leila Moreira de Medeiros, Lorena Lucena da Silva Pereira, Valquíria Cardoso Salu, Bruno Ramos Vilela Oliva, Maria Luiza Madruga, Marta Suely Alencar Bezerra, Taliana Kênia Post-Graduate Program in Food Science and Technology Department of Food Engineering Technology Centre Federal University of Paraiba PB João Pessoa58051-900 Brazil Research Institute of Meat and Meat Products IPROCAR TECAL Research Group Universidad de Extremadura Cáceres10003 Spain Department of Biochemistry Federal University of São Paulo SP São Paulo Brazil

The large amounts of by-products generated in the coffee industry are a problem for a sustainable agro-industry. The aim of this work was to investigate the occurrence of phenolic compounds in organic coffee husks and to evaluate their potential as a source of bioactive dietary components. To achieve this objective, three extracts were prepared, namely extractable polyphenols (EP), hydrolyzable non-extractable polyphenols (HNEP) and non-extractable polyphenols (NEP). These extracts were characterized and evaluated for their bioactive properties after simulated gastrointestinal digestion. The results show that the extraction process affects the occurrence of phenols from coffee peels, especially for caffeic acid, gallic acid, and chlorogenic acid. The condensed phenols and polyphenols found in the extracts and digests not only showed antioxidant properties against ABTS, FRAP and DPPH radicals, but also had remarkable bioavailability and anticoagulant potential. These results highlight the potential health benefits of phytochemicals from coffee husks and open new perspectives for the use of such compounds in dietary supplements. © 2023, The Authors. All rights reserved.

关键词： Antioxidants

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Microalgal lutein: Advancements in production, extraction, market potential, and applications

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Bioresource technology 2023年 389卷 129808页

作者： Kadri, Mohammad Sibtain Singhania, Reeta Rani Anisha, Grace Sathyanesan Gohil, Nisarg Singh, Vijai Patel, Alok Kumar Patel, Anil Kumar Department of Education and Human Potential Development National Dong Hwa University Hualien974301 Taiwan Institute of Aquatic Science and Technology National Kaohsiung University of Science and Technology Kaohsiung City81157 Taiwan Centre for Energy and Environmental Sustainability Uttar Pradesh Lucknow 226 029 India Post-graduate and Research Department of Zoology Government College for Women Kerala Thiruvananthapuram695014 India Department of Biosciences School of Science Indrashil University Rajpur Gujarat Mehsana382715 India Biochemical Process Engineering Division of Chemical Engineering Department of Civil Environmental and Natural Resources Engineering Luleå University of Technology LuleåSE-971 87 Sweden

Lutein, a bioactive xanthophyll, has recently attracted significant attention for numerous health benefits, e.g., protection of eye health, macular degeneration, and acute and chronic syndromes etc. Microalgae have emerged as the best platform for high-value lutein production with high productivity, lutein content, and scale-up potential. Algal lutein possesses numerous bioactivities, hence widely used in pharmaceuticals, nutraceuticals, aquaculture, cosmetics, etc. This review highlights advances in upstream lutein production enhancement and feasible downstream extraction and cell disruption techniques for a large-scale lutein biorefinery. Besides bioprocess-related advances, possible solutions for existing production challenges in microalgae-based lutein biorefinery, market potential, and emerging commercial scopes of lutein and its potential health applications are also discussed. The key enzymes involved in the lutein biosynthesizing Methyl-Erythritol-phosphate (MEP) pathway have been briefly described. This review provides a comprehensive updates on lutein research advancements covering scalable upstream and downstream production strategies and potential applications for researchers and industrialists. © 2023 Elsevier Ltd

关键词： Microalgae

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Waste Valorization from Brazilian Nepheline Syenite Processing as a Strategic Approach to Advancing the Circular Economy

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SSRN 2023年

作者： Santos, Diego Haltiery Rosa, Laura Pereira Alves, Cleidson Rosa Simão, Lisandro Arcaro, Sabrina Klegues Montedo, Oscar Rubem Raupp-Pereira, Fabiano Graduate Program in Materials Science and Engineering University of the Extreme South of Santa Catarina Criciúma88806-000 Brazil Department of Civil Engineering Federal Institute of Santa Catarina Criciúma88813-600 Brazil Research Group on Sustainability and Waste Management Postgraduate Program in Environmental Technology University of Ribeirão Preto Ribeirão Preto14096-900 Brazil Brazil

The growing disparity between the high extraction of natural resources and low use of waste as alternative mineral resources will aggravate the scarcity of natural reserves. Therefore, the current linear economy model must be converted to sustainable economic models, such as the circular economy. To achieve this transition, it is important that waste recovery strategies are implemented with a continuous search for solutions for these materials. Thus, this study investigates the waste from the processing of nepheline syenite stone, to promote its valorization as an alternative mineral resource. The classification, potentiality, quantity/viability and applicability (CPQvA) criteria are used as tools to aid decision-making for the waste valorization. The environmental, physical, chemical, morphological, and durability characteristics of nepheline syenite waste (NSW) are analyzed. The results showed evidence for the substitution of NSW for up to 100% of fine aggregates and 25% of Portland cement in civil construction. Furthermore, NSW yields recoveries of more than 90% of potassium for use in agriculture, and up to 70% of iron ore for use in steelworks. Therefore, the results indicate that NSW is viable for different applications, contributing to industrial symbiosis and a strategy for advancing the circular economy. © 2023, The Authors. All rights reserved.

关键词： Sustainable development

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Densified mixture design algorithm: A novel mix design concept and its application for green concretes incorporating industrial by-products

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environmental Progress and Sustainable Energy 2023年第4期42卷

作者： Nguyen, Tan-Hung Limongan, Andrian H. Nguyen, May Huu Hwang, Chao-Lung Huynh, Trong-Phuoc Department of Civil Engineering Can Tho University of Technology Can Tho Viet Nam Department of Civil and Construction Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Bridge and Tunnel Faculty of Civil Engineering University of Transport Technology Hanoi Viet Nam Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima Japan Taiwan Building Technology Center National Taiwan University of Science and Technology Taipei Taiwan Faculty of Civil Engineering College of Engineering Can Tho University Can Tho Viet Nam

Despite the fact that densified mixture design algorithm (DMDA) has been identified as a promising tool for green concrete mix design, its use in real practice has still been minimal worldwide. Due to the lack of precise information on DMDA computation in earlier studies, this work proposes DMDA including fly ash and ground granulated blast-furnace slag as a viable way to improve the long-term performance of green concrete. To encourage the use of DMDA, this study offers a detailed description of the DMDA mix design, as well as a step-by-step standard operating procedure and an empirical example of the computation. Assessments of the long-term performance of green mixtures (self-consolidating concrete and high-performance concrete) and ordinary Portland cement concrete (designed using the conventional method of American Concrete Institute, ACI) were made. Performances of the ACI (O6000 mixture) and DMDA concretes (S6000 and H6000 mixtures) were then compared in terms of compressive strength, elastic modulus, shrinkage, and creep strain. As a result, all of the concrete samples attained the target strength of above 41 MPa (6000 psi) after only 28 days. Moreover, compressive strength, elastic modulus, shrinkage, and creep strain increased significantly in all of the concretes over curing time. Importantly, the experimental results confirmed that both types of DMDA concrete exhibited higher compressive strength and better long-term performance than the ACI concrete under elastic modulus, creep, and shrinkage aspects. © 2023 American Institute of Chemical Engineers.

关键词： Compressive strength

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Ulvan from green macroalgae: Bioactive properties advancing tissue engineering, drug delivery systems, food industry, agriculture and water treatment

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Bioresource technology Reports 2023年 22卷

作者： Anisha, Grace Sathyanesan Augustianath, Tessy Padmakumari, Savitha Singhania, Reeta Rani Pandey, Ashok Patel, Anil Kumar Post-Graduate and Research Department of Zoology Government College for Women Kerala Thiruvananthapuram695014 India Department of Marine Environmental Engineering College of Hydrosphere National Kaohsiung University of Science and Technology Kaohsiung City81157 Taiwan Sustainable Environment Research Center National Kaohsiung University of Science and Technology Kaohsiung City81157 Taiwan Center for Energy and Environmental Sustainability Uttar Pradesh Lucknow226 029 India Centre for Innovation and Translational Research CSIR-Indian Institute of Toxicology Research Lucknow226 001 India Sustainability Cluster School of Engineering University of Petroleum and Energy Studies Dehradun248 007 India Institute of Aquatic Science and Technology College of Hydrosphere National Kaohsiung University of Science and Technology Kaohsiung City81157 Taiwan

The past decades have witnessed an increased interest in the valorisation of marine biomass for the development of valuable biomaterials. Marine macroalgae have been recognized for their nutritional and health benefits since they produce a myriad of bioactive compounds. Ulvan from green macroalgae demonstrates versatile biological actions that are beneficial for developing biomaterials for tissue engineering, wound dressing and drug delivery applications. The key advantageous features of ulvan in the treatment of neurodegenerative diseases, hepatic and renal diseases and cancer are its antioxidant and immunomodulatory actions. The antiviral and antibacterial action of ulvan is of paramount importance in the scenario of emerging viral and bacterial diseases. The bioactive potentials of ulvan can also be harnessed in aquaculture, agriculture and water treatment systems. In view of the bioactive properties and applications of ulvan, innovative research is still warranted to utilize its potentials to the maximum for the benefit of mankind. © 2023 Elsevier Ltd

关键词： Wastewater treatment

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Development of ceramic membranes from sugarcane bagasse ash for microfiltration of biodiesel production effluents

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Open Ceramics 2025年 22卷

作者： Pin, Clarissa Ferreira Brandler, Danieli Flores, Gabriela Cristina Perusin Kubiaki Levandoski, William Mateus Bruschi, Giovani Jordi Pelissaro, Deise Trevizan Dervanoski, Adriana Korf, Eduardo Pavan Pasquali, Gean Delise Leal Graduate Program in Enviromental Science and Technology Federal University of Fronteira Sul Erechim/RS 99700-970 Brazil Departament of Civil Engineering Integrated Regional University of Alto Uruguai and Missões – Erechim/RS 99709-910 Brazil Departament of Environmental and Sanitary Engineering Federal University of Fronteira Sul Erechim/RS 99700-970 Brazil

Ceramic membranes have emerged as a promising solution for microfiltration processes, offering advantages such as cost-effectiveness, environmental benefits, and the utilization of abundant raw materials derived from agro-industrial solid waste. This study investigates the fabrication and performance of ceramic membranes composed of kaolin the varying proportions of sugarcane bagasse ash (SCBA - 40 wt % and 60 wt %), with focus on efficiency in treating biodiesel wastewater. The membranes were characterized (porosity, average pore diameter, and mechanical strength). The membrane containing 40 wt % SCBA - employed without any pre-treatment- exhibited the best overall performance, achieving porosity of 38.5 %, an pore diameter of 0.9 µm, and mechanical strength of 27 MPa, indicating a favorable balance between permeability and structural integrity. The best-performing membrane achieved removal efficiencies of color 83 % and turbidity 67 %. Microstructural analysis revealed a network of interconnected mesopores, which are particularly effective for the retention of colloidal and suspended contaminants. © 2025 The Authors

关键词： Agro-industrial solid waste Industrial effluent Membrane filtration

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Optimizing cultivation strategies and scaling up for fucoxanthin production using Pavlova sp.

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Bioresource technology 2024年 399卷 130609页

作者： Chen, Chun-Yen Liu, Ping-Yung Chang, Yu-Han Nagarajan, Dillirani Latagan, Mary Joy D. de Luna, Mark Daniel G. Chen, Jih-Heng Chang, Jo-Shu University Center for Bioscience and Biotechnology National Cheng Kung University Tainan Taiwan Department of Biotechnology and Bioindustry Sciences National Cheng Kung University Tainan701 Taiwan Department of Chemical Engineering National Cheng Kung University Tainan Taiwan Institute of Aquatic Science and Technology College of Hydrosphere Science National Kaohsiung University of Science and Technology Nanzih Campus Kaohsiung City Taiwan Energy Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City1101 Philippines Environmental Engineering Program National Graduate School of Engineering University of the Philippines Quezon City Diliman1101 Philippines Department of Chemical Engineering University of the Philippines Diliman Quezon City1101 Philippines Department of Chemical and Materials Engineering National Kaohsiung University of Science and Technology Kaohsiung807 Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung407 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taiwan

The microalgal-based production of fucoxanthin has emerged as an imperative research endeavor due to its antioxidant, and anticancer properties. In this study, three brown marine microalgae, namely Skeletonema costatum, Chaetoceros gracilis, and Pavlova sp., were screened for fucoxanthin production. All strains displayed promising results, with Pavlova sp. exhibiting the highest fucoxanthin content (27.91 mg/g) and productivity (1.16 mg/L·day). Moreover, the influence of various cultivation parameters, such as culture media, salinity, sodium nitrate concentration, inoculum size, light intensity, and iron concentration, were investigated and optimized, resulting in a maximum fucoxanthin productivity of 7.89 mg/L·day. The investigation was further expanded to large-scale outdoor cultivation using 50 L tubular photobioreactors, illustrating the potential of Pavlova sp. and the cultivation process for future commercialization. The biomass and fucoxanthin productivity for the large-scale cultivation were 70.7 mg/L·day and 4.78 mg/L·day, respectively. Overall, the findings demonstrated considerable opportunities for fucoxanthin synthesis via microalgae cultivation and processing. © 2024 Elsevier Ltd

关键词： Microalgae

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Drying properties of Sentang (Azadirachta excelsa) dried under different temperatures

Drying properties of Sentang (Azadirachta excelsa) dried und...

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International Conference on science and technology 2020, ICoST 2020

作者： Mohamad Ruddin, Noor Zulai'ha Rasid, Shaharlina Hermawan, Andi Forest Resource Technology Program Bachelor of Applied Science Faculty of Bioengineering and Technology Universiti Malaysia Kelantan Kelantan Malaysia Forest Resource Technology Centre for Post Graduate Studies Universiti Malaysia Kelantan Pangkalan Chepa Malaysia Forest Resource Technology Program Faculty of Bioengineering and Technology Universiti Malaysia Kelantan Kelantan Malaysia

In this study, we investigated the drying properties of Sentang (Azadirachta excelsa) dried at different temperatures. Sentang tree planted in Kelantan, Malaysia, was used in this study. Drying specimens with dimensions of 30 ×150 × 500 mm were dried under air-drying conditions, a constant temperature of 60, 80, 100, and 120 °C until the moisture content (MC) of the specimens reaches an equilibrium moisture content (EMC) at each drying condition. The drying properties of the specimens were then examined. The results confirmed that drying temperature had a significant effect on drying time. As expected, drying Sentang under air-drying conditions demanding considerable time than the other drying conditions. © Published under licence by IOP Publishing Ltd.

关键词： Drying

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Effect of chemical and biological additives on production of biogas from coffee pulp silage

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Scientific Reports 2023年第1期13卷 1-11页

作者： Getachew, Mengizam Tsegaye Hiruy, Andualem Mekonnen Mazharuddin, Majid Mohiuddin Mamo, Tadios Tesfaye Feseha, Temesgen Aragaw Mekonnen, Yedilfana Setarge Center for Environmental Science College of Natural and Computational Sciences Addis Ababa University Addis Ababa Ethiopia Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Chemistry National Taiwan University Taipei 10617 Taiwan

Energy is the foundation of the global economy and is essential to human survival. Nevertheless, more than 60% of it comes from fossil fuels. That is not a replenished and scarce source. However, a sizable amount of organic waste is generated every minute throughout the world and can be used as a raw material to produce renewable energy. Among them, Coffee processing generates a huge amount of solid and liquid waste that is organic and can serve as raw material for biofuel production. Since coffee beans and powder are Ethiopia’s main exports, coffee pulp is easily accessible. Therefore, the main goal of this project is to convert this waste, which largely consists of organic materials, into a valuable product called Methane. The purity and yield of methane productivity are significantly influenced by the type of additives we use. This work systematically investigates the effect of chemical and biological additives on the productivity and purity of the Biogas from the coffee pulp silage in batch systems under mesophilic temperature (38 °C) for different ensiling periods and additive proportions. The chemical additives recorded the maximum biogas production (2980 ml) at an ensiling period of 40 days with high purity of about 70% biogas. The minimum Biogas was recorded at the ensiling period of 10 days by the control (T1) treatments, which was 634 ml. This work proves that biological additives produced the highest quality and quantity of Biogas from coffee silage. © 2023, The Author(s).

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Microplastic "Seasoning": A Study on Microplastic Contamination of Sea Salts in Bangladesh and the Risks Associated with its Consumption

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SSRN 2023年

作者： Siddique, Mohammad Abdul Momin Uddin, Azad Hossain, Md. Soliman Arifur Rahman, Shahriar Md. Rahman, M. Safiur Kibria, Golam Malafaia, Guilherme University of South Bohemia in Ceske Budejovice Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrogenases Research Institute of Fish Culture and Hydrobiology Zatisi 728/II Vodnany389 25 Czech Republic Department of Oceanography Noakhali Science and Technology University Noakhali3814 Bangladesh Department of Environmental Science and Disaster Management Noakhali Science and Technology University Noakhali3814 Bangladesh Water Quality Research Laboratory Chemistry Division Atomic Energy Center Bangladesh Atomic Energy Commission 4-Kazi Nazrul Islam Avenue Shahbag Dhaka1000 Bangladesh School of Science RMIT University Australia Laboratory of Toxicology Applied to the Environment Goiano Federal Institute GO Urutaí Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute GO Urutaí Brazil Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia MG Uberlândia Brazil Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil

This study investigated microplastics (MPs) in 54 commercial sea salts of 18 different sea salt brands in Bangladesh, comprising coarse, medium, and small-sized salts. The presence of MPs in the 18 different sea salt brands was 100%, where the mean MPs abundance was 471.67 MPs/kg: ranging between 300 to 670 MPs/kg. The MPs abundance in different sea salts varied significantly (p © 2023, The Authors. All rights reserved.

关键词： Health risks

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