Bioresource Technology Reports最新文献_第7页

Advancements toward high-yield production of natural astaxanthin for therapeutics: Global status, challenges and future directions 用于治疗的天然虾青素高产生产的进展：全球现状、挑战和未来方向

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-03 DOI: 10.1016/j.biteb.2025.102520

Vaishali Chaudhary , Monika Prakash Rai

Astaxanthin is known to be a significant carotenoid recognized for its biomedicine and therapeutic applications offering strong immune support, antioxidant properties, and protective benefits to skin, cardiovascular system. This review discusses global market insights, ongoing challenges to cope up with and various biotechnological advancements aiming at enhancement of astaxanthin production biologically. Researchers are in process to refine cultivation conditions, optimization strategies, stress induction, and improving extraction protocol to raise overall output.This review more emphasizes on outcome-driven biotechnological approaches to optimize culture conditions for enhancing astaxanthin productivity. Additionally, AI-driven modeling platforms are emerging to serve mining of multi omics data and predicts optimal gene edits or culture parameters, accelerating the natural astaxanthin yields. Coupling high-throughput techniques like Next Generation Sequencing (NGS) with AI-driven data analysis making it possible to select the superior strains along with adjusting the growth conditions.A deeper grasp of the molecule’s biosynthetic regulation will also clarify its therapeutic promise against chronic illness. This review outlines the application of Life cycle Assessment (LCA) integrated with techno-economic analysis in evaluating the feasibility, and cost effectiveness of natural astaxanthin production, comparing conventional methods with innovative approaches enabled by genetic engineering.Future work on astaxanthin production should focus on integrating strain engineering, smart bioprocess design, and formulating sustainable assessment along with proper techno-economic analysis to overcome current limitation of biomass productivity.

虾青素是一种重要的类胡萝卜素，其生物医学和治疗应用具有强大的免疫支持、抗氧化特性和对皮肤、心血管系统的保护作用。这篇综述讨论了全球市场的见解，持续的挑战，应对和各种生物技术的进步，旨在提高虾青素生产的生物学。研究人员正在改进培养条件、优化策略、应激诱导和改进提取方案，以提高总产量。本文重点介绍了以结果为导向的生物技术方法，以优化培养条件，提高虾青素的产量。此外，人工智能驱动的建模平台正在兴起，用于挖掘多组学数据并预测最佳基因编辑或培养参数，从而加速天然虾青素的产量。将下一代测序（NGS）等高通量技术与人工智能驱动的数据分析相结合，可以选择优质菌株并调整生长条件。对这种分子的生物合成调控的更深入了解也将阐明其治疗慢性疾病的前景。本文综述了生命周期评估（LCA）与技术经济分析相结合在评价天然虾青素生产可行性和成本效益方面的应用，并比较了传统方法与基因工程创新方法。未来虾青素生产的重点应放在整合菌株工程、智能生物工艺设计、制定可持续评估以及适当的技术经济分析等方面，以克服目前生物质生产力的局限性。

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引用次数: 0

Methanolic extract of Euphorbia lactea for antimicrobial activity against Escherichia coli: Integrated FT-IR profiling and biomass characterization 大戟茶甲醇提取物对大肠杆菌的抑菌活性：综合FT-IR分析和生物量表征

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-03 DOI: 10.1016/j.biteb.2025.102532

Sheerin Bashar , Naga Jogayya Kothakota

Although antimicrobial activity of medicinal plant extracts is widely reported, most studies rely on qualitative screening or unoptimized extraction conditions, limiting reproducibility, predictability, and process scalability. In particular, systematic and statistically validated optimization of antimicrobial extraction from underexplored plant bioresources such as Euphorbia lactea remains insufficiently addressed. This study aims to overcome this limitation by integrating biomass characterization, Fourier-transform infrared (FT-IR) profiling, and response surface methodology (RSM) to quantitatively optimize the antimicrobial activity of methanolic E. lactea extracts against Escherichia coli. Comprehensive biomass analysis, including proximate, compositional, and elemental characterization, confirmed high organic and extractable fractions conducive to bioactive recovery. FT-IR analysis revealed functional groups associated with phenolics and terpenoids, supporting the presence of antimicrobial phytochemicals. A Box–Behnken design was employed to evaluate the interactive effects of incubation period, methanol concentration, and mass-to-liquor ratio on bacterial cell growth. The developed quadratic model demonstrated strong predictive performance (predicted R² = 0.9824). Numerical optimization identified optimal conditions of 60 h incubation, 100 % methanol concentration, and a mass-to-liquor ratio of 0.1, resulting in minimized bacterial growth of 0.0041 CFU/mL. By establishing a statistically optimized and reproducible extraction–activity framework, this study enhances the bioresource-based utilization potential of E. lactea and provides a transferable methodological approach for antimicrobial process optimization from plant biomass.

虽然药用植物提取物的抗菌活性被广泛报道，但大多数研究依赖于定性筛选或未优化的提取条件，限制了可重复性、可预测性和工艺可扩展性。特别是，系统和统计验证的优化从未开发的植物生物资源，如大黄蜂乳茶抗菌提取仍然没有充分解决。本研究旨在通过生物量表征、傅里叶变换红外（FT-IR）分析和响应面法（RSM）来定量优化甲醇乳茶提取物对大肠杆菌的抑菌活性，从而克服这一局限性。综合生物量分析，包括近似、组成和元素表征，证实了高有机和可提取的组分有利于生物活性回收。FT-IR分析显示了与酚类和萜类相关的官能团，支持抗菌植物化学物质的存在。采用Box-Behnken设计来评估孵育时间、甲醇浓度和质液比对细菌细胞生长的交互作用。建立的二次元模型具有较强的预测能力（预测R2 = 0.9824）。数值优化确定了最佳条件为60 h，甲醇浓度为100%，料液比为0.1，细菌生长最小为0.0041 CFU/mL。通过建立统计优化和可重复的提取活性框架，本研究增强了乳芽孢杆菌基于生物资源的利用潜力，并为植物生物量抗菌工艺优化提供了可转移的方法方法。

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引用次数: 0

Banana crop biomass-derived chemically activated filters for concurrent removal of particulate matter and volatile organic compounds 香蕉作物生物质衍生的化学激活过滤器，用于同时去除颗粒物和挥发性有机化合物

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-03 DOI: 10.1016/j.biteb.2025.102531

Yumara Martín-Cruz , Pablo Bordón , Teresa Saura-Cayuela , Mario Monzón , Elisenda Pulido-Melián

Air pollution caused by particulate matter (PM) and volatile organic compounds (VOCs) poses a critical threat to public health, contributing to millions of premature deaths each year. This growing problem underscores the urgent need for sustainable and efficient air filtration systems. This study presents the development of biodegradable filters based on biomass from banana cultivation in the Canary Islands, a residual and abundant natural resource, enabling dual valorization by using the cellulose as a structural matrix and the same biomass to produce activated carbon. Filters were fabricated via freeze-drying and incorporated activated carbon produced through chemical activation with H₃PO₄ or KOH at varying concentrations. Comprehensive characterization was conducted using scanning electron microscopy, Fourier-transform infrared spectroscopy, and porosity analysis, in addition to performance testing for both PM filtration (0.3–10 μm) and toluene gas adsorption. Filters with 10 % H₃PO₄-activated carbon showed the highest PM filtration efficiency, reaching 95 % for particles ≥0.5 μm and exceeding 90 % for submicron particles, with cumulative efficiencies over 80 % for PM_2.5 and PM₁. These results were attributed to higher surface area and internal porosity, though accompanied by an increased pressure drop (~800 Pa). In contrast, KOH-activated carbon demonstrated superior toluene adsorption capacity, remaining unsaturated for up to 350 min, due to its surface functional groups' greater affinity for non-polar compounds. The findings reveal a functional complementarity between both activation methods, allowing for the design of application-specific or dual-layer multifunctional filters. This work supports the use of banana biomass as a sustainable alternative to synthetic materials in air pollution control technologies.

由颗粒物（PM）和挥发性有机化合物（VOCs）造成的空气污染对公众健康构成严重威胁，每年导致数百万人过早死亡。这一日益严重的问题凸显了对可持续和高效空气过滤系统的迫切需求。本研究提出了一种生物可降解过滤器的开发，该过滤器基于加纳利群岛香蕉种植的生物质，这是一种剩余的丰富的自然资源，通过使用纤维素作为结构基质和相同的生物质生产活性炭，实现双重增值。采用冷冻干燥法制备过滤器，并加入不同浓度的H₃PO₄或KOH化学活化产生的活性炭。采用扫描电镜、傅里叶变换红外光谱、孔隙度分析等方法对其进行了综合表征，并对PM过滤（0.3-10 μm）和甲苯气体吸附性能进行了测试。添加10% H₃PO₄活性炭的过滤器对PM的过滤效率最高，对≥0.5 μm颗粒的过滤效率达到95%，对亚微米颗粒的过滤效率超过90%，对PM2.5和PM1的累计过滤效率超过80%。这些结果归因于更高的表面积和内部孔隙度，尽管伴随着压力降的增加（~800 Pa）。相比之下，koh活性炭表现出优异的甲苯吸附能力，由于其表面官能团对非极性化合物具有更大的亲和力，其不饱和吸附时间长达350分钟。研究结果揭示了两种激活方法之间的功能互补性，允许设计特定应用或双层多功能滤波器。这项工作支持在空气污染控制技术中使用香蕉生物质作为合成材料的可持续替代品。

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引用次数: 0

Machine learning-driven congener-specific rhamnolipids production 机器学习驱动的同源特异性鼠李糖脂生产

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-02 DOI: 10.1016/j.biteb.2025.102518

Makary Nasser , Ashutosh Singh , Guneet Kaur

Rhamnolipids are popular biosurfactants for cleaning, environmental, food, and biomedical applications. Tailoring their production for specific applications however remains a challenge owing to the structural diversity of their congeners which dictate surfactant behavior. In this work, four machine learning (ML) models were developed to predict rhamnolipids production and congener composition based on key bioprocess parameters of substrate type, pH, temperature, cultivation time, carbon to nitrogen ratio (C/N), and bacterial strain. Congeners were categorized into nine groups based on rhamnose units, fatty acid chain length, and hydrocarbon chain type (saturated or unsaturated). Among all models, Random Forest performed the best, achieving a test R² of 0.944 when predicting di-rhamnolipids with double short, saturated chains (e.g., Rha-Rha-C10-C10). SHapley Additive exPlanations (SHAP) identified bacterial strain, cultivation time, and C/N as strong predictors which was supported by Spearman's rank correlation analysis. This work provides a predictive, interpretable, and comprehensive ML framework covering 9 congener groups to support the rational design of congener-specific rhamnolipids for targeted applications.

鼠李糖脂是一种广泛应用于清洁、环境、食品和生物医学领域的生物表面活性剂。然而，由于其同系物的结构多样性决定了表面活性剂的行为，因此针对特定应用定制其生产仍然是一个挑战。在这项工作中，基于底物类型、pH、温度、培养时间、碳氮比（C/N）和菌株等关键生物工艺参数，建立了四种机器学习（ML）模型来预测鼠李糖脂的产量和同族成分。根据鼠李糖单位、脂肪酸链长度和烃链类型（饱和或不饱和）将同系物分为9类。在所有模型中，Random Forest在预测双短链饱和双链双鼠李糖脂（如rhaa - rhaa - c10 - c10）时表现最佳，检验R2为0.944。SHapley加性解释（SHAP）发现菌株、培养时间和C/N是强预测因子，Spearman等级相关分析支持这一结果。这项工作提供了一个可预测的、可解释的、全面的ML框架，涵盖了9个同源群，以支持针对目标应用的同源特异性鼠李糖脂的合理设计。

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引用次数: 0

Bioconversion of molasses and tuna condensate wastes into alternative fungal chitin-containing polysaccharide, and possibility of hydroxyapatite accumulation in fungal cell 糖蜜和金枪鱼凝结水废物转化为含几丁质真菌多糖的研究，以及羟基磷灰石在真菌细胞中积累的可能性

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-02 DOI: 10.1016/j.biteb.2025.102537

Shifa Karunia Atletika Adha , Wasana Suyotha , Benjamas Cheirsilp , Wiriya Duangsuwan , Shigekazu Yano

Fungal chitin has gained increased attention in recent years because of its non-seasonal and controllable production as well as simple extraction using mild chemicals. However, fungal chitin production has major drawbacks because fermentation requires a costly medium. This study used molasses and tuna condensate as low-cost carbon and nitrogen sources in the medium (MLFC) for fungal chitin production. Through screening, Trichoderma asperellum was selected as the test strain. MLFC yielded biomass (10.40 g/L), and acid-insoluble material (AAIM) (3.96 g/L) comparable to those from a glucose basal medium (GBM), while it gave acid-soluble material (AASM) 2.52-fold more than GBM. MLFC also provided industrially useful enzymes such as xylanase and protease. FTIR and XRD analyses showed that AAIM samples from MLFC (T-AAIM-MLFC) and GBM (T-AAIM-GBM) had similar structural properties, but these were slightly different from commercial chitin. Component analysis of acid hydrolysate indicated tentatively that they were chitin-glucan complex. T-AAIM-MLFC displayed degree of acetylation of 67.43 % with crystallinity index of 50.42 %. Interestingly, the AASM from MLFC (T-AASM-MLFC) showed FTIR and XRD spectral patterns distinct from those of chitosan and GBM-derived AASM (T-AASM-GBM). FESEM-EDX revealed that it presented a granule structure with high P and Ca contents unlike the T-AASM-GBM that had a smooth surface of nanofibers with some porosity. Further, T-AASM-MLFC showed FTIR and XRD spectral patterns closely similar to hydroxyapatite. These results demonstrate the potential of using tuna condensate and molasses as low-cost nutrient sources for fungal chitin production, while they can induce more mineral compound accumulation in the fungal wall.

近年来，真菌几丁质因其具有非季节性、可控生产、提取简单、化学成分温和等特点而受到越来越多的关注。然而，真菌甲壳素生产有主要的缺点，因为发酵需要昂贵的培养基。本研究利用糖蜜和金枪鱼凝结液作为培养基（MLFC）中低成本的碳氮源，用于真菌甲壳素的生产。通过筛选，选择曲霉木霉作为试验菌株。与葡萄糖基础培养基（GBM）相比，MLFC的生物量为10.40 g/L，酸不溶性物质（AAIM）为3.96 g/L，酸溶性物质（AASM）为GBM的2.52倍。MLFC还提供了工业上有用的酶，如木聚糖酶和蛋白酶。FTIR和XRD分析表明，MLFC （T-AAIM-MLFC）和GBM （T-AAIM-GBM）的AAIM样品具有相似的结构性质，但与商品甲壳素略有不同。酸水解产物成分分析初步表明为几丁质-葡聚糖复合物。T-AAIM-MLFC的乙酰化度为67.43%，结晶度为50.42%。有趣的是，MLFC衍生的AASM （T-AASM-MLFC）的FTIR和XRD光谱模式与壳聚糖和gbm衍生的AASM （T-AASM-GBM）不同。FESEM-EDX显示，它呈现出高P和Ca含量的颗粒结构，而T-AASM-GBM具有光滑的纳米纤维表面和一定的孔隙度。此外，T-AASM-MLFC的FTIR和XRD谱图与羟基磷灰石非常相似。这些结果表明，利用金枪鱼凝结水和糖蜜作为真菌甲壳素生产的低成本营养来源的潜力，同时它们可以诱导更多的矿物质化合物在真菌壁上积累。

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引用次数: 0

Optimizing food waste composting with consortium, jaggery, and biochar using response surface methodology 利用响应面法优化食物垃圾堆肥与财团，jaggery，和生物炭

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-02 DOI: 10.1016/j.biteb.2025.102541

Jayanta Andraskar , Atya Kalpey

Growing concern for ineffective food waste management highlights the need for sustainable waste treatment solutions such as composting. However, practicing food waste composting is challenging due to the long processing time and inferior compost quality. Although several microbial inoculation approaches exist to improve composting, their effectiveness and practical adoption remain limited. Therefore, the present study was designed to investigate the combined effect of microbial inoculum and additives (biochar and jaggery) on enhancing composting efficiency and improving final compost quality. Response Surface Methodology (RSM) was employed to optimize the concentration of inoculum and additives using Central Composite Design (CCD). Among the tested combinations, the optimized condition of 3 % jaggery, 7.5 % microbial inoculum, and 12.5 % biochar achieved a 68.1 % reduction in the C/N ratio compared to the control (40.8 %) without additives and consortium within 28 days, indicating an enhanced C/N reduction rate leading to rapid compost stabilization and reduced processing period. The final compost quality of the optimized compost showed 2.5 % phosphorus, 2.8 % nitrogen, and 2.8 % potassium, whereas the control contained 2.0 % phosphorus, 1.8 % nitrogen, and 1.9 % potassium, indicating improved compost quality and compliance with standard rules. These findings demonstrate a scalable strategy for decentralized food waste composting practice.

人们对无效的食物垃圾管理日益关注，这突出表明需要可持续的废物处理解决方案，如堆肥。然而，由于处理时间长，堆肥质量差，实践食物垃圾堆肥是具有挑战性的。虽然存在几种微生物接种方法来改善堆肥，但其有效性和实际应用仍然有限。因此，本试验旨在研究微生物接种量和添加剂（生物炭和焦渣）对提高堆肥效率和最终堆肥质量的联合作用。采用响应面法（RSM），采用中心复合设计（CCD）对接种物和添加剂的浓度进行优化。在试验组合中，以3%粗料、7.5%微生物接种量和12.5%生物炭为优化条件，28 d内的C/N比不添加添加剂和联合体的对照（40.8%）降低了68.1%，表明C/N降低速度加快，堆肥稳定速度加快，处理周期缩短。优化后的堆肥质量为2.5%磷、2.8%氮、2.8%钾，而对照的堆肥质量为2.0%磷、1.8%氮、1.9%钾，堆肥质量得到改善，符合标准规定。这些发现证明了分散食物垃圾堆肥实践的可扩展策略。

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引用次数: 0

Synthesis and characterization of a sponge from algal biomass of Tetradesmus obliquus for efficient removal of dye in contaminated water 斜四角藻生物量海绵的合成与表征及其对污染水中染料的高效去除

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-02 DOI: 10.1016/j.biteb.2025.102540

Kriti Sharma, Ashok Kumar Nadda

A novel bio-based sponge derived from Tetradesmus obliquus algal biomass has been developed to remove dye contaminants from wastewater. Tetradesmus obliquus, isolated from the cold Himalayan region, was optimised for enhanced biomass production through carbon dioxide (CO₂) augmentation and subsequently used for the production of a microalgal sponge. The total biomass production and lipid yield following CO₂ enrichment were determined. Algal growth was monitored through cell counting, gravimetric analysis (dry biomass), and biochemical analysis (protein, carbohydrates and lipids). The isolate demonstrated the highest cell count when cultured in Blue Green 11 (BG11) medium with 2 % (v/v) inoculum size at pH 7.0 on the sixth day of incubation. However, the highest biomass production of 0.06 g/L/day was achieved with 12.5 % phosphorus supplementation, while 0.12 g/L/day was achieved with 50 % nitrogen supplementation. Furthermore, CO₂ sparging at 5 L/min enhanced both biomass and lipid productivity by 1.8-fold and 5.02-fold, respectively. Consequently, this study demonstrates the successful optimization of biomass and lipid yield in a newly isolated microalgal strain using CO₂ enrichment techniques. Subsequently, the enhanced biomass was utilized to fabricate a microalgal sponge using chitosan and polyvinyl acetate as binding agents. The synthesised sponge was characterized using Field Emission Scanning Electron Microscopy (FE-SEM) and X-ray Diffraction (XRD) and was subsequently evaluated for dye removal from simulated wastewater, achieving a removal efficiency of 62 % within 20 min under optimised conditions. This study underscores the efficacy of Tetradesmus obliquus biomass as an economical and environmentally sustainable adsorbent for mitigating dye pollution in contaminated water bodies.

开发了一种新型生物基海绵，用于去除废水中的染料污染物。从寒冷的喜马拉雅地区分离出来的Tetradesmus obliquus通过增加二氧化碳（CO 2）来优化生物量生产，随后用于生产微藻海绵。测定了CO 2富集后的总生物量和脂质产量。通过细胞计数、重量分析（干生物量）和生化分析（蛋白质、碳水化合物和脂类）监测藻类生长。在pH 7.0、接种量为2% （v/v）的蓝绿11 （BG11）培养基中培养，培养第6天细胞数最高。然而，当磷添加量为12.5%时，生物量产量最高，为0.06 g/L/d，而氮添加量为50%时，生物量产量最高，为0.12 g/L/d。此外，以5 L/min的co2喷射速度使生物量和脂质产量分别提高1.8倍和5.02倍。因此，本研究证明了利用CO 2富集技术成功地优化了新分离的微藻菌株的生物量和脂质产量。随后，以壳聚糖和聚醋酸乙烯为结合剂，利用增强生物量制备微藻海绵。利用场发射扫描电镜（FE-SEM）和x射线衍射（XRD）对合成海绵进行了表征，随后对模拟废水中的染料去除效果进行了评估，在优化条件下，20分钟内的去除效率达到62%。本研究强调了斜角四角藻生物量作为一种经济和环境可持续的吸附剂在污染水体中减轻染料污染的功效。

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引用次数: 0

Preparation and characterization of nano silver infused multilayer micro fibrillated cellulose for wound dressing application 伤口敷料用纳米银注入多层微纤化纤维素的制备与表征

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-02 DOI: 10.1016/j.biteb.2025.102529

Krishna Prasad Guruswamy , Senthilkumar Thambiannan , Raja ASM , Vigneshwaran Nadanathangam , Jagajanantha Palaniappan , Seiko Jose

This research describes the development of multilayer microfibrillated cellulose (MMFC) from bleached cotton comber noil for wound dressing applications. Three different types of MMFC were prepared by fibrillation in a mass colloidal with three different spacing between the grinding stones, followed by freeze-drying. During the process of freeze drying, the microfibrillated cellulose was mechanically interlocked with silver nano particle coated cotton fabric to impart the antimicrobial properties. The physical properties of the MMFC, such as the thickness, areal density, pore size distribution, moisture vapor transmission rate, absorbency, and rate of dehydration were investigated. X-ray diffraction spectroscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy were used to characterize the MMFCs. The results inferred that the friction grinder setting is the key determining factor that influences the diameter, average pore diameter, and bubble point pore diameter of MMFC. All three MMFCs were observed to be more than 95 % porous. The water absorption, dehydration, and water vapor transmission rates were all found to be excellent. With the addition of nanosilver, the MMFC were completely resistant to chosen gram-negative (K. pneumoniae) and gram-positive (S. aureus) bacteria.

本研究描述了从漂白精梳棉中制备用于伤口敷料的多层微纤化纤维素（MMFC）的开发。采用纤维化法制备了三种不同类型的MMFC，并对其进行了冷冻干燥。在冷冻干燥过程中，微纤化纤维素与涂覆银纳米颗粒的棉织物机械互锁，赋予其抗菌性能。考察了MMFC的厚度、面密度、孔径分布、透湿率、吸湿率、脱水率等物理性能。利用x射线衍射光谱、扫描电子显微镜和傅里叶变换红外光谱对mmfc进行了表征。结果表明，磨床设置是影响MMFC直径、平均孔径和泡点孔径的关键决定因素。观察到所有三种mmfc的多孔性均超过95%。吸水率、脱水率和水蒸气透过率均较好。添加纳米银后，MMFC对选定的革兰氏阴性（肺炎克雷伯菌）和革兰氏阳性（金黄色葡萄球菌）细菌完全耐药。

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引用次数: 0

Impact of gradual vs. shock exposure to seawater salinity on nutrient removal and storage dynamics in aerobic granular sludge 逐渐与冲击暴露于海水盐度对好氧颗粒污泥中营养物质去除和储存动态的影响

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2026-01-01 DOI: 10.1016/j.biteb.2025.102523

Mohammed A. Alomari , Sarvajith M , Lucia Ruiz-Haddad , Najeh Kharbatia , Pascal E. Saikaly

Seawater intrusion impacts nutrient removal in biological wastewater treatment systems. This study evaluated the short-term response of aerobic granular sludge (AGS) to 1 % seawater salinity under gradual adaptation (GA) or shock salinity (SS) exposure. Carbon removal remained stable (>87 %), consistent with Ca. Competibacter harboring osmoprotective genes. Yet C-storage patterns shifted: glycogen regeneration decreased (Control ~1.45 mmol C/ g VSS; GA ~0.56; SS ~0.84) while PHA increased (Control ~0.74 mmol C/g VSS; GA ~0.92; SS ~1.34). Nitrogen removal stayed high (>80 %) despite slight NO₂⁻ accumulation (~0.2 mg/L). P-cycling was most affected, matching the dominance of Ca. Accumulibacter Clade II lacking osmolyte genes. P-release (~41.6 mg/L control) declined under GA (~24.48) and increased under SS (~56.48), while P-uptake decreased (control ~53.3 mg/L; GA ~0.33; SS ~0). Overall, the results showed that GA reduced salinity-driven stress and connected functional shifts to key lineages, guiding strategies to enhance AGS resilience to salinity.

海水入侵影响污水生物处理系统中营养物的去除。本研究评估了好氧颗粒污泥（AGS）在逐渐适应（GA）或冲击盐度（SS）条件下对1%海水盐度的短期反应。碳去除率保持稳定（87%），与Ca. compebacter含有渗透保护基因一致。糖原再生减少（对照组~1.45 mmol C/g VSS; GA ~0.56; SS ~0.84）， PHA增加（对照组~0.74 mmol C/g VSS; GA ~0.92; SS ~1.34）。尽管有轻微的NO₂−积累（~0.2 mg/L），但氮去除率仍然很高（> 80%）。磷循环受到的影响最大，这与缺乏渗透基因的Ca. Accumulibacter Clade II的优势相匹配。磷释放量在GA（~24.48）下下降（~41.6 mg/L），在SS（~56.48）下上升（~41.6 mg/L），磷吸收量下降（对照~53.3 mg/L, GA ~0.33, SS ~0）。总体而言，研究结果表明，GA降低了盐度驱动的胁迫，并将关键谱系的功能转变联系起来，为增强AGS对盐度的恢复力提供了指导。

{"title":"Impact of gradual vs. shock exposure to seawater salinity on nutrient removal and storage dynamics in aerobic granular sludge","authors":"Mohammed A. Alomari , Sarvajith M , Lucia Ruiz-Haddad , Najeh Kharbatia , Pascal E. Saikaly","doi":"10.1016/j.biteb.2025.102523","DOIUrl":"10.1016/j.biteb.2025.102523","url":null,"abstract":"<div><div>Seawater intrusion impacts nutrient removal in biological wastewater treatment systems. This study evaluated the short-term response of aerobic granular sludge (AGS) to 1 % seawater salinity under gradual adaptation (GA) or shock salinity (SS) exposure. Carbon removal remained stable (>87 %), consistent with <em>Ca.</em> Competibacter harboring osmoprotective genes. Yet C-storage patterns shifted: glycogen regeneration decreased (Control ~1.45 mmol C/ g VSS; GA ~0.56; SS ~0.84) while PHA increased (Control ~0.74 mmol C/g VSS; GA ~0.92; SS ~1.34). Nitrogen removal stayed high (>80 %) despite slight NO₂<sup>−</sup> accumulation (~0.2 mg/L). P-cycling was most affected, matching the dominance of <em>Ca.</em> Accumulibacter Clade II lacking osmolyte genes. P-release (~41.6 mg/L control) declined under GA (~24.48) and increased under SS (~56.48), while P-uptake decreased (control ~53.3 mg/L; GA ~0.33; SS ~0). Overall, the results showed that GA reduced salinity-driven stress and connected functional shifts to key lineages, guiding strategies to enhance AGS resilience to salinity.</div></div>","PeriodicalId":8947,"journal":{"name":"Bioresource Technology Reports","volume":"33 ","pages":"Article 102523"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922146","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}

引用次数: 0

Co-pyrolysis behaviour and kinetic analysis of waste mango seeds and low-density polyethylene for their bioenergy potential 废芒果种子和低密度聚乙烯共热解行为及其生物能源潜力的动力学分析

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2025-12-30 DOI: 10.1016/j.biteb.2025.102514

Soham Basu , Sampath Chinnam , Ranjeet Kumar Mishra , M. Srinivas Kini

The increased accumulation of agricultural residues and plastic waste highlights the need for sustainable conversion methods. This study investigates the pyrolysis behaviour and kinetic characteristics of waste mango seeds (MS), low-density polyethylene (LDPE) and their co-pyrolysed blends (10–30 wt%) for bioenergy recovery. Thermogravimetric analysis revealed multistage degradation between 200 and 600 °C, with higher heating rates shifting the decomposition peaks towards higher temperatures due to thermal lag. Kinetic characteristics using KAS, OFW, FM, TG, DAEM, and VZ models revealed average activation energies of 208–215 kJ/mol for MS and 179–219 kJ/mol for LDPE. Co-pyrolysis exhibited strong synergistic effects: MS + LDPE-20 wt% blend showed reduced activation energy (105.93 kJ/mol), indicating enhanced degradation, while 10 wt% blend demonstrated the highest activation energy (268.67 kJ/mol), suggesting improved stability. Thermodynamic evaluation confirmed all reactions were endothermic and non-spontaneous. The MS + LDPE-20 wt% blend demonstrated optimal energy efficiency, reduced activation energy, and enhanced product yield, thereby supporting co-pyrolysis as a viable strategy for sustainable energy production.

农业残留物和塑料废物的不断积累突出表明需要可持续的转化方法。本研究研究了废芒果种子（MS）、低密度聚乙烯（LDPE）及其共热解混合物（10-30 wt%）用于生物能源回收的热解行为和动力学特性。热重分析显示，在200至600°C之间存在多阶段降解，由于热滞后，较高的加热速率使分解峰向更高的温度移动。利用KAS、OFW、FM、TG、DAEM和VZ模型进行的动力学分析表明，MS的平均活化能为208 ~ 215 kJ/mol， LDPE的平均活化能为179 ~ 219 kJ/mol。共热解表现出较强的协同效应：MS + LDPE-20 wt%共热解的活化能降低（105.93 kJ/mol），表明降解能力增强，而10 wt%共热解的活化能最高（268.67 kJ/mol），表明稳定性提高。热力学评价证实所有反应均为吸热非自发反应。MS + ldpe - 20% wt%的混合物表现出最佳的能源效率，降低了活化能，提高了产品产量，从而支持共热解作为可持续能源生产的可行策略。

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引用次数: 0