Bioresource Technology Reports最新文献

{"title":"Comparative analysis of H2 production and microbial communities during dark fermentation of food waste under varying temperature and cultivation modes","authors":"Geunhee Kim ,&nbsp;Kyung-Suk Cho","doi":"10.1016/j.biteb.2025.102279","DOIUrl":"10.1016/j.biteb.2025.102279","url":null,"abstract":"<div><div>This study conducted a comparative analysis of hydrogen (H₂) production and bacterial community dynamics from food waste as a substrate under mesophilic (37 °C) and thermophilic (50 °C) conditions using batch and fed-batch cultivation. The modified Gompertz model was used to evaluate H₂ production characteristics, and bacterial metagenomic analysis was conducted to assess bacterial community dynamics under different cultivation conditions. In batch cultures, thermophilic conditions exhibited superior H₂ production potential (P) and maximum production rate (R_m) compared to mesophilic conditions. Notably, the thermophilic second batch culture achieved the highest P value of 775 mL·L⁻¹ and an R_m of 99 mL·L⁻¹·h⁻¹. Bacterial community analysis revealed that <em>Clostridium</em> was the dominant H₂ producer under mesophilic conditions, whereas thermophilic conditions supported a more diverse bacterial consortium, including <em>Clostridium</em>, <em>Caldibacillus</em>, <em>Caproicibacter</em>, and <em>Caproiciproducens</em>. This shift in dominant bacteria led to higher H₂ production compared to mesophilic conditions. Similarly, in fed-batch cultivation, thermophilic conditions outperformed mesophilic conditions in H₂ production. This enhancement is attributed to higher bacterial diversity and effective mitigation of inhibitory effects caused by substrate accumulation and byproducts in fed-batch systems. These findings contribute to advancing sustainable energy production systems from food waste and provide insights into optimizing dark fermentation processes. Future research should focus on refining substrate feeding strategies, improving reactor designs, and further exploring the relationship between bacterial community dynamics and H₂ production efficiency.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102279"},"PeriodicalIF":0.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004162","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":"Hydrogen production from spent coffee grounds in alkaline conditions using NiFe/Al2O3 as a catalyst","authors":"Tan Phat Vo ,&nbsp;Hyeon Seok Kim ,&nbsp;Kwangbum Kim ,&nbsp;Wonhyeong Lee ,&nbsp;Nadia Delfi Zafira ,&nbsp;Dinh Quan Nguyen ,&nbsp;Jae W. Lee","doi":"10.1016/j.biteb.2025.102271","DOIUrl":"10.1016/j.biteb.2025.102271","url":null,"abstract":"<div><div>This study explores an innovative approach to sustainable hydrogen production from spent coffee grounds (SCG) via alkaline thermal treatment (ATT) utilizing Ni<img>Fe/Al₂O₃ as a catalyst. A series of single-factor experiments were conducted to examine the impact of key ATT parameters on hydrogen and methane yields. Subsequently, process optimization was achieved using a Box-Behnken Design (BBD) model. The optimal operational conditions were 600 °C, a sodium hydroxide concentration (SHC) of 33 %, a sodium hydroxide solution volume to SCG mass (RSSC) ratio of 4 mL/g, and a catalyst to biomass (RCB) ratio of 0.23:1 g/g. Hydrogen and methane yields of 19.27 and 2.31 mmol/g were obtained upon this condition and were experimentally confirmed. The fresh and spent Ni<img>Fe/Al₂O₃ were characterized using Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), temperature programmed reduction (H₂-TPR), and field emission scanning electron microscopy (FE-SEM). The XRD results of NaOH-solution treated SCG revealed a transition from a crystalline structure to a more amorphous structure, which facilitates the scission of hydrocarbon chains and enhances hydrogen release. In addition, the presence of Ni in Fe-based catalysts enhances the cracking of hydrocarbon chain and thus hydrogen production. The elucidation of enhanced hydrogen generation through nickel incorporation into the catalyst and NaOH solution treatment provide valuable insights into a viable route for producing hydrogen from SCG.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102271"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913344","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":"Earthworm-assisted constructed wetlands: A multidisciplinary investigation of organic matter and nitrogen removal using hydrodynamic, metagenomic, and water quality approaches","authors":"Alexandre Lacou ,&nbsp;Marion Alliet ,&nbsp;Edoardo Parisi ,&nbsp;Sophie Canovas ,&nbsp;Claire Albasi ,&nbsp;Magali Gerino","doi":"10.1016/j.biteb.2025.102269","DOIUrl":"10.1016/j.biteb.2025.102269","url":null,"abstract":"<div><div>Earthworm (EW) soil-based filtration technologies offer a promising solution for decentralized wastewater (WW) treatment in urban areas. This study examined the effects of inoculating three Lumbricidae species (<em>Eisenia fetida</em>, <em>Eisenia andrei</em>, and <em>Dendrobaena hortensis</em>) on hydrodynamics, microbial communities, and purification performance in EW-assisted constructed wetlands (CWs). Conducted on mesocosm-scale systems (0.2 m² units) treating raw campus effluent, the experiment showed that EW inoculation slightly delayed the reduction of hydraulic conductivity over time without inducing short-circuiting, thereby preserving and slightly increasing mean hydraulic residence time. Organic matter and nitrogen removal remained comparable to controls. A 65 % increase in bacterial gene abundance was observed in EW-assisted CW substrates, without contributing to further bioclogging. Metagenomic analysis of interstitial biofilms revealed increases in the relative and absolute abundances of traits associated with the degradation of complex, recalcitrant organic molecules, but no significant changes in nitrogen-related processes. Traits related to recalcitrant organic molecules degradation represented only 3–6 % of all organic matter removal functions considered, consistent with the absence of significant differences in bulk organic matter removal. Overall, hydraulic, microbial, and water quality observations were consistent with each other, however the absence of a measurable effect of EW inoculation on overall treatment performance under the tested conditions limits mechanistic interpretation. The same integrative approach should be applied under different, potentially more favorable operational conditions to better reveal EW-driven effects (<em>e.g.</em> longer-term monitoring, higher organic loading to induce more severe clogging, alternative substrate types) and disentangle the respective contributions of hydraulic and microbial processes.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102269"},"PeriodicalIF":0.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913343","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":"Development and performance assessment of in-vessel home composters for food waste valorization","authors":"Acharan Jain,&nbsp;Deval Jugraj Singh,&nbsp;Anil Kumar Dikshit","doi":"10.1016/j.biteb.2025.102265","DOIUrl":"10.1016/j.biteb.2025.102265","url":null,"abstract":"<div><div>Globally, organic food waste (OFW) from residential households forms a major portion of the municipal solid waste. Decentralized composting has emerged as a promising clean-tech solution for OFW management. This study aims to evaluate batch-scale feasibility of in-vessel home composter specifically tailored with compact and modular design for urban households to address issues related to space, odor, and operational challenges. The research methodology was structured in two phases: (a) development of in-vessel composter based on a critical review and on-ground surveys, (b) conduct batch-scale study (45 cycles) to evaluate performance assessment of proposed in-vessel composter under varying operational conditions. It was found that the total organic matter (55 %), pH (8), carbon-to‑nitrogen ratio (12) and germination index (GI) (85 %) of the compost quality was rich in nutrients and soil-conditioning properties. Further, this study also focused on investigating the impact of different bulking agents (dried leaves, cardboard, wheat straw, newspaper, and shredded tires) on the compost quality. It also examined the influence of aeration and turning mechanisms on the composting cycle. Among all the bulking agents tested, wheat straw demonstrated the most effective performance in enhancing compost quality. It showed pH of 7.72, total organic matter of 47 %, GI of 92.8 %, and humic acid to fulvic acid (HA/FA) ratio of 6.57. Compared to other bulking agents, the GI and HA/FA ratio in wheat straw-based compost were 15–20 % higher. In terms of future applicability, the nutrient-rich compost produced from in-vessel composter can be effectively reused as organic manure for community-level gardening, landscaping and soil restoration initiatives.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102265"},"PeriodicalIF":0.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913356","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":"Production of cellulose nanocrystals from the residual mass of P. chaba stem after methanol extraction as potential reinforcement in sustainable nanocomposite manufacturing: A cutting-edge approach in waste management","authors":"Md. Elius Hosen Pk ,&nbsp;Md. Mahmudur Rahman ,&nbsp;Bijoy Chandra Ghos ,&nbsp;Nazim Uddin Ahmed ,&nbsp;Md. Nakib Hossen ,&nbsp;Salah Knani ,&nbsp;M. Safiur Rahman ,&nbsp;Md. Ismail Hossain","doi":"10.1016/j.biteb.2025.102273","DOIUrl":"10.1016/j.biteb.2025.102273","url":null,"abstract":"<div><div>The sustainable utilization of agro-waste biomass has gained significant attention in recent years, particularly for producing high-value nanomaterials. In this research, cellulose nanocrystal (CNCs) was effectively isolated from the residual mass of <em>Piper chaba</em> plant stem after methanol extraction through a sequential physicochemical approach. The residual mass was chosen to facilitate solid waste management by reducing secondary pollution and to develop a new source of CNCs, which can be beneficial in a zero-waste strategy. However, to verify the scope, contribution, novelty, significance, selectivity, and applicability of the newly produced CNCs, several state-of-the-art techniques were conducted like Fourier transform infrared (FTIR), X-ray diffraction (XRD), Thermal analysis (TGA/DSC), UV–vis-NIR spectroscopy, Field emission-scanning electron microscopy (FE-SEM), Transmission electron microscopy (STEM), Dynamic light scattering (DLS), and zeta potential (ZP) analysis. The FTIR spectra indicated the gradual elimination of non-cellulosic constituents, XRD demonstrated a notable increase in crystallinity, confirming the effectiveness of the purification process. The TGA/DSC indicated enhanced thermal stability. FESEM and STEM have revealed a well-decorated 2D mesoporous honeycomb-like surface microstructure with road road-like shape and a nanoscale dimension of approximately 100nm. DLS and zeta potential analyses confirmed a high negative surface charge (−12.5mV), ensuring colloidal stability. These enhanced physicochemical properties make the CNCs a highly promising candidate as reinforcement to produce environmentally friendly polyfunctional bionanocomposites. This innovative approach highlights the potential of underutilized residual mass as a beneficial source for high-performance nanocellulose and to reduce secondary pollution. Offering a green and cost-effective solution for advanced material production, application, and zero waste technology.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102273"},"PeriodicalIF":0.0,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913355","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":"Parametric analysis of poly(3-hydroxybutyrate) (P3HB) biodegradable plastic extraction from simulated biomass using black soldier fly larvae","authors":"Alexander Sydney De Leon ,&nbsp;Jaren U. Tulipan ,&nbsp;Myra G. Borines ,&nbsp;Jey-R S. Ventura","doi":"10.1016/j.biteb.2025.102268","DOIUrl":"10.1016/j.biteb.2025.102268","url":null,"abstract":"<div><div>Polyhydroxyalkanoates (PHAs), like poly(3-hydroxybutyrate) (P3HB), are biodegradable, non-toxic polymers offering a sustainable plastic alternative. To avoid solvent use in PHA recovery, this study explored bioextraction using black soldier fly larvae (BSFL), known for nutrient recycling. BSFLs were fed with alginate-entrapped P3HB for two days. P3HB was excreted along with feces, then purified and analyzed. The effects of biomass-to-BSFL ratio, starvation, and feeding time on PHA purity and yield were evaluated. Results showed that 93.75 % purity (<em>w</em>/w) was achieved at a 42.52 % yield, while a 60.78 % yield corresponded to 80.50 % purity. This inverse relationship suggests trade-offs between yield and purity. The study demonstrates the potential of BSFL as a bioextraction agent and highlights the need for further optimization using real PHA-rich biomass.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102268"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917874","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":"Integrated carbon footprint accounting for coffee: A new perspective on low-carbon and sustainable living","authors":"Zichen Li ,&nbsp;Xia Li ,&nbsp;Qian Jia ,&nbsp;Fengting Li","doi":"10.1016/j.biteb.2025.102248","DOIUrl":"10.1016/j.biteb.2025.102248","url":null,"abstract":"<div><div>Coffee is a beverage with a long history and is still widely popular. In China, the coffee industry is experiencing vigorous development and the greenhouse gas emissions of the coffee industry cannot be ignored. This study takes a 300 mL cup of coffee as the functional unit and established the life cycle model, including the carbon emissions of farming, processing, transportation, consumption and treatment stage. The results show that the carbon emissions of a Latte (0.967 kg CO₂e) are higher than those of an Americano (0.878 kg CO₂e). The carbon emissions of milk account for 75.45 % of those of a Latte, while ultrafiltration water is the main contributor to carbon emissions of an Americano (0.298 kg CO₂e, 34.01 %). Secondly, the use of fertilizers during the farming stage accounts for 25.48 % to 28.04 % of the carbon emissions. In addition, solutions were provided for the coffee industry in China to reduce carbon emission.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102248"},"PeriodicalIF":0.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913342","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":"Agro-industrial waste valorization through solid-state fermentation by Lentinula edodes for high-protein and β-glucans flour development for human diet: Chemical characterization, drying kinetics evaluation, and bioaccessibility","authors":"Thaynã Gonçalves Timm ,&nbsp;William Ferreira Weise ,&nbsp;Matheus Samponi Tucunduva Arantes ,&nbsp;Dayanne Regina Mendes Andrade ,&nbsp;Suelen Ávila ,&nbsp;Edson Alves de Lima ,&nbsp;Cristiane Vieira Helm ,&nbsp;Lorena Benathar Ballod Tavares","doi":"10.1016/j.biteb.2025.102254","DOIUrl":"10.1016/j.biteb.2025.102254","url":null,"abstract":"<div><div>This study aimed to develop a high-protein and β-glucans flour for the human diet through the solid-state fermentation of peach palm shells by <em>Lentinula edodes</em>. Six biomasses were produced to analyze the effects of cultivation substrate on the physicochemical properties, using soya bran, cassava bagasse, and sorghum flour as supplements. The biomasses that presented the highest protein and β-glucans content were analyzed to obtain the drying kinetics behavior and the <em>in vitro</em> digestibility. Two flours presented the highest protein content (28.32 g 100 g⁻¹) and the highest β-glucans content (9.44 g 100 g⁻¹), high minerals and dietary fiber content and low lipid content, and high bioaccessibility of protein (23.72–25.17 %) and bioactive compounds (76.69–77.66 mg EAG/100 g). Therefore, it is possible to obtain high-quality flours for human consumption through a biotechnological process, being a source of nutrients and bioactive compounds, helping to reduce the negative environmental impacts generated in the heart of palm industrialization, promoting the circular bioeconomy and supporting the UN's sustainable development goals.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102254"},"PeriodicalIF":0.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886265","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 influence of biochar pyrolysis temperature on anaerobic digestion of chicken litter in a leach bed coupled to a biochar filter","authors":"Ben A. Collins ,&nbsp;Cristian H. Birzer ,&nbsp;Stephen P. Kidd ,&nbsp;Tony Hall ,&nbsp;Paul R. Medwell","doi":"10.1016/j.biteb.2025.102219","DOIUrl":"10.1016/j.biteb.2025.102219","url":null,"abstract":"<div><div>Recent studies have shown that a dry anaerobic digestion system known as a leach bed reactor (LBR) is suitable for processing chicken litter — an abundant and problematic waste from broiler farming — and that biochar can enhance the process. The influence of biochar addition in anaerobic digestion technologies varies depending on biochar properties. This study considers the influence of wood biochar produced at different pyrolysis temperatures (450 to 900 °C) on anaerobic digestion of chicken litter in an LBR coupled to a biochar-packed anaerobic filter. The pyrolysis temperature of biochar applied as filter media did not significantly influence methane production rate and yield. However, hydrogen sulfide yield declined with decreasing biochar pyrolysis temperature. Application of 450 °C biochar reduced hydrogen sulfide yield by 30, 36 and 53% compared to biochars produced at 600, 750 and 900 °C, respectively. The presence of organic surface functional groups and capability to form liquid films on the surface of biochar are likely more important than surface area for enhancing hydrogen sulfide reduction.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102219"},"PeriodicalIF":0.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895579","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":"Rice husk-based catalyst for sustainable biodiesel production: A meta-analysis and systematic review","authors":"Meka Saima Perdani ,&nbsp;Dita Ariyanti ,&nbsp;Eko Lela Fitriana ,&nbsp;Dwini Normayulisa Putri ,&nbsp;Heri Hermansyah","doi":"10.1016/j.biteb.2025.102264","DOIUrl":"10.1016/j.biteb.2025.102264","url":null,"abstract":"<div><div>Biodiesel continues to attract attention as a sustainable alternative to fossil fuels. This review focuses on the utilization of rice husk, an abundant agro-industrial waste as a heterogeneous catalyst for biodiesel synthesis. Critical process parameters including reaction temperature, calcination temperature, type of catalyst, agro-industrial waste type, biomass amount and surface area were systematically reviewed using the PRISMA method and statistically evaluated through PROC MIXED. Results show that rice husk-derived metal oxide catalyst achieved higher biodiesel yields (85.4 %) compared to organic composites catalyst (78.2 %). Optimization results further indicated an average conversion rate of 92.3 % under ideal conditions: 65 °C reaction temperature, 1.5 h reaction time and 3 wt% catalyst concentration. A statistically significant correlation was observed between catalyst type and biodiesel yield (<em>p</em> &lt; 0.01). This review highlights the potential of rice husk-derived catalysts to enhance biodiesel production through waste valorization.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"31 ","pages":"Article 102264"},"PeriodicalIF":0.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863508","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}