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Potency of microalgae for animal feed and aquaculture feed: A short review

AIP Conference Proceedings 2023年第1期2683卷

作者： Inggar Dianratri Hadiyanto Hadiyanto Yoyon Wahyono Wahyu Zuli Pratiwi Department of Chemical Engineering Faculty of Engineering Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang Central Java 50275 Indonesia Doctoral Program of Environmental Science School of Postgraduate Studies Diponegoro University Jl. Imam Bardjo SH Pleburan Semarang Central Java 50241 Indonesia

Animal feed production soared due to the increasing demand for fresh meat and fish. The high cost of animal feed production causes animal feed producers to look for more economical and environmentally friendly alternatives. Microalgae have the potential to add nutrients to animal feed and aquaculture feed because they contain high-value biomolecules. Bioactive compounds containing microalgae such as protein, carbohydrates, polyunsaturated fatty acids (PUFA), vitamins, and other compounds have been shown to improve feed efficiency and the quality of animal products. The contribution of microalgae to meet nutritional needs in animal feed/aquaculture is present in this review. The metabolism of microalgae produced during photosynthetic activity depends on natural conditions such as the location of cultivation, the possibility of contaminants in the culture, and their physiological response to biotic and abiotic factors, such as the availability of light intensity, temperature, pH, nutrients, and growth phase. The quality of microalgae biomass certainly affects the quality of animal feed. From various studies that have been carried out, several parameters can affect the efficiency and quality of animal products, including the amount of microalgae biomass added to the feed, the age of the animal, and the duration of feeding the animal.

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Enhancing the mixotrophic production of PUFA lipid-rich microalga Chlorella biomass using hydroponic effluent and its application in a zero-waste multiproduct biorefinery to promote a circular bioeconomy

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Energy Conversion and Management: X 2025年 27卷

作者： Nanthakrit Sriket Antira Wichaphian Apiwit Kamngoen Jeeraporn Pekkoh Tawanchai Khuendee Yupa Chromkaew Benjamas Cheirsilp Wageeporn Maneechote Supakit Chaipoot Gochakorn Kanthakat Kuan Shiong Khoo Yoong Kit Leong Sirasit Srinuanpan Master of Science Program in Applied Microbiology (International Program) Department of Biology Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Department of Biology Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Microbial Biorefinery and Biochemical Process Engineering Research Group Chiang Mai University Chiang Mai 50200 Thailand Center of Excellence in Microbial Diversity and Sustainable Utilization Chiang Mai University Chiang Mai 50200 Thailand Department of Plant and Soil Sciences Faculty of Agriculture Chiang Mai University Chiang Mai 50200 Thailand Program of Biotechnology Faculty of Agro-Industry Prince of Songkla University Hat Yai Songkhla 90110 Thailand Office of Research Administration Office of the University Chiang Mai University Chiang Mai 50200 Thailand Multidisciplinary Research Institute Chiang Mai University Chiang Mai 50200 Thailand Faculty of Agro-Industry Chiang Mai University Chiang Mai 50100 Thailand Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung 407 Taiwan

This study optimized the mixotrophic cultivation of Chlorella sp. G049 using hydroponic effluent to maximize biomass, lipid, and polyunsaturated fatty acid accumulation. Optimal conditions, identified through response surface methodology, included 20-hour light exposure, 60.03 µmol/m 2 /s light intensity, and supplementation with 7.21 g/L glucose and 14.22 mg/L indole-3-acetic acid. Under these conditions, Chlorella sp. G049 achieved 3.77 g/L dry cell weight, 23.78 % lipid content, and 27.78 % polyunsaturated fatty acid (PUFA). Nutrient removal efficiencies were 100 % for ammonium, 63.10 % for nitrate, 98.85 % for phosphate, and 71.30 % for chemical oxygen demand, with carbon dioxide fixation reaching 1.00 g/L/day. A sequential biorefinery approach enabled sustainable biomass valorization, with high polyunsaturated fatty acid content for biodiesel and protein extraction yielding an amino acid profile with notable antioxidant activity. The residual biomass served as a biofertilizer, enhancing soil quality and promoting plant growth in lettuce. These results highlight the potential of Chlorella sp. G049 for sustainable wastewater treatment, carbon sequestration, and multiproduct biorefinery applications.

关键词： Hydroponic Effluent Biorefinery Zero-waste Microalgae PUFA

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Towards sustainability by integrated microbial degradation and closed-loop biological recycling of the copolymer poly (3-hydroxybutyrate-co-3-hydroxyvalerate) by Azohydromonas australica DSM 1124

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Polymer Degradation and Stability 2025年 239卷

作者： Nanthachai, Sirirach Kim, Beom Soo Honda, Kohsuke Napathorn, Suchada Chanprateep Department of Microbiology Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok10330 Thailand Program in Biotechnology Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok10330 Thailand Department of Chemical Engineering Chungbuk National University Cheongju Chungbuk28644 Korea Republic of International Center for Biotechnology Osaka University 2-1 Yamadaoka Suita Osaka565-0871 Japan

Achieving a fully closed-loop waste management system for polyhydroxyalkanoates (PHA) is a key focus for sustainable solutions. Among the one hundred forty-two PHA-producing strains tested, Azohydromonas australica DSM 1124 showed a remarkable ability to degrade poly (3-hydroxybutyrate-co-3-hydroxyvalerate, PHBV) on PHBV-suspended agar media. The effects of different carbon‒nitrogen (C/N) ratios (mol/mol) were investigated in mineral salt media (MSM) and compared with those in yeast extract peptone (YP) media. The C/N ratio of 770 yielded the greatest PHBV degradation, with 79.4 ± 4.8 % film weight loss, and subsequently resulted in 27.6 ± 2.2 % PHA content and a YP/S of 0.245 g-PHBV produced/g-PHBV film in a one pot process. Various techniques were employed, including differential scanning calorimetry (DSC), scanning electron microscopy (SEM), gel permeation chromatography (GPC) and X-ray diffraction (XRD). X-ray diffraction confirmed that orthorhombic α-form crystals with helical chain conformations and β-form crystals with planar zigzag conformations were significantly degraded. Biological recycling in a 10-L fermenter resulted in 70.3 ± 0.1 % PHBV film weight loss by the action of PHA depolymerase enzymes, leading to the formation of oligomers and monomers. Subsequently, A. australica DSM 1124 has assimilated and internalized these monomers as substrates for the biosynthesis of renewed PHBV, achieving a PHA content of 12.9 ± 0.1 %. This study demonstrates the potential of A. australica DSM 1124 for integrated microbial degradation and closed-loop recycling, offering a one-pot sustainable approach to mitigate PHA waste accumulation in ecosystems. © 2025 Elsevier Ltd

关键词： Gel permeation chromatography

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Erratum to: Materials and devices for flexible and stretchable photodetectors and light-emitting diodes

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Nano Research 2021年第11期14卷 4362-4362页

作者： Jun-Kyul Song Min Sung Kim Seungwon Yoo Ja Hoon Koo Dae-Hyeong Kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul08826Republic of Korea School of Chemical and Biological Engineering and Institute of Chemical Processes Seoul National UniversitySeoul08826Republic of Korea Interdisciplinary Program for Bioengineering Seoul National UniversitySeoul08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea

Erratum to Nano Research 2021,14(9):2919-2937 https://***/10.1007/s 12274-021-3447-3 The figure caption of Figure 1,instead of Figure 1 Schematic illustration of various nanomaterials and organic materials used in fle... 详细信息

关键词： diodes emitting Figure

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Memory seeds enable high structural phase purity in 2D perovskite films for high-efficiency devices

Research Square

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Research Square 2021年

作者： Sidhik, Siraj Li, Wenbin Samani, Mohammad H.K. Zhang, Hao Wang, Yafei Hoffman, Justin Fehr, Austin K. Wong, Michael Katan, Claudine Even, Jacky Marciel, Amanda B. Kanatzidis, Mercouri G. Blancon, Jean-Christophe Mohite, Aditya D. Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley‐Curl Institute Rice University HoustonTX77005 United States Department of Chemistry Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States UMR 6226 RennesF-35000 France Univ Rennes INSA Rennes CNRS Institut FOTON UMR 6082 RennesF-35000 France

Two-dimensional (2D) perovskites are a class of halide perovskites offering a pathway for realizing efficient and durable optoelectronic devices. However, the broad chemical phase space and lack of understanding of film formation have led to quasi-2D perovskite films with polydispersity in perovskite layer thicknesses, which have hindered devices performance and stability. Here, we demonstrate a scalable approach involving dissolution of single-phase crystalline powders with homogeneous perovskite layer thickness in desired solvents, to fabricate 2D perovskite thin-films with high phase purity. In-situ characterizations reveal the presence of sub-micron-sized seeds in solution that preserve the memory of the dissolved single-crystals and dictate the nucleation and growth of grains with identical thickness of the perovskite layers in thin-films. Photovoltaic devices fabricated with such films, yields an efficiency of 17.1% and 1.20V open-circuit voltage, while preserving 97.5% of their peak-performance after 800 hours under illumination without any external thermal management. © 2021, CC BY.

关键词： Nucleation

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Cu^+-incorporated TiO_2 overlayer on Cu_2O nanowire photocathodes for enhanced photoelectrochemical conversion of CO_2 to methanol

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Journal of Energy Chemistry 2018年第1期27卷 264-270页

作者： Kangha Lee Seokwon Lee Hyunjin Cho Sunil Jeong Whi Dong Kim Sooho Lee Doh C.Lee Department of Chemical and Biomolecular Engineering(BK21+program) KAIST Institute for the NanocenturyKorea Advanced Institute of Science and Technology(KAIST)

In this paper, we report photoelectrochemical（PEC） conversion of carbon dioxide（CO_2） using photocathodes based on Cu_2O nanowires（NWs） overcoated with Cu~＋-incorporated crystalline TiO_2（TiO_2–Cu~＋）shell. Cu_2O NW photocathodes show remanent photocurrent of 5.3% after 30 min of PEC reduction of CO_*** coating Cu_2O with TiO_2–Cu~＋ overlayer, the remanent photocurrent is 27.6%, which is an increase by5.2 fold. The charge transfer resistance of Cu_2O/TiO_2–Cu~＋ is 0.423 k/cm2, whereas Cu_2O photocathode shows resistivity of 0.781 k/cm2 under irradiation. Mott–Schottky analysis reveals that Cu~＋ species embedded in TiO_2 layer is responsible for enhanced adsorption of CO_2 on TiO_2 surface, as evidenced by the decrease of capacitance in the Helmholtz layer. On account of these electrochemical and electronic effects by the Cu~＋ species, the Faradaic efficiency（FE） of photocathodes reaches as high as 56.5% when TiO_2–Cu~＋ is added to Cu_2O, showing drastic increase from 23.6% by bare Cu_2O photocathodes.

关键词： Photoelectrochemical CO2 reductionMethanol generation Copper oxide Titanium dioxide Cu＋ catalyst

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Brachiation of a polymer chain in the presence of a dynamic network

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Physical Review E 2020年第2期102卷 020501(R)-020501(R)页

作者： Pamela C. Cai Brad A. Krajina Andrew J. Spakowitz Department of Chemical Engineering Stanford University Stanford California 94305 USA Department of Materials Science Stanford University Stanford California 94305 USA Department of Applied Physics Stanford University Stanford California 94305 USA Biophysics Program Stanford University Stanford California 94305 USA

The viscoelastic behavior of a physically crosslinked gel involves a spectrum of molecular relaxation processes, which at the single-chain level involve the chain undergoing transient hand-to-hand motion through the network. We develop a self-consistent theory for describing transiently associating polymer solutions that captures these complex dynamics. A single polymer chain transiently binds to a viscoelastic background that represents the polymer network formed by surrounding polymer chains. The viscoelastic background is described in the equation of motion as a memory kernel, which is self-consistently determined based on the predicted rheological behavior from the chain itself. The solution to the memory kernel is translated into rheological predictions of the complex modulus over a wide range of frequencies to capture the time-dependent behavior of a physical gel. Using the loss tangent predictions, a phase diagram is shown for the sol-gel transition of polymers with dynamic association affinities. This theory provides a predictive, molecular-level framework for the design of associating gels and supramolecular assemblies with targeted rheological properties.

关键词： Polymer gels Rheological properties Viscoelasticity Polymer theory

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Study of domestic wastewater in oil and gas field: A case study in the Cangkring river, Tuban, East Java

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IOP Conference Series: Earth and Environmental science 2022年第1期963卷

作者： A S Patimah A Prasetya S H Murti Department of Mining Engineering Universitas Papua 98314 West Papua Indonesia Student of Doctoral Program in Environmental Science School of Postgraduate Universitas Gadjah Mada 55281 Yogyakarta Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Gadjah Mada 55281 Yogyakarta Indonesia Department of Geographic Information Science Faculty of Geography Universitas Gadjah Mada 55281 Yogyakarta Indonesia

Mudi Field, Tuban is an oil and gas producing area in East Java. Pad B Mudi Field is an office area for the oil and gas industry. The oil and gas industrial office area in Pad B Mudi Field produces domestic wastewater, which is channeled into the Cangkring River. Domestic wastewater flows directly into rivers. This study aims to determine the water quality of the Cangkring River region, which is mixed with domestic wastewater from Pad B Mudi Field. Samples of river water were taken at 3 points along with the river flow. Sample evaluation included physical, chemical, and biological characteristics. Sample test results were adjusted according to domestic wastewater quality standards and water quality standards. Parameters tested include temperature, TSS, pH, BOD5, COD, ammonia (NH3), phosphate (PO43-), chromium, oils and fats, and total coliforms. The highest values of the three samples for each parameter were temperature of 20.8 °C, TSS of 13 mg/L, pH of 7.8, BOD5 of 6.53 mg/L, COD of 17.38 mg/L, ammonia (NH3) of 6.13 mg/L, phosphate (PO43-) of 1.15 mg/L, chromium of 0.01 mg/L, oils and fats of 1.6 mg/L, and total coliform of 2400/100 mL. The values of the three points of the Cangkring River water test results met all the parameters of the domestic wastewater quality standards. In testing water quality standards, Cangkring River water met all parameters of class 4 water quality standards, namely water quality that can be used to irrigate agriculture. So it can be concluded that the condition of the Cangkring River water is safe for the community but is not suitable for drinking water, recreational infrastructure, and aquaculture.

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Development and Validation of High-Performance Soil-Cement Panels: A Sustainable and Economical Alternative for Civil Construction

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Buildings 2025年第10期15卷 1697-1697页

作者： Bernat Vinolas Prat Demisson Renato Ferreira Luis Guilherme Monteiro Oliveira João Vinícios Wirbitzki da Silveira Frank Alisson De Carvalho Marcus Vinícius Felix Ellem Eva Augusto Rocha José Domingos Fabris Alexandre Christófaro Silva Institute of Science and Technology Faculty of Science and Technology Federal University of Jequitinhonha and Mucuri Valleys Campus JK Diamantina 39100000 MG Brazil Institute of Science Engineering and Technology Faculty of Civil Engineering Federal University of Jequitinhonha and Mucuri Valleys Campus Mucuri Teófilo Otoni 39803371 MG Brazil Polytechnic Institute Department of Electrical Engineering Pontifical Catholic University of Minas Gerais Belo Horizonte 30535901 MG Brazil Institute of Science and Technology Chemical Engineering Federal University of Jequitinhonha and Mucuri Valleys Campus JK Diamantina 39100000 MG Brazil Department of Forestry Engineering Postgraduate Program in Forestry Science in the Theme of Ecological Restoration Federal University of the Jequitinhonha and Mucuri Valleys Campus JK Diamantina 39100000 MG Brazil Vice-Rector of Administration Construction Projects Division Federal University of the Jequitinhonha and Mucuri Valleys Campus JK Diamantina 39100000 MG Brazil Institute of Exact Sciences Department of Chemistry ICEx Federal University of Minas Gerais Pampulha Campus Belo Horizonte 31270901 MG Brazil Department of Forestry Engineering Faculty of Forestry Engineering Federal University of Jequitinhonha and Mucuri Valleys Campus JK Diamantina 39100000 MG Brazil

Despite its advantages, conventional soil-cement has limitations in terms of mechanical strength and durability, especially in environments with high humidity or high structural demands. The development of high-performance soil-cement (HPSC) presents significantly superior mechanical properties. The decentralized production of these panels has resulted in a cost reduction of more than 40%, making them an affordable alternative for low-income communities. Even so, providing technical support for the popularization of HPSC is crucial for the advancement of civil construction and to enable the expansion of affordable and sustainable housing for vulnerable communities. This study focuses on the development of a high-performance soil-cement panel, including its manufacturing process and the materials used. The panel was produced using Yellow Argisol soil, found locally in abundant quantities, modified with sand. Measurements of flexural strength and water absorption were carried out, together with a comparison of the strength of high-performance concrete (HPC) found in the literature. The developed panels present an average flexural strength of 6.71 MPa. Additionally, water absorption reached 5.99%, indicating the high performance of this material, which is comparable to high-performance concrete but more economical and sustainable. This contribution confirms the viability of transferring HPSC technology and highlights its social impact on civil construction.

关键词： concrete plates sustainability flexural strength water absorption

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Optimization of Pyrolysis Parameters for Production of Biochar From Banana Peels: Evaluation of Biochar Application on the Growth of Ipomoea aquatica

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Frontiers in Energy Research 2021年 8卷

作者： Te, Wei Zun Muhanin, Kavinesh Nair Manor Chu, Yu-Ming Selvarajoo, Anurita Singh, Ajit Ahmed, Shams Forruque Vo, Dai-Viet N. Show, Pau Loke Department of Chemical and Environmental Engineering University of Nottingham Malaysia Semenyih Malaysia School of Biosciences University of Nottingham Malaysia Semenyih Malaysia Science and Math Program Asian University for Women Chattogram Bangladesh Department of Mathematics Huzhou University Huzhou China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science and Technology Changsha China Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN) Nguyen Tat Thanh University Ho Chi Minh City Viet Nam

Banana peels waste can be utilized to produce high quality biochar that can be incorporated into the soil for sustainable production of crops. This research analyzed several properties of the biochar produced from the banana peel at different temperatures, residence times and heating rates. This study focuses on the biochar yield and the EDX analysis of the biochar produced. Response surface methodology using central composite design (CCD) was used to optimize these parameters in the batch reactor pyrolysis system. These factors were operated in different ranges for banana peels, in which pyrolysis temperature (200 to 600°C), residence time (60 to 180 min) and heating rate (5 to 15°C·min−1) were varied using 20 experiments respectively. Quality of the biochar was determined based on the biochar yield and O/C ratio. The optimum biochar chosen from the CCD model was applied to several pots of Ipomoea aquatica in different biochar dosage levels of 0, 3, 9 and 15 g (0, 1, 3 and 5 wt% of soil) respectively. Pot experiment was conducted with completely randomized design (CRD) of one factor with five replications to correlate the average plant heights with the biochar dosage levels. Results showed that biochar dosage of 1% yields the highest average final Ipomoea aquatica plant height of 37.04 cm. © Copyright © 2021 Te, Muhanin, Chu, Selvarajoo, Singh, Ahmed, Vo and Show.

关键词： Pyrolysis

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