{"title":"Fabrication, characterization and flocculation properties of starch, chitosan or cellulose based graft copolymers: A review","authors":"Shubhangi Pandey , Anmol Kumar , Krishna Kumar , S. Krishnamoorthi , Kranthikumar Tungala","doi":"10.1016/j.biteb.2025.102023","DOIUrl":"10.1016/j.biteb.2025.102023","url":null,"abstract":"<div><div>Wastewater treatment has been most obligatory, as food industries, pharmaceutical companies, textile mills, etc., are disposing of their wastes in water bodies. Graft copolymers, in which synthetic polymers are grafted on backbones of natural polymers of diverse sources, have come into light for contaminated water treatment. In this review article, we have mounted up various synthesis methods used, along with their corresponding mechanisms, for the fabrication of starch, chitosan or cellulose based graft copolymers. Characterization techniques that are commonly used for the confirmation of the fabricated graft copolymers have been discussed. Further, the process of flocculation, its influencing factors, and mechanisms involved in flocculation have been detailed. This review also explores the treatment of wastewater discharged from several industries, which includes toxic heavy metal ions, harmful dyes, coalmine dust, mining waste, and paper and pulp industrial middle effluent. Further, saline retention, sludge dewatering, and microalgal biomass harvesting have been detailed.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102023"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Xylitol production from lignocellulosic biowastes","authors":"Preeti Kumari , Parikshana Mathur , Charu Sharma , Payal Chaturvedi","doi":"10.1016/j.biteb.2025.102025","DOIUrl":"10.1016/j.biteb.2025.102025","url":null,"abstract":"<div><div>Xylitol is an increasingly popular sugar substitute in food, pharmaceutical, and personal care products. It is a pentitol-type polyol, exhibiting broad O<img>H stretching bands at 3200–3600 cm<sup>−1</sup> indicating multiple hydroxyl groups and distinct structural characteristics. Traditionally produced through chemical processes, xylitol production has shifted towards more sustainable biotechnological methods using lignocellulosic biowaste like sugarcane bagasse, corn cobs, and wheat and rice straw. Xylose Reductase (XR) and Xylitol Dehydrogenase (XDH), are instrumental in biotechnological production, and metabolic engineering advances have improved xylitol yield by optimizing these pathways and enabling co-utilization of sugars in mixed hydrolysates. Techno-Economic Analysis (TEA) and Life Cycle Assessment (LCA) reveal that biotechnological methods, while eco-friendly and adaptable, are currently more feasible at smaller scales compared to the capital-intensive chemical methods preferred for large-scale biorefineries. This review emphasizes the potential of lignocellulosic biowaste as feedstock for xylitol production, underscoring the importance of metabolic engineering, process optimization, and sustainability.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102025"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zixuan Ren , Roberto E. Armenta , Marianne Su-Ling Brooks
{"title":"Arachidonic acid production by Mortierella alpina MA2-2: Optimization of combined nitrogen sources in the culture medium using mixture design","authors":"Zixuan Ren , Roberto E. Armenta , Marianne Su-Ling Brooks","doi":"10.1016/j.biteb.2025.102049","DOIUrl":"10.1016/j.biteb.2025.102049","url":null,"abstract":"<div><div>Arachidonic acid (ARA) is an omega-6 fatty acid that is essential for human nutrition. Commercial production of ARA by fermentation is of great interest, as it is present in relatively low levels in breast milk<em>.</em> The production of ARA by the fungus <em>Mortierella alpina</em> is affected by the types of nitrogen available in the culture medium as well as the carbon to nitrogen (C:N) ratio. In this study, the C:N ratio and combined nitrogen sources were investigated for optimal production of biomass, lipids, ARA content and concentrations by <em>M. alpina</em> MA2–2. Results showed that a C:N ratio of 15 could increase biomass, lipid content and ARA concentration by a 1.49, 1.50 and 1.99 fold-increase, respectively. After screening experiments, peptone, yeast extract, sodium nitrate (NaNO<sub>3</sub>) and monosodium glutamate (MSG) were selected for closer study using mixture design to determine the optimal combination of nitrogen sources for maximizing ARA concentration. The combination of yeast extract and sodium nitrate was the most effective for producing ARA, resulting in 17.67 ± 0.16 g L<sup>−1</sup> biomass, 32.7 ± 0.02 % lipids, and 39.33 ± 2.10 % ARA content (2270 ± 100.9 mg L<sup>−1</sup> ARA concentration), corresponding to 1.21, 1.90, 1.32 and 3.05 fold-increases, respectively. This study demonstrates that a significant improvement in total lipid accumulation and ARA concentration can be achieved by combining a complex organic nitrogen source with a lower level of inorganic nitrogen in the culture medium.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102049"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Production kinetics and bioactivity study of Aspulvinone pigment from Aspergillus terreus STCP01 for natural colourant applications","authors":"Anugraha Anilkumar Chalakkara, Toji Thomas","doi":"10.1016/j.biteb.2025.102042","DOIUrl":"10.1016/j.biteb.2025.102042","url":null,"abstract":"<div><div>This study details the isolation, optimisation and characterisation of the yellow pigment produced by <em>Aspergillus terreus</em> strain from mangrove soil. Process parameters including fermentation time (24–288 h), pH (4–9), and temperature (25–35 °C), were optimised using response surface modeling coupled with the Box-Behnken experimental design to predict extracellular pigment yield and biomass production. The predicted conditions of an incubation period of 278 h, a pH of 6.4 and a temperature of 30 °C resulted in optimal pigment production (7.59 AU<sub>320</sub>) and biomass (11.119 g/L). The yellow-coloured pigment was extracted using ethyl acetate, and purified chromatographically and identified as Aspulvinone E by UV–Visible spectroscopy, FT-IR, UPLC-Q-ToF-MS, elemental analysis, and NMR data. Stable under varying temperature and pH, aspulvinone E showed notable antioxidant activity and was non-toxic to both brine shrimp nauplii and L929 cell lines. The results suggest aspulvinone E as a stable and safe natural colouring compound with antioxidant potential.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102042"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recycling saline wastewater from fish processing industry to produce protein-rich biomass from a Thraustochytrid strain isolated in the Basque Country","authors":"Iratxe Urreta , Sonia Suárez-Álvarez , Susana Virgel , Itziar Orozko , Marta Aranguren , Miriam Pinto","doi":"10.1016/j.biteb.2024.102016","DOIUrl":"10.1016/j.biteb.2024.102016","url":null,"abstract":"<div><div>This study explored the use of brines from tuna canneries as a nutrients source for the culture of a marine protist isolated from coastal waters of Bizkaia (Basque Country, Spain). The process yielded 5.5 g/L of biomass with 8 % of nitrogen (2.8 g/L protein) in 168 h. Although under control conditions the biomass achieved was 45 % higher, brine provided amino acids, vitamins and phosphate allowing the simplification of the culture medium to glucose, trace metals, water and brine. This reduced the cost of the medium by 90 % saving 40 % of water in the process. These results provided a revalorisation strategy for an industrial wastewater difficult to manage coupled to obtaining a protein-rich biomass.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102016"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shanika Rae Musser , Sri Suhartini , Lynsey Melville
{"title":"Methane from mango industrial waste: Influence of pH and co-anaerobic digestion","authors":"Shanika Rae Musser , Sri Suhartini , Lynsey Melville","doi":"10.1016/j.biteb.2025.102056","DOIUrl":"10.1016/j.biteb.2025.102056","url":null,"abstract":"<div><div>Agro-industries in Indonesia generate significant amounts of mango industrial waste (MIW). This research evaluated the potential of generating methane from Podang and Honey mango seed kernels, peels, and wastewater, which were collected from a dried fruit manufacturer. A biochemical methane potential (BMP) test was performed on the individual MIW components (mono-digestion) and mixtures (co-digestion). The BMP was highest for co-digesting Podang seed kernels and peels at a 1:1 ratio, with an average BMP of 0.112 m<sup>3</sup>/kg VS substrate. This was the only mixture that had synergistic effects. Crude fat and pH were significant in predicting methane output. All reactors were inhibited by pH with an average post-BMP pH of 4.26. This could be attributed to the acidic nature of MIW and accumulation of volatile fatty acids in the reactor. Future research should investigate the co-digestion of MIW with substrates that have higher crude fat content and pH.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102056"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143315832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Microplastics in the environment: Types, sources, and impact on human and aquatic systems","authors":"Arunagiri Ragu Prasath , Chinnappan Sudhakar , Kandasamy Selvam","doi":"10.1016/j.biteb.2025.102055","DOIUrl":"10.1016/j.biteb.2025.102055","url":null,"abstract":"<div><div>Microplastics (MPs) are a persistent and subtle environmental threat that have been linked to aquatic and human health issues. The excessive manufacturing and usage of plastics results in plastic trash disposal, and the plastic degrades into MPs. MPs have a significant influence on human life and aquatic environments, including ingestion and even death. MPs may also offer health hazards to people. The review emphasizes the different origins of MPs and their impacts on aquatic environments, along with the possible dangers to the health of living beings. The discussion encompasses various types of plastics, their sources, and the pathways through which MPs enter humans and aquatic organisms. In this review highlights the critical need for ongoing research into the effects of microplastics (MPs) on both aquatic organisms and human health. As these pollutants become increasingly prevalent in our ecosystems, understanding their biological interactions and potential health implications is essential.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"29 ","pages":"Article 102055"},"PeriodicalIF":0.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The synergy of maize straw cellulose and sugarcane bagasse fibre on the characteristics of bioplastic packaging film","authors":"Gerald Nyerere , Susan Kyokusiima , Resty Nabaterega , Godias Tumusiime , Chrish Kavuma","doi":"10.1016/j.biteb.2024.102007","DOIUrl":"10.1016/j.biteb.2024.102007","url":null,"abstract":"<div><div>This study investigated the effect of cellulose from maize straw and fibre from sugarcane bagasse on the production and characteristics of bioplastic films. Bioplastic films were developed based on varying ratios of cellulose to fibre, including 100:0, 75:25, 50:50, 25:75, and 0:100. The bioplastics' physical, mechanical, biological, thermal, and Fourier Transform Infrared properties were evaluated. The findings depicted a ratio of 75:25 as the best bioplastic film with desirable characteristics for food packaging. This bioplastic (75:25) was slightly moist and had the lowest water absorption (33 %), low moisture content (16 %), lowest water vapour permeability (0.14 g mm/h m<sup>2</sup> mmHg), highest tensile strength (3.8 MPa), and highest soil biodegradability potential. The bioplastic also exhibited good thermal gravimetric properties which are essential if the bioplastic is to be used for packaging food. The study highlights the potential of using agricultural residues to create sustainable packaging material.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"28 ","pages":"Article 102007"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Erman Taer , Apriwandi Apriwandi , Widi Mulia Nasution , Ahmad Fudholi , Nidya Chitraningrum , Rika Taslim
{"title":"Mangosteen peel waste derived Sulfur-Oxygen self-dual-doped hierarchical porous carbon nanofiber for ultrahigh energy of solid-state supercapacitor","authors":"Erman Taer , Apriwandi Apriwandi , Widi Mulia Nasution , Ahmad Fudholi , Nidya Chitraningrum , Rika Taslim","doi":"10.1016/j.biteb.2024.102004","DOIUrl":"10.1016/j.biteb.2024.102004","url":null,"abstract":"<div><div>Herein, an innovative integrated employed dual-gas pyrolysis approach to produce synergistically enriched S and O self-dual-doped carbon nanofibers (SOCAF) for supercapacitor applications. The precursors were sourced mangosteen peel were prepared via N<sub>2</sub>/CO<sub>2</sub>-gas integrated pyrolysis. The SOCAF exhibited a wormhole-like nanofibers, high porosity (962.415m<sup>2</sup>/g), micropore to mesopore ratio of 1:1, and robust S(7.25 %) and O(20.53 %) self-dopants. Subsequently, the optimal electrode, operated within a dual-cylinder system, demonstrated excellent electrochemical performance, achieving a capacitance of 231F/g at 1 A/g, 87 % rate capability, high coulombic efficiency of 98 %, and low resistance of 0.12 Ω. Moreover, the enhanced faradaic effect, with 16 % pseudocapacitance observed at optimized active cell, resulted in a 13.3 Wh/kg energy output at 393 W/kg in the symmetric supercapacitor system. This study underscores a rational approach to explore the promising potential of mangosteen peel as a carbon source for the synthesis of S and O-rich self-doping nanofiber architectures, aiming to optimize advanced energy storage devices.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"28 ","pages":"Article 102004"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dauda Ibrahim , Sara Giarola , Calliope Panoutsou , Rocio Diaz-Chavez , Nilay Shah
{"title":"Modelling and optimisation of low-indirect land used change biomass supply chains","authors":"Dauda Ibrahim , Sara Giarola , Calliope Panoutsou , Rocio Diaz-Chavez , Nilay Shah","doi":"10.1016/j.biteb.2024.102000","DOIUrl":"10.1016/j.biteb.2024.102000","url":null,"abstract":"<div><div>Biofuels derived from biomass feedstocks produced following the implementation of measures that avoid indirect land used change (ILUC) have the potential of reducing dependency on fossil-based fuels without competing with food value chain. This work develops a model- and optimisation-based methodologies that address challenges related to the production of low-ILUC biomass feedstocks. Case studies investigated include planning of Iow-ILUC biomass feedstock production, biomethane production using low-ILUC biomass feedstocks, integrated production of first generation (1G) and second generation (2G) bioethanol using Miscanthus, and production of hydrotreated vegetable oil (HVO) using castor seeds. Analysis of results show that farmers interested in these models are recommended to sell low-ILUC biomass such as soybean, wheat and brassica above the breakeven price to avoid losses. The estimated selling price for the three crops are 362 €/t, 321 €/t and 381 €/t respectively. To meet the demand of 40,000 t/yr of 2G bioethanol in the UK, approximately 17,094 ha of underutilised land is required. Policy makers should consider options to support alternatives such as retrofitting, and inter-cropping to avoid or mitigate ILUC.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"28 ","pages":"Article 102000"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}