Global Change Biology Bioenergy最新文献

{"title":"The H/C Molar Ratio and Its Potential Pitfalls for Determining Biochar's Permanence","authors":"Henrik I. Petersen,&nbsp;Hamed Sanei","doi":"10.1111/gcbb.70049","DOIUrl":"https://doi.org/10.1111/gcbb.70049","url":null,"abstract":"<p>Biochar carbon removal (BCR) is widely recognized as a globally feasible technique for removing CO₂ from the atmosphere and storing carbon in a stable form within the environment. The hydrogen-to-carbon (H/C) molar ratio serves as the primary proxy for classifying biochar into different quality categories and is a key parameter in decay models used to estimate its long-term stability. In the context of climate credit systems that rely on biochar for carbon sequestration, an accurate assessment of biochar's carbon pools and permanence is crucial. The results of this study confirm that the H/C molar ratio is a robust bulk geochemical proxy for biochar carbonization. However, its use as a standalone benchmark for biochar permanence should be approached with caution. To ensure a more comprehensive assessment, the H/C molar ratio should be combined with the random reflectance (R_o) method, which provides spatially resolved insights into the degree of carbonization within a biochar sample. Relying exclusively on a single bulk H/C molar ratio may, in some cases, lead to inaccurate determinations of biochar's carbon storage security. Such limitations could undermine the credibility of climate credit systems that depend on biochar for permanent carbon dioxide removal. Therefore, integrating both H/C ratio and R_o analysis is essential for accurately evaluating biochar stability and its long-term carbon sequestration potential.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing a Diversified Indian Mustard Production System for Energy-Carbon-Cum-Heat Use Efficiency and Sowing Dates Assessment","authors":"Sunil Kumar,&nbsp;Ram Swaroop Meena,&nbsp;Sandeep Kumar,&nbsp;Gourisankar Pradhan,&nbsp;Chetan Kumar Jangir,&nbsp;Shambhunath Ghosh,&nbsp;Himani Punia,&nbsp;Parvender Sheoran,&nbsp;Ramawatar Meena,&nbsp;Md. Afjal Ahmad,&nbsp;Suneel Kumar Goyal,&nbsp;Nazih Y. Rebouh","doi":"10.1111/gcbb.70044","DOIUrl":"https://doi.org/10.1111/gcbb.70044","url":null,"abstract":"&lt;p&gt;The rice (&lt;i&gt;Oryza sativa&lt;/i&gt; L.)–wheat (&lt;i&gt;Triticum aestivum&lt;/i&gt; L.) cropping system faces major challenges such as stagnant yields, high input and energy demands, and increasing soil and air pollution. Indian mustard (&lt;i&gt;Brassica juncea&lt;/i&gt; L.) is a promising crop for diversification within rice-based ecosystems. The objective of this study was to evaluate the effects of different sowing dates and nutrient sources on energy budgeting in diversified Indian mustard and to assess the impact of these nutrient sources on heat-cum-carbon efficiency. The experiment was conducted using a split-plot design (SPD) with three sowing dates—November 17, November 27, and December 07—in the main plots, and eight nutrient sources in the subplots, where the recommended dose of fertilizer was 100 N:50 P&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;:50 K&lt;sub&gt;2&lt;/sub&gt;O:40 S kg ha&lt;sup&gt;−1&lt;/sup&gt;. The results, based on pooled data, indicated that among the sowing dates, November 17 recorded the highest values for several key metrics. These include energy use efficiency (EUE: 3.46, 5.12, and 12.16), energy production (EP: 0.152, 0.41, and 0.56 kg MJ&lt;sup&gt;−1&lt;/sup&gt;), net energy (NE: 29,712, 50,483, and 92,558 MJ ha&lt;sup&gt;−1&lt;/sup&gt;), energy profitability (EPr: 2.46, 2.88, and 6.34), human energy profitability (HEP: 364.82, 412.60, and 777.42), energy output efficiency (EOE: 364.69, 412.49, and 777.18 MJ d&lt;sup&gt;−1&lt;/sup&gt;), carbon output (CO: 815, 2215, and 3030 kg CE ha&lt;sup&gt;−1&lt;/sup&gt;), carbon efficiency (CE: 2.07, 5.59, and 7.66), and carbon sustainability index (CSI: 1.07, 4.59, and 6.66) for seed, stover, and biological yield, respectively, compared to the crops sown on November 27 and December 07. The study also revealed significant increases in heat use efficiency (HUE) on dry matter at 45 and 90 days after sowing (DAS) and on seed, stover, and biological yield (13.3, 8.46, 1.52, 4.16, and 5.69 kg ha&lt;sup&gt;−1&lt;/sup&gt;°C days, respectively). In the subplots, the highest EUE (3.92, 5.10, and 12.1), EP (0.172, 0.408, and 0.58 kg ha&lt;sup&gt;−1&lt;/sup&gt;), and EPr (2.92, 2.86, and 6.78) for seed, stover, and biological yield were observed in the control treatment, outperforming the other nutrient sources on a pooled basis. The highest SE production (8.59, 3.48, and 2.47 MJ kg&lt;sup&gt;−1&lt;/sup&gt;) for seed, stover, and biological yield was recorded with the application of 100% of the recommended dose of fertilizer (RDF) combined with &lt;i&gt;Azotobacter&lt;/i&gt; and phosphorus-solubilizing bacteria (PSB). Furthermore, the highest NE (35,427, 52,203, and 102,370 MJ ha&lt;sup&gt;−1&lt;/sup&gt;), HEP (434.02, 438.67, and 872.68), EOE (448.37, 452.68, and 901.04 MJ d&lt;sup&gt;−1&lt;/sup&gt;), CO (972, 2359, and 3331 kg CE ha&lt;sup&gt;−1&lt;/sup&gt;), CE (2.48, 6.01, and 8.48), CSI (1.48, 5.01, and 7.48), and HUE (1.67, 4.12, and 5.81 kg ha&lt;sup&gt;−1&lt;/sup&gt;°C days) for seed, stover, and biological yield were observed with the application of 75% RDF + 25% nitrogen from pressmud, combined with &lt;i&gt;Azotobacter&lt;/i&gt; and PSB. This study provides a novel framework for optimizing s","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing GHG Emissions Implications of Forest Residue Use for Energy Production","authors":"Kirsten Franzen,&nbsp;Alice Favero,&nbsp;Caleb Milliken,&nbsp;Chris Wade","doi":"10.1111/gcbb.70045","DOIUrl":"https://doi.org/10.1111/gcbb.70045","url":null,"abstract":"<p>As global interest in enhancing energy security, reducing energy costs, and promoting rural economic development grows, the use of forest residues for bioenergy has gained attention. While bioenergy derived from forest residues can help meet power needs and support policy goals, significant uncertainty remains regarding the greenhouse gas (GHG) emissions associated with their production and use. This study aims to explore the key drivers of these uncertainties by reviewing estimates of GHG emissions from forest residue use for energy, as presented in peer-reviewed journals, reports, and gray literature. The findings reveal a wide range of GHG emission outcomes, with some studies suggesting net emissions and others indicating net removals. This uncertainty stems from the complexity of time scales, variety of forest management approaches and feedstock quality, assumptions about alternative scenarios, and varying approaches to emissions accounting. Recognizing that each method has its unique attributes, we propose an ideal framework that integrates multiple approaches to provide a more comprehensive assessment of the potential net GHG outcomes of using forest residues for energy.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dissimilatory Nitrate Reduction to Ammonium (DNRA) and nrfA Gene in Crop Soils: A Meta-Analysis of Cropland Management Effects","authors":"Qiannan Yang,&nbsp;Hu Li,&nbsp;Lingxuan Gong,&nbsp;Xiaolei Zhang,&nbsp;Lili Wang","doi":"10.1111/gcbb.70039","DOIUrl":"https://doi.org/10.1111/gcbb.70039","url":null,"abstract":"<p>Dissimilatory nitrate reduction to ammonium (DNRA) process is an important factor in the removal and retention of nitrogen (N) in cropland soil. However, the effects of cropland management on DNRA rate and <i>nrfA</i> gene abundance are poorly understood on a global scale. A global synthesis based on 29 published papers and 158 observations was conducted to examine the effects of cropland management (including biochar, manure, straw amendment and N fertilization) and identified the controlling factors affecting the DNRA process. We found biochar amendment enhanced DNRA rate by 85%, while manure and straw amendment enhanced DNRA rate by 442% and 160%. Both biochar and straw amendment significantly increased <i>nrfA</i> gene abundance. Biochar significantly increased DNRA rate and <i>nrfA</i> gene abundance in acidic soils in cool climate zones. Manure application increased DNRA rate when N input was low and in coarse-textured Regosols. Similar to biochar and manure amendment, low N application rate under straw amendment increased DNRA rate in acidic and coarse-textured soils. The <i>nrfA</i> gene abundance was increased in cool climate and clay loam-textured soils. Management effects were improved in the long term (&gt; 10 years) experiments. Pearson correlation indicated the crucial roles of alkaline, cool environments and available N in controlling DNRA processes following biochar and straw amendment. Our results also showed the vital roles of alkaline, humid environments and available N controlling the DNRA process under manure amendment and N fertilization. Our study further highlights management practices could enhance N retention through DNRA processes and therefore lower N loss from cropland soil.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental Impacts and the Food vs. Fuel Debate: A Critical Review of Palm Oil as Biodiesel","authors":"Indra Purnama,&nbsp;Anisa Mutamima,&nbsp;Muhammad Aziz,&nbsp;Karna Wijaya,&nbsp;Iffana Dani Maulida,&nbsp;Junaidi Junaidi,&nbsp;Karmila Sari,&nbsp;Irwan Effendi,&nbsp;Isna Rahma Dini","doi":"10.1111/gcbb.70043","DOIUrl":"https://doi.org/10.1111/gcbb.70043","url":null,"abstract":"<p>Palm oil is an efficient feedstock for biodiesel production due to its high oil yield and cost-effectiveness, positioning it as a key component in the global biofuel industry. However, the expansion of oil palm plantations has raised substantial environmental and socio-economic concerns. This review critically assesses the environmental impacts of palm oil biodiesel, including greenhouse gas emissions, deforestation, biodiversity loss, and the degradation of water and soil resources. Additionally, it explores the “food versus fuel” debate, emphasizing how competition for land and resources between biodiesel production and food cultivation affects global food security, particularly in developing nations. What distinguishes this review is its focus on Southeast Asian producer countries, particularly Indonesia and Malaysia, where biodiesel policies and land-use changes intersect with food and environmental systems in unique ways. Unlike previous studies, this article delves into the often-overlooked consequences of peatland conversion, highlighting its role in exacerbating carbon emissions and biodiversity loss. By providing a detailed analysis of the socio-economic trade-offs and sustainability challenges linked to palm oil biodiesel, the review offers insights into the complex interplay between renewable energy, food security, and environmental stewardship. It also evaluates technological innovations and best practices that can mitigate negative impacts. Furthermore, the review critically examines certification initiatives like the roundtable on sustainable palm oil (RSPO) and the indonesian sustainable palm oil (ISPO) and their effectiveness in promoting sustainable practices. By integrating case studies, this article demonstrates practical applications of these principles, offering actionable recommendations for policymakers, industry stakeholders, and researchers in the field.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling Plant Nutrient Acquisition Strategies Alters Projections of Carbon and Nitrogen Dynamics in Bioenergy Agroecosystems","authors":"Stephanie M. Juice,&nbsp;Melannie D. Hartman,&nbsp;Adam C. von Haden,&nbsp;William J. Parton,&nbsp;Edward R. Brzostek","doi":"10.1111/gcbb.70042","DOIUrl":"https://doi.org/10.1111/gcbb.70042","url":null,"abstract":"<p>Plant strategies to acquire nutrients from limited environments help shape ecosystem carbon (C) and nitrogen (N) cycling and response to environmental change. The effects of plant strategies on ecosystem dynamics are largely uncharacterized in bioenergy agroecosystems, where the impacts could determine bioenergy's ability to meet its sustainability goals of storing C and reducing N loss. We used FUN-BioCROP (Fixation and Uptake of Nitrogen-Bioenergy Carbon, Rhizosphere, Organisms and Protection), a plant–microbe interaction model of coupled plant nutrient uptake and soil organic matter decomposition, to simulate the effects of nutrient acquisition strategies on soil microbial activity and ecosystem nutrient cycling in bioenergy feedstocks miscanthus (<i>Miscanthus</i> × <i>giganteus</i>) and sorghum (<i>Sorghum bicolor</i> (L.) Moench). We examined the model's ability to reproduce the relative effects of belowground nutrient uptake on microbial activity using a reanalysis of empirical data showing that miscanthus root exudation provoked a larger soil microbial response than sorghum. From baseline model simulations, we found that the ability of miscanthus to retranslocate N resulted in higher N uptake at a lower C cost than the sorghum/soybean rotation and that soil C and N pools increased under perennial (miscanthus) and decreased under annual (sorghum/soybean) cultivation. The model also predicted that greater root exudation increased soil C accumulation, highlighting the role of roots in forming stable soil C. Overall, the baseline model was unable to reproduce field observations of miscanthus root exudation stimulating microbial activity more than sorghum. To improve the model, we updated the soil microbial parameters in miscanthus to have faster decomposition, a higher C/N ratio, and greater carbon use efficiency. These changes improved the simulated soil microbial response to miscanthus root exudation, supporting the hypothesis that miscanthus soils foster a microbial community that is more responsive to root exudation than that of sorghum.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhizosphere Microbiome Diversity Potentially Supports Robust Nature of Field Pennycress (Thlaspi arvense L.) in Dryland Cropping Systems of Eastern Washington","authors":"Andrew R. Spishakoff,&nbsp;Pubudu Handakumbura,&nbsp;Chaevien Clendinen,&nbsp;Karen A. Sanguinet,&nbsp;Tarah S. Sullivan","doi":"10.1111/gcbb.70036","DOIUrl":"https://doi.org/10.1111/gcbb.70036","url":null,"abstract":"<p>Field pennycress (<i>Thlaspi arvense</i> L.) is an annual in the Brassicaceae family and is currently being developed as an oilseed intermediate crop suitable for renewable biodiesel and jet fuel. It displays many desirable characteristics for this role including cold tolerance, a rapid life cycle, and a seed fatty acid profile conducive to bioenergy generation. These traits make field pennycress favorable for winter oilseed cultivation in the inland Pacific Northwest (iPNW). Simultaneously, intermediate crops are an increasingly recognized component of both agronomic sustainability and soil health management. Intermediate crops enhance soil microbial diversity, which benefits both soil and plant health. To understand the impact of field pennycress on soil microbial diversity, two natural accessions and seven experimental accessions were grown at three sites in Eastern Washington. Aboveground biomass and rhizosphere soil were then collected. Soil genomic DNA was extracted from rhizosphere samples and used to generate an amplicon library for bacterial (16S) and fungal (ITS) rRNA sequences. The resulting libraries were analyzed in QIIME2, which revealed that not only did the <i>fad2</i> deficient line from the Spring32-10 background have significantly increased aboveground biomass production compared to other pennycress genotypes, but also displayed significantly higher β-diversity in the rhizosphere community specifically at the site experiencing the driest conditions. ANCOM analysis showed that multiple sequences similar to beneficial plant and soil health enhancing organisms such as <i>Trichoderma spirale</i>, <i>Pseudomonas</i> spp., and <i>Methylobacterium goesingense</i> were found to be enriched in the microbiome of the <i>fad2</i> Spring32-10 background also at that site. To add additional context to rhizosphere community data, root exudates from two pennycress genotypes were captured in magenta boxes and analyzed using HPLC. Future work will expand our understanding of the mechanisms by which field pennycress creates diversity in the rhizosphere, thus expanding our ability to cultivate this crop in the iPNW.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 6","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Species-Specific Epigenetic Signature Associates With Heat Stress Tolerance in the Perennial Tree Species Populus","authors":"Biruk A. Feyissa,&nbsp;Jun Hyung Lee,&nbsp;Dana Carper,&nbsp;Nancy L. Engle,&nbsp;Timothy J. Tschaplinski,&nbsp;Paul E. Abraham,&nbsp;David J. Weston,&nbsp;Wellington Muchero,&nbsp;Gerald A. Tuskan,&nbsp;Jin-Gui Chen","doi":"10.1111/gcbb.70033","DOIUrl":"https://doi.org/10.1111/gcbb.70033","url":null,"abstract":"<p>Epigenetic regulation in annual plants is recognized as a key component of recurring stress acclimation and adaptation, but reports on perennial tree species are limited. In this study, two contrasting tree species, <i>Populus trichocarpa</i> and <i>Populus deltoides</i>, and an F1 hybrid cross between them showed species-specific epigenetic and physiological responses to heat stress (42°C) following priming (35°C). By analyzing whole-genome methylation, transcriptomics, proteomics, metabolomics, and photosynthesis parameters, we found that <i>P. deltoides</i> expresses specific epigenetic signatures in response to heat, resulting in improved photosynthetic efficiency compared to <i>P. trichocarpa.</i> Conversely, <i>P. trichocarpa</i> displayed stress signaling and defense mechanisms that could not sustain a net assimilation rate despite maintaining higher gas exchange. Heat stress following priming in hybrid plants increased transcript levels of thermotolerance-related transcription factors, such as <i>SPL12.</i> Selected regions in the promoter of <i>SPL12</i> showed differential methylation between direct heat stress and priming followed by heat stress. As a result, upregulation of downstream genes and associated increases in protein and metabolite abundance for stress adaptation were exhibited. Consequently, hybrid plants showed enhanced photosynthesis and gas exchange rates, a trait lacking in <i>P. trichocarpa</i>. These results imply that priming may not be universally effective in enhancing plant performance under stress, particularly in perennial tree species. However, priming can acclimate the perennial tree species <i>P. deltoides</i> to withstand elevated temperature stress better. Our study has demonstrated that priming-based stress adaptation is species-specific but can be attained through crossbreeding, indicating its potential use in breeding programs.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 5","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategies for Biomethane Purification: A Critical Review and New Approaches","authors":"Lolo Errol Molatudi,&nbsp;Thokozani Justin Kunene,&nbsp;Tebogo Mashifana","doi":"10.1111/gcbb.70040","DOIUrl":"https://doi.org/10.1111/gcbb.70040","url":null,"abstract":"<p>The global shift towards clean energy emphasizes waste valorization as a key to achieving sustainable development goals. Biomethane production from organic waste not only converts waste to energy but also reduces greenhouse gas emissions. The growth trajectory of sustainability and environmental protection highlights the significance of energy valorization in anaerobic digestion to produce biomethane and digestate. A 2019 UN report noted that 17% of global food production, equating to 1.0 billion tons, became waste, with major contributions from food waste (61%), households (26%), and food services (13%). The value derived from biomethane, carbon dioxide, nitrogen, ammonia, and manure underscores the need for economically sustainable valorization pathways to attract investment and ensure market viability. Research into purifying biogas for diverse applications has advanced, with technologies such as membranes, genetic manipulation, and metabolic engineering showing potential for improving biogas conversion. Enhanced membrane technologies promise improved biogas quality and efficiency. This review focuses on developing a microscale biogas purification plant and examining processes such as amine scrubbing, absorption, adsorption, and membrane separation as promising methods.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 5","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategy for Sustainable Bio-Value Chain Development: Algal Biomass Utilization Without Inhibitory Effects on Lactic Acid Production via Efficient Diluted Acid Hydrolysis of Brown Macroalga","authors":"Jihyun Bae,&nbsp;Jeongho Lee,&nbsp;Hyeok Ki Kwon,&nbsp;Giwon Lee,&nbsp;Taek Lee,&nbsp;Hyun Gyu Lim,&nbsp;Sang Woo Seo,&nbsp;Gyoo Yeol Jung,&nbsp;Hah Young Yoo,&nbsp;Chulhwan Park","doi":"10.1111/gcbb.70038","DOIUrl":"https://doi.org/10.1111/gcbb.70038","url":null,"abstract":"<p><i>Saccharina japonica</i>, one of the most widely cultivated brown algae species, is considered a promising biorefinery feedstock due to its high carbohydrate content. Dilute acid hydrolysis can be performed to recover sugars from <i>S. japonica</i>; however, the impact of sugar derivatives (potential inhibitors) generated during the hydrolysis process on lactic acid production remains unexplored. In this study, the inhibitory effects of sugar derivatives on the fermentation performance of <i>Lacticaseibacillus rhamnosus</i> were systematically examined to enhance the bioconversion efficiency of <i>S. japonica</i>. Firstly, the sugar derivatives present in <i>S. japonica</i> hydrolysate were identified, revealing the presence of acetic acid, formic acid, and furfural. Subsequently, their inhibitory effects on lactic acid production were assessed, demonstrating significant inhibition (<i>p</i> &lt; 0.05) at the following concentrations: &gt; 2 g/L acetic acid, &gt; 0.5 g/L formic acid, and &gt; 1 g/L furfural. Based on the information, 5% H₂SO₄ was determined to be the optimal solvent for <i>S. japonica</i> hydrolysis, enabling the production of hydrolysate with high fermentable sugar content and minimal sugar derivatives: 23.23 g/L mannitol, 0.86 g/L glucose, 0.21 g/L acetic acid, 0.14 g/L formic acid, and no detectable furfural. The resulting <i>S. japonica</i> hydrolysate contained sugar derivatives at non-inhibitory levels, allowing for direct application to fermentation without detoxification. As a result, lactic acid production and yield were determined to be 18.26 g/L and 92.3%, respectively, comparable to the control group (17.32 g/L and 87.6%). This study addresses a critical knowledge gap in the bioconversion of macroalgae to lactic acid by elucidating the effects of sugar derivatives on fermentation performance.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"17 5","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}