Biomass & Bioenergy最新文献_第8页

Enhancing the performance of woody bio-oil alkaline fuel cells through efficient extraction of redox-active components 通过有效提取氧化还原活性成分来提高木质生物油碱性燃料电池的性能

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-28 DOI: 10.1016/j.biombioe.2026.109162

Xueyan Shang , Xueyong Ren , Ying Li , Changxia Sun , Bowei Wang , Yi Wu , Yao Guo , Qiang Li

Woody bio-oil represents a promising renewable fuel for alkaline fuel cells (AFCs); however, its direct electrochemical utilization is fundamentally constrained by the low intrinsic electroactivity of crude bio-oil arising from its compositional complexity and limited abundance of redox-active species. In this work, a targeted solvent-extraction strategy is developed to selectively enrich electroactive components from woody bio-oil, thereby enabling the functional upgrading of biomass-derived liquids toward electrochemical energy conversion. Among the solvents evaluated, ethyl acetate exhibits a pronounced selectivity for alcohols, sugars, and phenolic compounds, establishing a quantitative correlation between bio-oil composition and AFC discharge performance. Under optimized extraction and operating conditions, the resulting AFC with 6 mL bio-oil as fuel achieves a maximum current output of 12.15 mA with a sustained discharge duration of 24.27 h. Comparative GC–MS analyses conducted before and after AFC operation confirm that alcohols, sugars, and phenolic derivatives constitute the dominant contributors to anodic electro-oxidation under alkaline conditions, providing mechanistic insight into bio-oil electrochemical conversion. Collectively, this study advances an integrated strategy combining selective component enrichment and electrochemical optimization, and demonstrates the potential of lignocellulosic bio-oil as a functional electrochemical energy carrier for high-value biomass valorization.

木质生物油是一种很有前途的碱性燃料电池（AFCs）可再生燃料。然而，由于生物原油的成分复杂和氧化还原活性物质的丰度有限，其固有电活性较低，从根本上限制了生物原油的直接电化学利用。在这项工作中，开发了一种靶向溶剂萃取策略，以选择性地富集木质生物油中的电活性成分，从而实现生物质衍生液体向电化学能量转换的功能升级。在被评估的溶剂中，乙酸乙酯对醇、糖和酚类化合物表现出明显的选择性，建立了生物油组成与AFC放电性能之间的定量相关性。在优化的提取和操作条件下，以6 mL生物油为燃料的AFC的最大电流输出为12.15 mA，持续放电时间为24.27 h。在AFC操作前后进行的对比GC-MS分析证实，在碱性条件下，醇类、糖类和酚类衍生物是阳极电氧化的主要因素，为生物油的电化学转化提供了机制。总之，本研究提出了一种结合选择性组分富集和电化学优化的综合策略，并证明了木质纤维素生物油作为高价值生物质增值的功能性电化学能量载体的潜力。

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引用次数: 0

Hydrogen-enriched nano-enhanced waste plastic pyrolysis oil blends: Combustion, emission, and machine learning-based optimization in a dual-fuel diesel engine 富氢纳米增强废塑料热解油混合物：双燃料柴油发动机的燃烧、排放和基于机器学习的优化

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-27 DOI: 10.1016/j.biombioe.2026.109144

Zhenzhen Cui , Xiaoliang Cheng , Jie Wei , Xiaowei Yang

This study investigates the combustion, performance, and emission characteristics of a hydrogen-enriched dual fuel engine operated with a nano-enhanced ternary fuel blend (diesel/waste-plastic-driven pyrolysis oil/diethyl ether). Experiments were conducted at a fixed engine speed of 1500 rpm, with a load variation ranging from 20% to 100%, a constant hydrogen flow rate of 3 LPM, and an Al₂O₃ nanoparticle concentration varying from 25 to 100 ppm. The nano-enhanced blends showed improved combustion and thermal efficiency compared to baseline blends (Diesel + H₂) operation. Under full load operating conditions, the P20DEE5NP100+H2 blend achieved an 11.5% improvement in brake thermal efficiency (BTE), while carbon monoxide (CO) and hydrocarbon (HC) emissions decreased by 49 % and 29 %, respectively, compared to the baseline blend. However, enhanced combustion intensity led to increased NOx emissions, indicating a trade-off between efficiency and NOx formation. Combustion analysis showed 5% high peak cylinder pressure and an advanced heat release rate with nanoparticle dispersion, which suggests reduced ignition delay and improved premixed combustion. To support experiments, five different supervised machine learning (ML) models were developed for multi-output prediction. The Extra Tree (ET) and Gradient Boosting (GB) models exhibited superior predictive capability, attaining normalized performance scores of 1.00 and 0.96, respectively. Multi-objective optimization using a desirability-based approach identified an optimal operating condition at 62.45% load with 100 ppm nanoparticle dispersion, yielding a composite desirability of 0.651 and a prediction error within ±3.1%. These findings show the potential of integrating waste-driven fuels, hydrogen enrichment, and data-driven modeling for sustainable engine operation.

本研究研究了使用纳米增强三元燃料混合物（柴油/废塑料驱动的热解油/乙醚）运行的富氢双燃料发动机的燃烧、性能和排放特性。实验在发动机转速为1500转/分，负载变化范围为20% ~ 100%，氢气流量恒定为3 LPM， Al2O3纳米颗粒浓度为25 ~ 100 ppm的条件下进行。与基准混合物（柴油+ H2）相比，纳米增强混合物的燃烧和热效率有所提高。在满载工况下，P20DEE5NP100+H2混合燃料的制动热效率（BTE）提高了11.5%，而一氧化碳（CO）和碳氢化合物（HC）的排放量分别比基准混合燃料降低了49%和29%。然而，增强的燃烧强度导致NOx排放增加，表明效率和NOx生成之间的权衡。燃烧分析结果表明，纳米颗粒分散后，其峰值缸压达到5%，热释放速度加快，减少了点火延迟，改善了预混燃烧。为了支持实验，开发了五种不同的监督机器学习（ML）模型用于多输出预测。Extra Tree （ET）和Gradient Boosting （GB）模型表现出较好的预测能力，分别达到1.00和0.96的归一化性能得分。采用基于期望度的多目标优化方法确定了负载为62.45%、纳米颗粒分散度为100 ppm时的最佳操作条件，复合期望度为0.651，预测误差在±3.1%以内。这些发现表明，将废物驱动燃料、氢浓缩和数据驱动建模相结合，可以实现发动机的可持续运行。

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引用次数: 0

A prospective analysis of Nigeria's energy system: Bridging energy poverty and environmental goals 尼日利亚能源系统的前瞻性分析：弥合能源贫困和环境目标

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-26 DOI: 10.1016/j.biombioe.2026.109146

Olasunkanmi Opeoluwa Adeoye, Electo Eduardo Silva Lora, Rubenildo Vieira Andrade, Osvaldo Jose Venturini, Leonardo Peña Pupo, René Lesme Jaén

This study examines Nigeria's energy system transformation from 2025 to 2060 using the LEAP (Low Emissions Analysis Platform) model. Unlike many analyses that base projections solely on fixed capacity expansion targets, it integrates both a proposed expansion plan and demand-driven capacity growth to align electricity generation with multi-sector energy use, population growth, and economic development. Three scenarios were evaluated: a Business as Usual (BAU) trajectory, a Gas Transition Economy (GTE), and an Ambitious Green Transition (AGT). The BAU scenario has the highest total emissions by 2060, at 783.4 MtCO₂e, followed by GTE at 766.1 MtCO₂e. In contrast, the AGT scenario, driven by large-scale electrification and renewable energy, presents the most sustainable pathway, reducing total emissions to 493.5 MtCO₂e. Notably, the AGT pathway also delivers the greatest developmental benefits. Despite having the lowest final energy demand (3991.4 PJ), it achieves the highest per capita electricity access, reaching 2.86 kWh/day by 2060. This is a direct result of strategic electrification and efficiency gains that decouple human development from raw energy consumption. A key conclusion of this study is that Nigeria's path to a low-carbon, inclusive future lies in prioritizing strategic electrification and aggressive renewable energy targets, which are proven to reduce emissions while simultaneously improving energy access for its citizens.

本研究使用LEAP（低排放分析平台）模型考察了尼日利亚从2025年到2060年的能源系统转型。与许多仅基于固定产能扩张目标进行预测的分析不同，它将拟议的扩张计划和需求驱动的产能增长结合起来，使发电与多部门能源使用、人口增长和经济发展保持一致。我们评估了三种情景：“一切照旧”（BAU）轨迹、“天然气转型经济”（GTE）和“雄心勃勃的绿色转型”（AGT）。到2060年，BAU情景的总排放量最高，为7.834亿吨二氧化碳当量，其次是GTE，为7.661亿吨二氧化碳当量。相比之下，由大规模电气化和可再生能源驱动的AGT情景呈现出最可持续的途径，将总排放量减少到4.935亿吨二氧化碳当量。值得注意的是，AGT通路也提供了最大的发育益处。尽管最终能源需求最低（3991.4 PJ），但其人均电力接入最高，到2060年达到2.86千瓦时/天。这是战略电气化和效率提高的直接结果，将人类发展与原始能源消耗脱钩。这项研究的一个关键结论是，尼日利亚通往低碳、包容性未来的道路在于优先考虑战略性电气化和积极的可再生能源目标，这些目标已被证明可以减少排放，同时改善其公民的能源获取。

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引用次数: 0

Biomass-inherent nitrogen doping in utilized chopsticks carbon for alkaline electrolysis 生物质固有氮掺杂在碱法电解用筷子炭中的研究

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-03-05 DOI: 10.1016/j.biombioe.2026.109233

PratimaDevi Sivasubramanian , Yen-Ping Peng , Po-Hsun Lin , Subramanian Sakthinathan , Te-Wei Chiu , Ching-Lung Chen

As the requirement for the generation of green hydrogen enhances, there is a critical necessity for electrocatalysts which are inexpensive, and resource efficient. In this research, we present a facile and chemically unmodified technique to transform utilized chopsticks doped with urea, overabundant single-use biogenic waste, into biochar for water splitting reactions. The biochar was prepared through straightforward pyrolysis devoid of reagent activation or doping of metals, affirming a minimalist and sustainable approach. The chopsticks derived biochar displayed notable dual functional electrocatalytic performance, attaining an overpotential of 333 mV for hydrogen evolution reaction (HER) and 351 mV for oxygen evolution reaction (OER), in an alkaline media at 10 mA cm⁻². Further, the catalyst delineated stable activity over prolonged electrolysis, accentuating the robustness and the feasibility of biochar for real-time applications. The improved catalytic performance is attributed to the nitrogen species, from urea, that modulate the electronic, structure, create abundant active sites, and accelerate interfacial charge transfer. This research introduces an unexplored route to untreated biochar from post-consumer chopsticks that could directly serve as a promising and renewable electrocatalyst for both HER and OER, independent on expensive materials or complex preparation procedures. With the exploitation of single-use biomass residue via an extensible approach, this study provides to solid waste utilization and evolution of off-grid hydrogen energy systems.

随着对绿色氢生产要求的提高，对价格低廉、资源高效的电催化剂的需求日益迫切。在这项研究中，我们提出了一种简单且未经化学修饰的技术，将含有尿素的废旧筷子转化为生物炭，用于水分解反应。生物炭是通过直接热解制备的，没有试剂激活或掺杂金属，肯定了一种极简和可持续的方法。筷炭具有显著的双功能电催化性能，在10 mA cm−2的碱性介质中，析氢反应（HER）和析氧反应（OER）的过电位分别为333 mV和351 mV。此外，该催化剂在长时间电解过程中表现出稳定的活性，强调了生物炭在实时应用中的鲁棒性和可行性。催化性能的提高是由于尿素中的氮调节了电子结构，产生了丰富的活性位点，加速了界面电荷转移。这项研究介绍了一种未经探索的途径，从消费后的筷子中提取未经处理的生物炭，可以直接作为一种有前途的可再生电催化剂，用于HER和OER，不需要昂贵的材料或复杂的制备程序。通过可扩展的方法开发一次性生物质残渣，本研究为固体废物利用和离网氢能系统的发展提供了依据。

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引用次数: 0

Investigation into the transformation mechanisms of heavy metals and phosphorus and their bioavailability during sheep manure composting under functional membrane coverage on Qinghai-Tibet Plateau 青藏高原功能膜覆盖下羊粪堆肥重金属、磷转化机制及其生物有效性研究

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-03-04 DOI: 10.1016/j.biombioe.2026.109218

Rui Cai , Rongrong Li

The application of functional membrane-covered composting (FMC) technology can enhance the humification efficiency of composting. However, the application of this technology on Qinghai-Tibet Plateau (QTP) still requires further enhancement. Furthermore, research on the potential mechanisms underlying the transformation of heavy metals and phosphorus in composting under this technology remains highly limited. This study explored the effects of FMC on the transformation and bioavailability of heavy metals and phosphorus of sheep manure composting on QTP, as well as its underlying mechanisms. Results indicated that FMC elevated the compost temperature by 10.7 °C, while simultaneously enhancing humic acid content and the germination index by 17.9% and 13.8%, respectively. FMC increased the proportions of residual Pb, Mn, Zn, and Cr in sheep manure compost by 23.6%, 11.1%, 9.2%, and 8.0%, respectively, and enhanced the labile phosphorus concentration by 19.2%. Through plant cultivation experiments, it was observed that FMC inhibited the uptake of Pb, Cr, Zn, and As by corn seedlings while promoting an increase in phosphorus concentration. The speciation of heavy metals and phosphorus was substantially influenced by organic matter content, temperature, humic substances, and maturity of compost. FMC could regulate these environmental factors, thereby influencing the bioavailability of heavy metals and phosphorus. Furthermore, FMC could enhance phosphorus bioavailability by promoting microbial processes such as organic phosphorus mineralization, inorganic phosphorus solubilization, and polyphosphate degradation. These research findings provide a scientific support for the harmless treatment and resource-oriented utilization of sheep manure on QTP.

功能膜覆盖堆肥（FMC）技术的应用可以提高堆肥的腐殖化效率。然而，该技术在青藏高原的应用还有待进一步加强。此外，对该技术下堆肥中重金属和磷转化的潜在机制的研究仍然非常有限。本研究探讨了FMC对羊粪堆肥中重金属和磷在QTP上的转化和生物利用度的影响及其机制。结果表明：FMC可使堆肥温度提高10.7℃，腐植酸含量和发芽指数分别提高17.9%和13.8%。FMC使羊粪堆肥中残留Pb、Mn、Zn和Cr的比例分别提高了23.6%、11.1%、9.2%和8.0%，使活性磷浓度提高了19.2%。通过植物栽培试验发现，FMC抑制了玉米幼苗对Pb、Cr、Zn和As的吸收，同时促进了磷浓度的增加。重金属和磷的形态主要受有机质含量、温度、腐殖质和堆肥成熟度的影响。FMC可以调节这些环境因子，从而影响重金属和磷的生物利用度。此外，FMC还可以通过促进有机磷矿化、无机磷增溶和多磷酸盐降解等微生物过程来提高磷的生物利用度。研究结果为羊粪无害化处理和资源化利用提供了科学依据。

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引用次数: 0

Açaí seed valorization through torrefaction and pyrolysis: Pathways toward high-energy and low-carbon biocoal Açaí通过焙烧和热解的种子增值：通往高能量和低碳生物煤的途径

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-03-02 DOI: 10.1016/j.biombioe.2026.109192

Alisson Lara de Carvalho , Edgar A. Silveira , Thiago de Paula Protásio , Tiago Jose Pires de Oliveira

The sustainable use of Amazonian residues plays a key role in Brazil's decarbonization strategy and circular bioeconomy. Among these residues, açaí seed (Euterpe sp.) accounts for 70–80% of the fruit mass and remains largely underutilized, despite its high lignin and low ash contents. This study systematically investigated the torrefaction (200–320 °C) and pyrolysis (350–700 °C) of açaí seed in a fixed-bed reactor to define process boundaries and optimal operating conditions for high-energy solid fuel production. The reactor was operated at a heating rate of 1.67 °C min⁻¹ with a residence time of 30 min. Progressive carbonization increased the fixed carbon from 18.70% to 91.67%, while the higher heating value (HHV) rose from 19.43 to 32.97 MJ kg⁻¹. The transition from fuel-grade biocoal to reductant-grade biochar occurred between 450 and 500 °C, with the EMCI peaking (23.02) at 500 °C, where the optimal balance between solid retention and energy densification was achieved. The volumetric energy density reached 15.99 GJ m⁻³, and the resulting biochar exhibited H/C and O/C ratios as low as 0.03 and 0.10, respectively, satisfying the European Biochar Certificate criteria for highly carbonized materials. These properties indicate that açaí seed can yield carbon-rich biocoal comparable to petroleum coke, suitable for metallurgical and decentralized energy applications. Overall, this work provides an integrated assessment of açaí seed torrefaction and pyrolysis, establishing quantitative benchmarks for the valorization of this abundant agro-industrial residue and contributing to the United Nations Sustainable Development Goals (SDG 7, 12, and 13) through low-carbon bioenergy and waste-to-resource strategies.

亚马逊废弃物的可持续利用在巴西的脱碳战略和循环生物经济中发挥着关键作用。在这些残留物中，açaí种子（Euterpe sp.）占果实质量的70-80%，尽管其木质素高，灰分含量低，但仍未得到充分利用。本研究系统地研究了açaí种子在固定床反应器中的焙烧（200-320°C）和热解（350-700°C），以确定高能固体燃料生产的工艺边界和最佳操作条件。反应器在升温速率为1.67°C min - 1的条件下运行，停留时间为30 min。渐进式碳化使固定碳由18.70%增加到91.67%，较高热值（HHV）由19.43增加到32.97 MJ kg−1。从燃料级生物煤到还原剂级生物炭的过渡发生在450 ~ 500℃之间，EMCI在500℃达到峰值（23.02），此时固体保留和能量密度之间达到了最佳平衡。体积能量密度达到15.99 GJ m−3，所得生物炭的H/C和O/C比值分别低至0.03和0.10，满足欧洲生物炭证书对高碳化材料的标准。这些性质表明açaí种子可以产生与石油焦相当的富碳生物煤，适用于冶金和分散能源应用。总体而言，本研究对açaí种子的烘烤和热解过程进行了综合评估，为这种丰富的农工残渣的价值评估建立了定量基准，并通过低碳生物能源和废物资源化战略为联合国可持续发展目标（SDG 7、12和13）做出了贡献。

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引用次数: 0

Metagenomic analysis of key methanogenic pathways in solid-state anaerobic co-fermentation of weathered coal and cattle manure 风化煤与牛粪固态厌氧共发酵产甲烷关键途径的宏基因组分析

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-03-04 DOI: 10.1016/j.biombioe.2026.109175

Bo Song , Cui Quan , Hongyu Guo , Ningbo Gao

This research leveraged metagenomic sequencing to assess microbial diversity and functional activity structures during solid-state anaerobic co-fermentation of cattle manure with weathered coal, aiming to evaluate key metabolic pathways. Results demonstrated that anaerobic co-fermentation significantly enhanced biomethane production, concomitant with substantial upregulation of carbohydrate-active enzymes including cellobiose phosphorylase (GH94), glycosyltransferase (GT4), and glycoside hydrolase (GH18). The process reinforced microbial interspecies electron transfer through enrichment of 2-oxoglutarate/2-oxoacid ferredoxin oxidoreductase subunit α, pyruvate ferredoxin oxidoreductase α subunit, and methyl-coenzyme M reductase β subunit, while glucose-6-phosphate isomerase and fructose-1,6-bisphosphatase II played pivotal roles in cellulose degradation within mixed substrates. Combined Solid-state anaerobic co-fermentation was dominated by methane production from the acetyl fragmentation pathway, and that the two synergistically promoted the CO₂ reduction pathway. This study provides a mechanistic study for the treatment of weathered coal and cattle manure, which provides new ideas for solid waste treatment and clean energy.

本研究利用宏基因组测序技术评估牛粪与风化煤固体厌氧共发酵过程中的微生物多样性和功能活性结构，旨在评估关键代谢途径。结果表明，厌氧共发酵显著提高了生物甲烷的产量，同时糖活性酶包括纤维素二糖磷酸化酶（GH94）、糖基转移酶（GT4）和糖苷水解酶（GH18）也大幅上调。该过程通过富集2-氧戊二酸/2-氧酸铁氧化还蛋白氧化还原酶α亚基、丙酮酸铁氧化还蛋白氧化还原酶α亚基和甲基辅酶M还原酶β亚基来增强微生物种间电子传递，而葡萄糖-6-磷酸异构酶和果糖-1,6-二磷酸酶II在混合底物中纤维素降解中起关键作用。联合固态厌氧共发酵以乙酰破碎途径产甲烷为主，两者协同促进CO2还原途径。本研究为风化煤和牛粪的处理提供了机理研究，为固体废物处理和清洁能源提供了新思路。

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引用次数: 0

Models and methods for estimating nutrient recycling and energy recovery potentials from agricultural wastes: A case study of Henan Province in China 农业废弃物养分循环与能量回收潜力估算模型与方法——以河南省为例

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-24 DOI: 10.1016/j.biombioe.2026.109173

Long Zhang , Wuliyasu Bai , Boyan Lei , Zhiqiao Zhou

Amid global climate change and energy security concerns, the recycling and utilization of agricultural waste holds enormous potential in increasing green energy supply and improving rural production and living environments. However, little attention has been paid to how crop residues and livestock excrement contribute to meeting nutrient demands and household energy consumption. This study developed a methodological framework integrating spatial-temporal distribution analysis, nutrient recycling and energy recovery potential estimation, and resource substitution capability evaluation of agricultural waste. Then, 18 cities in China's Henan Province were taken as examples to test this framework. It revealed that: (1) From 2012 to 2023, crop residues in Henan province rose from 71.4 to 80.7 million tons, while livestock excrement dropped from over 100 to below 70 million tons. (2) About 2.0–2.5 million tons of nitrogen (N), phosphorus (P₂O₅), and potassium (K₂O) resources can be recovered from agricultural waste, meeting 30% to 50% of N and P₂O₅ requirements and 50% to 90% of K₂O requirement for local crop growth. (3) The energy recovery potential from crop residues and livestock excrement in Henan province reached 36.4–42.2 and 4.6–7.1 million tce, respectively, equivalent to 33.6–38.9 and 3.4–5.1 bcm natural gas, which is sufficient to meet local energy demands, but shows a rapid downward trend. Policy insights were drawn from the aspects of legal systems, financial incentives, technological advancements and targeted promotion.

面对全球气候变化和能源安全问题，农业废弃物回收利用在增加绿色能源供应、改善农村生产生活环境方面具有巨大潜力。然而，很少有人注意到作物残茬和牲畜粪便如何有助于满足养分需求和家庭能源消耗。构建了农业废弃物时空分布分析、养分循环与能量回收潜力估算和资源替代能力评价的方法框架。然后以河南省18个城市为例对该框架进行了验证。结果表明：(1)2012年至2023年，河南省农作物残茬从7140万吨增加到8070万吨，牲畜粪便从100多万吨下降到7000万吨以下。(2)农业废弃物可回收约200 ~ 250万吨的氮(N)、磷（P2O5）、钾（K2O）资源，满足当地作物生长所需N、P2O5的30% ~ 50%和K2O的50% ~ 90%。③河南省农作物秸秆和畜禽粪便的能源回收潜力分别达到364 ~ 4220万和460 ~ 710万tce，相当于336 ~ 38.9亿cm和3.4 ~ 51亿cm天然气，可满足当地能源需求，但呈快速下降趋势。从法律制度、财政激励、技术进步和有针对性的推广等方面获得了政策见解。

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引用次数: 0

Microalgal photobioreactors as living air purifiers for better indoor carbon dioxide quality control 微藻光生物反应器作为生活空气净化器，更好地控制室内二氧化碳质量

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-27 DOI: 10.1016/j.biombioe.2026.109178

Tanakit Komkhum , James Winterburn , Phavit Wongsirichot , Chalampol Janpum , Pichaya In-na

Microalgal photobioreactors (PBRs) have emerged as a promising approach for mitigating indoor air quality (IAQ), particularly in sequestering carbon dioxide (CO₂) and generating oxygen (O₂) within indoor spaces, unlike conventional air purifiers, whose primary function focuses on filtering particulate matter (PM) and removing volatile organic compounds (VOCs). This review aims to highlight the current state of the art of microalgal PBR-based air purifiers and critical factors influencing CO₂ sequestration including PBR design and operating/cultivation parameters. Advances in computational fluid dynamics (CFD) simulation have significantly contributed to optimizing aeration-based mixing, reducing experimental costs, and assisting system scalability. Despite these advancements, challenges remain, including the challenges in maintaining consistent CO₂ sequestration efficiency under fluctuating indoor concentrations, minimizing costs, and integrating PBRs seamlessly into urban and indoor environments. Further research should focus on optimizing microalgal CO₂ sequestration under realistic indoor CO₂ environments, developing real-time monitoring, automated control systems, and techno-economic analysis. The successful commercialization of emerging microalgal PBR-based air purifiers will require interdisciplinary collaboration among biotechnologists, engineers, architects, and policymakers to ensure scalability, affordability, and public acceptance. With continued research and supportive regulatory frameworks, microalgal PBR technology holds great potential as a revolutionizing, biological, and multifunctional solution for mitigating CO₂ and enhancing healthier indoor environment.

与传统的空气净化器不同，微藻光生物反应器（pbr）已成为缓解室内空气质量（IAQ）的一种有前景的方法，特别是在隔离二氧化碳（CO2）和在室内空间产生氧气（O2）方面。传统空气净化器的主要功能是过滤颗粒物（PM）和去除挥发性有机化合物（VOCs）。本文综述了基于PBR的微藻空气净化器的研究现状，以及影响PBR设计和操作/培养参数等CO2封存的关键因素。计算流体动力学（CFD）模拟的进步为优化基于气的混合、降低实验成本和辅助系统可扩展性做出了重大贡献。尽管取得了这些进展，但挑战依然存在，包括在室内浓度波动的情况下保持一致的二氧化碳封存效率，最大限度地降低成本，以及将pbr无缝地融入城市和室内环境。进一步的研究应着眼于优化微藻在真实的室内CO2环境下的CO2封存，开发实时监测、自动化控制系统和技术经济分析。新兴的微藻pbr空气净化器的成功商业化需要生物技术专家、工程师、建筑师和政策制定者之间的跨学科合作，以确保可扩展性、可负担性和公众接受度。随着不断的研究和支持性的监管框架，微藻PBR技术作为一种革命性的、生物的、多功能的解决方案，在减少二氧化碳排放和改善更健康的室内环境方面具有巨大的潜力。

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引用次数: 0

Economic and environmental contributions of biological nitrogen fixation in Brazilian sugarcane production 巴西甘蔗生产中生物固氮对经济和环境的贡献

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy

Pub Date : 2026-08-01 Epub Date: 2026-02-27 DOI: 10.1016/j.biombioe.2026.109174

Danilo Augusto Silvestre , Silvia Ferreira Marques Salustiano , Danilo Pereira Barbosa , Dener Marcio da Silva Oliveira , Veronica Massena Reis

Biological nitrogen fixation (BNF) mediated by plant-associated diazotrophic microorganisms can partially replace synthetic nitrogen (N) fertilizers in sugarcane systems. However, its economic relevance and contribution to greenhouse gas (GHG) mitigation remain rarely quantified. This study estimates the economic value and climate-mitigation potential of BNF as an ecosystem service in Brazilian sugarcane cultivation over ten consecutive crop seasons (2013-2014 to 2022-2023). Using data on cultivated area, yields, fertilizer prices, and field-based estimates of N derived from BNF, we quantified the economic and associated CO₂-equivalent (CO₂e) emissions resulting from biological N inputs. Biological nitrogen fixation generated cumulative economic savings of approximately US$ 15.7 billion (in constant 2024 US dollars) over the evaluated period, corresponding to an average benefit of US$ 183 ha⁻¹ yr⁻¹ through reduced dependence on synthetic N fertilizers. Simultaneously, BNF-driven N-fertilizer substitution mitigated approximately 192 million Mg CO₂e, equivalent to an average reduction of approximately 2220 kg CO₂e ha⁻¹ yr⁻¹. These results demonstrate that naturally occurring BNF represents a high-value and undercounted component of sugarcane production systems, enhancing both economic resilience to N-fertilizer price volatility and environmental performance. By valuing BNF as a production ecosystem service of sugarcane crops, this study provides a quantitative basis for incorporating biological N inputs into N management strategies, life-cycle assessments, and agricultural policy frameworks. Recognizing BNF contributions can support N-fertilizer reduction targets, improve the sustainability of sugarcane-based bioenergy systems, and strengthen climate mitigation strategies in tropical agriculture.

植物重氮营养微生物介导的生物固氮（BNF）可以部分替代甘蔗系统中的合成氮肥。然而，其经济相关性和对温室气体（GHG）缓解的贡献仍然很少量化。本研究估算了连续10个作物季节（2013-2014年至2022-2023年）巴西甘蔗种植中BNF作为生态系统服务的经济价值和气候缓解潜力。利用耕地面积、产量、肥料价格和基于农田的氮素估算数据，我们量化了生物氮素投入导致的经济和相关的二氧化碳当量（CO2e）排放。在评估期间，生物固氮产生了累计约157亿美元的经济节约（以2024年不变美元计算），相当于通过减少对合成氮肥的依赖，平均每年节约183美元。同时，bnf驱动的氮肥替代减少了约1.92亿Mg CO2e，相当于平均减少约2220 kg CO2e ha - 1 year - 1。这些结果表明，自然产生的氮肥代表了甘蔗生产系统中一个高价值但被低估的组成部分，增强了经济对氮肥价格波动的抵御能力和环境绩效。本研究通过评价生物氮素作为甘蔗作物生产生态系统服务的价值，为将生物氮素投入纳入氮素管理策略、生命周期评估和农业政策框架提供了定量依据。认识到生物燃料的贡献可以支持氮肥减排目标，提高甘蔗生物能源系统的可持续性，并加强热带农业的气候减缓战略。

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引用次数: 0