Bioresource Technology Reports最新文献

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Green synthesis of graphene oxide from invasive plant species (Nymphaeaceae) for enhancing cement paste microstructure and compressive strength 绿色合成入侵植物氧化石墨烯增强水泥浆体微观结构和抗压强度

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-12-01 DOI: 10.1016/j.biteb.2024.102005

Gowhar Afzal, Tanveer Rasool

The proliferation of invasive species, particularly water lilies (Nymphaeaceae), in aquatic ecosystems, such as Dal Lake in Srinagar, J&K, India, has led to significant challenges for aquatic life. This research addresses this issue by harnessing the invasive water lily as a resource for an environmentally conscious approach to produce graphene oxide (GO) through thermal pyrolysis. The synthesized GO was incorporated into cement paste (CP) (ranging from 0 to 0.09 wt%) to explore its impact on workability, mechanical properties, and microstructure. Increasing GO concentrations led to decreased workability. However, GO positively influenced compressive strength, with optimal enhancements observed at 0.06 %, a maximum enhancement in compressive strength of 53.7 % and 35.4 % at 7 and 28 days when compared to the control CP. Microstructure analysis through FE-SEM revealed improved cement hydration, pore filling, and densified microstructure, supported by XRD and FT-IR findings. Specifically, GO at 0.06 % concentration showed notable improvements, indicating its crucial role in enhancing mechanical properties.

在印度斯利那加的达尔湖等水生生态系统中，入侵物种，特别是睡莲（睡莲科）的大量繁殖，给水生生物带来了重大挑战。本研究通过利用入侵睡莲作为一种具有环保意识的方法，通过热裂解生产氧化石墨烯（GO），解决了这一问题。将合成的氧化石墨烯掺入水泥浆（CP）中（重量%范围为0 ~ 0.09），以探索其对可加工性、力学性能和微观结构的影响。氧化石墨烯浓度增加导致和易性降低。然而，氧化石墨烯对抗压强度有积极的影响，与对照CP相比，氧化石墨烯的抗压强度提高了0.06%，在第7天和第28天的抗压强度最大提高了53.7%和35.4%。XRD和FT-IR的微观结构分析表明，氧化石墨烯改善了水泥的水化、孔隙填充和致密的微观结构。特别是，氧化石墨烯在0.06%浓度下表现出显著的改善，表明其在提高机械性能方面具有重要作用。

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引用次数: 0

Physico-chemical and thermal degradation characteristics of marine red macroalgae for sustainable packaging applications 用于可持续包装的海洋红藻的物理化学和热降解特性

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-12-01 DOI: 10.1016/j.biteb.2024.102001

Tata Alfatah , Eka Marya Mistar , Dian Aswita , Mohamed Jaber , Indra Surya

This study aims to examine the characteristics of Eucheuma cottonii, Gracilaria verrucosa, and Acanthophora spicifera red macroalgae. Eucheuma cottonii showed an average particle size of 58 μm, while Gracilaria verrucosa and Acanthophora spicifera were 84 μm and 72 μm, respectively. Besides, Eucheuma cottonii presented the lowest band of hydroxyl groups, exhibiting the formation of greater intermolecular hydrogen bonds. The red macroalgae biopolymer films were fabricated via a solvent-casting technique. The optimum performance was achieved from Eucheuma cottonii macroalgae with the tensile strength, puncture resistance, and contact angle reached 27.38 MPa, 6.72 N, and 72.58°, respectively. The increase in storage time for six months resulted in a slight decrease in the water barrier and film transparency. It appears feasible to use these red macroalgae as promising sustainable marine biomasses for practical use in eco-friendly packaging materials since the red macroalgae films showed good mechanical, water barrier, and biodegradability properties.

本研究旨在研究棉真草、疣子花和棘藻的红藻特性。棉真菊的平均粒径为58 μm，疣子葛和棘子的平均粒径分别为84 μm和72 μm。此外，棉真菊的羟基最低，表明其分子间氢键的形成较大。采用溶剂铸造技术制备了红藻生物聚合物薄膜。棉真草的抗拉强度、抗穿刺能力和接触角分别达到27.38 MPa、6.72 N和72.58°，性能最佳。6个月的储存时间增加导致水屏障和薄膜透明度略有下降。由于红藻薄膜具有良好的机械性能、水阻隔性和生物降解性，因此将红藻作为有前途的可持续海洋生物材料用于环保包装材料似乎是可行的。

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引用次数: 0

Effects of wastewater parameters on the growth and behavioral characteristics of microalgae 废水参数对微藻生长及行为特性的影响

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-12-01 DOI: 10.1016/j.biteb.2024.102003

Alpravinta Alagesan, Raymond Lau

This study investigates a cost efficient technique of microalgae cultivation via the utilization of wastewater as a cheaper, alternative culture media. Effects of significant intrinsic wastewater parameters; nitrogen, chemical oxygen demand, phosphorus and pH, that are crucial to microalgae growth, were studied via the design of experiments to better understand their role in the growth process. Findings revealed that nitrogen and chemical oxygen demand were highly influential, with optimized conditions under high concentrations resulting in maximum biomass productivity. Further analysis highlights the importance of maintaining a good nutrient balance in the culture media, and the potential impact of these parameters, particularly at extreme concentrations, on the microalgal metabolic pathway and cellular activity regulation. The biomass yield obtained at optimized culture conditions was about four times higher than in raw culture conditions while, its protein content increased by about 12 % showing the significance of the optimization carried out.

本研究探讨了一种低成本的微藻培养技术，利用废水作为一种更便宜的替代培养基。重要内在废水参数的影响；通过实验设计研究对微藻生长至关重要的氮、化学需氧量、磷和pH，以更好地了解它们在生长过程中的作用。结果表明，氮和化学需氧量的影响很大，高浓度下的优化条件使生物量生产力最大化。进一步的分析强调了在培养基中保持良好的营养平衡的重要性，以及这些参数的潜在影响，特别是在极端浓度下，对微藻代谢途径和细胞活动调节的影响。在优化条件下获得的生物量比未加工条件下提高了约4倍，蛋白质含量提高了约12%，表明了优化的意义。

引用次数: 0

Aerobic thermophilic digestion of fecal matter: Condensate recovery, low solids production, and water reuse

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-12-01 DOI: 10.1016/j.biteb.2024.102008

Ruby A. Lai , Sung-Geun Woo , Emir Aksüyek , Latifah Hamzah , Santiago Alvillar , Kartik Chandran , Craig S. Criddle

A bench-scale thermophilic sequencing batch reactor (SBR) was designed, fabricated, and tested for the recovery of clean water and the reuse of condensate. The SBR reactor was non-Fouling and membrane-free, Aerobic, low-Solids producing, and Thermophilic (FAST). Accelerated treatment of domestic wastewater organic matter enabled 99.9 % removal of total suspended solid (TSS) from influent loads and 99.8 % removal of chemical oxygen demand (COD) loads. The FAST system also ensured efficient pathogen inactivation, substrate utilization, and biomass growth that aligned with experimental results. Future research will focus on scale-up of technology and assessment of performance in diverse environments.

引用次数: 0

Microwave-assisted pretreatment for lignocellulosic biomass energy conversion path

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-12-01 DOI: 10.1016/j.biteb.2024.102006

Saleem Ethaib

Lignocellulosic biomass materials can be converted into chemicals and bioenergy materials. These materials have a recalcitrance structure and need a pretreatment process to facilitate fermentable sugar release in the subsequent process for energy recovery purposes. Microwave heating can reduce process time and energy consumption, improving product quality and yields. Recently, microwave-assisted pretreatment (MWAP) processes have grabbed wide attention among scholars as one of the biomass conversion processes into chemicals or biofuels. However, there are also some technical challenges associated with its use. MWAP is limited and requires improvement to be applicable for industrial-scale production. Therefore, understanding the fundamentals of microwave technology and MWAP rules are viable routes for large-scale application. This review highlights these fundamentals and microwave systems that can be used for MWAP. Also, it discusses the parameters of the MWAP to provide a future outlook for making MWAP and lignocellulosic biomass the benchmark feedstock for circular bioeconomic.

引用次数: 0

Biopolymer detection in Egyptian microalgae: A pathway to eco-friendly bioplastics 埃及微藻中的生物聚合物检测：生态友好型生物塑料之路

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-11-25 DOI: 10.1016/j.biteb.2024.102002

Hager E. Mohamed , Sayeda M. Abdo , Rawheya A. Salah El Din

With the increase in pollution resulting from plastic waste, it was a necessity to reduce the danger of its waste to the environment. Hence, replacing traditional plastic with bioplastic is a must. Bioplastic is more environmentally friendly materials, such as plastic made from biological sources. Green and bluegreen microalgae have recently emerged as two of the most valuable sources. This study examines the viability of using microalgal cells to produce biopolymers, such as polyhydroxybutyrate, proteins, and carbohydrates. The study employed spectrophotometric standards to quantify the concentrations of polyhydroxybutyrate (PHB) and carbohydrates. Additionally, the Kjeldahl method was utilised to determine the total protein content. Five green microalgal strains and five blue green microalgal strains were examined. Chlorophyll a was measured to track growth. Growth rate assessments revealed that Selenastrum gracile exhibited the highest chlorophyll a concentration (6.9 μg/L) at 15 days, accompanied by the highest protein content at 41.13 %. Additionally, it displayed a PHB concentration of 325 mg/mL, while exhibiting the lowest carbohydrate levels (12 mg/ml). Polyhydroxybutrate content maximum concentration was detected in Microcystis aeruginosa 720.5 μg/mL, and 31 % concentration in proteins and carbohydrates (12.3 mg/ml). Selenastrum sp. is easily cultivated and offers potential for further research. Its application in bioplastic production, through blending with other polymers, is a promising avenue for future exploration.

随着塑料垃圾造成的污染日益严重，必须减少塑料垃圾对环境的危害。因此，用生物塑料取代传统塑料势在必行。生物塑料是一种更加环保的材料，例如由生物资源制成的塑料。绿藻和蓝绿微藻是最近出现的两种最有价值的来源。本研究探讨了利用微藻细胞生产聚羟丁酸、蛋白质和碳水化合物等生物聚合物的可行性。研究采用分光光度标准来量化聚羟丁酸（PHB）和碳水化合物的浓度。此外，还采用凯氏定氮法测定总蛋白质含量。研究了五种绿色微藻菌株和五种蓝绿色微藻菌株。通过测量叶绿素 a 来跟踪生长情况。生长率评估显示，褐藻（Selenastrum gracile）在 15 天时叶绿素 a 浓度最高（6.9 μg/L），蛋白质含量最高（41.13%）。此外，它的 PHB 浓度为 325 毫克/毫升，而碳水化合物含量最低（12 毫克/毫升）。在铜绿微囊藻中检测到的聚羟基丁酸含量最高，为 720.5 μg/mL，蛋白质和碳水化合物含量为 31%（12.3 mg/ml）。硒藻很容易培养，具有进一步研究的潜力。通过与其他聚合物混合，它在生物塑料生产中的应用是未来探索的一个前景广阔的途径。

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引用次数: 0

Exploring biomass resources and conversion technologies in Bangladesh: Current status, challenges, and future prospects 探索孟加拉国的生物质资源和转化技术：现状、挑战和未来前景

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-11-21 DOI: 10.1016/j.biteb.2024.101998

Robel Ahmed, Anisur Rahman, Durjoy Kumar Paul, Mim Mashrur Ahmed

This paper assesses the potential of biomass resources in Bangladesh to meet the country's growing energy demands. It begins by analyzing the available biomass resources and their total energy content, followed by a review of the government's existing energy technologies. The study further explores innovative biomass conversion methods, discussing their benefits and challenges for maximizing electricity production. Additionally, a comparison between an ongoing project involving establishment of waste incineration-based plant and a potential anaerobic digestion (AD) plant for treating solid waste in Dhaka city, Bangladesh. This study reveals that although incineration-based plant will generate less electricity than AD, the cost of energy of the incineration plant is half of the AD plant. Moreover, Incineration is expected to inflict less damage to the human health and ecosystem compared to the AD. Overall, this study concludes that both the waste-to-energy strategies will bring significant environmental benefits compared to the traditional landfilling process.

本文评估了孟加拉国生物质资源在满足该国日益增长的能源需求方面的潜力。本文首先分析了现有的生物质资源及其总能源含量，然后回顾了政府现有的能源技术。研究进一步探讨了创新的生物质转化方法，讨论了这些方法在最大限度提高发电量方面的优势和挑战。此外，还比较了孟加拉国达卡市正在进行的建立垃圾焚烧厂的项目和潜在的厌氧消化（AD）厂处理固体废物的情况。研究显示，虽然焚烧厂的发电量低于厌氧消化厂，但焚烧厂的能源成本仅为厌氧消化厂的一半。此外，与厌氧消化法相比，焚烧法对人类健康和生态系统造成的损害预计会更小。总之，本研究得出结论，与传统的垃圾填埋工艺相比，这两种废物变能源战略都将带来显著的环境效益。

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引用次数: 0

Assessment of pyrolysis product characteristics for valorisation of Refuse Derived Fuel (RDF) 评估垃圾衍生燃料（RDF）价值化的热解产品特性

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-11-14 DOI: 10.1016/j.biteb.2024.101996

Mohd Zeeshan, Rohan R. Pande, Purnanand V. Bhale

This study investigates pyrolysis of Refuse Derived Fuel (RDF) to valorise waste at different temperatures. An experimental setup is developed to study RDF valorisation. TGA is used to analyse the thermal degradation pattern of the complex RDF composition. The RDF sample is then pyrolysed at 400, 450, 500, and 550 °C at 10 °C/min. Pyrolysis of a unique RDF composition in the study produced oil, char, wax, and gas as the end products, characterised using Bomb Calorimetry, FTIR, BET, proximate and elemental analysis, and gas analysis techniques. The study demonstrates a threefold rise in hydrogen concentration in the product gas for an increase in pyrolysis temperature of 150 °C. The primary product of RDF pyrolysis is producer gas 20.79 ± 0.21 MJ/m³, followed by char (BET) surface area 15 ± 3.52 m²/g. The findings suggest that RDF pyrolysis is a viable waste valorisation process that complements sustainable energy production.

本研究探讨了在不同温度下热解垃圾衍生燃料（RDF）以实现废物的价值化。开发了一套实验装置来研究垃圾衍生燃料的价值化。使用 TGA 分析复杂 RDF 成分的热降解模式。然后以 10 °C/min 的速度在 400、450、500 和 550 °C 下对 RDF 样品进行热解。研究中对一种独特的 RDF 成分进行热解，最终产物为油、焦炭、蜡和气体，并使用炸弹量热仪、傅立叶变换红外光谱、BET、近物和元素分析以及气体分析技术对其进行了表征。研究表明，当热解温度升高到 150 °C 时，产品气体中的氢浓度增加了三倍。RDF 高温分解的主要产物是生产气体 20.79 ± 0.21 MJ/m3，其次是炭（BET）表面积 15 ± 3.52 m2/g。研究结果表明，RDF 热解是一种可行的废物价值化工艺，是对可持续能源生产的补充。

引用次数: 0

Application of bioflocculants produced by Prestia megaterium for drinking water purification 将大型普氏菌生产的生物絮凝剂用于饮用水净化

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-11-12 DOI: 10.1016/j.biteb.2024.101997

Oluwafemi Adebayo Oyewole , Asmau Mohammed Maude , Japhet Gaius Yakubu , Desire Elechi Phillip , Abideen Ajibola , Patience Emmanuel , Olabisi Peter Abioye , Olalekan David Adeniyi , Evans Chidi Egwim , Naga Raju Maddela

Quality water is a scarce commodity in the developing countries. This paper aims to evaluate the application of bioflocculants produced by Priestia megaterium (accession number: ON184360) for drinking water purification. A total of twenty-four water samples from stream, ponds and wells were collected in sterile containers from four different Local Government Areas of Niger State, Nigeria. Each sample was treated with varying concentrations of bioflocculant and chemical flocculant (0.05, 0.1, 0.15, 0.2 and 0.5 mg L⁻¹). The microbiological and physicochemical characteristics of the treated and untreated water were determined using standard methods. The results show that water samples from stream, ponds and wells treated with the bioflocculant significantly reduced the microbial load and the physicochemical properties of the water reduced to an acceptable limit, which has practical significance for the safety of drinking water in developing countries. The bioflocculant was effective in aggregating suspended particles and thus, proved its potential to be used as alternative flocculant in the drinking water treatment process.

在发展中国家，优质水是一种稀缺商品。本文旨在评估巨栉水母菌（登录号：ON184360）生产的生物絮凝剂在饮用水净化中的应用。本文从尼日利亚尼日尔州四个不同的地方政府区域，用无菌容器收集了溪流、池塘和水井中的 24 份水样。每个水样都用不同浓度的生物絮凝剂和化学絮凝剂（0.05、0.1、0.15、0.2 和 0.5 mg L-1）进行了处理。采用标准方法测定了经处理和未经处理的水的微生物和理化特性。结果表明，经过生物絮凝剂处理的溪流、池塘和水井水样的微生物负荷明显降低，水的理化特性也降低到可接受的限度，这对发展中国家的饮用水安全具有实际意义。生物絮凝剂能有效聚集悬浮颗粒，因此证明了其在饮用水处理过程中用作替代絮凝剂的潜力。

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引用次数: 0

Robot-assisted phenotyping of a Corynebacterium strain library towards valorization of next-generation feedstocks 机器人辅助下的棒状杆菌菌株库表型分析，实现下一代原料的价值化

Q1 Environmental Science

Bioresource Technology Reports

Pub Date : 2024-11-06 DOI: 10.1016/j.biteb.2024.101994

Tamara Weiß, Fabian Stefan Franz Hartmann, Gerd Michael Seibold

The identification of microorganisms capable of efficiently using the different carbon sources (sugars, sugar acids, and sugar alcohols) and tolerating inhibitory by-products in hydrolysates is a challenge for the development of efficient bioproduction from lignocellulosic biomass (LCB). In this study, a robot-assisted screening approach was developed to characterize a collection of 32 Actinomycetes type strains, mainly belonging to the genus Corynebacterium. Using robot-assisted replica plating, the use of 12 different carbon-sources as well as the level of tolerance against prominent inhibitors derived from LCB was assessed. Based on a combined analysis of substrate utilization profiles and inhibitor tolerance five strains were chosen for further characterization in a miniaturised cultivation system using ultrafiltrated spent sulfite liquor (SSL) as the sole substrate. Noteworthy, in these experiments Corynebacterium sp. ATCC 14747 showed fast growth and biomass accumulation even in presence of high SSL concentrations.

鉴定能够有效利用不同碳源（糖、糖酸和糖醇）并耐受水解物中抑制性副产物的微生物，是利用木质纤维素生物质（LCB）进行高效生物生产所面临的一项挑战。本研究开发了一种机器人辅助筛选方法，以鉴定 32 个放线菌类型的菌株，这些菌株主要属于棒状杆菌属。利用机器人辅助复制电镀，评估了 12 种不同碳源的使用情况以及对 LCB 衍生的主要抑制剂的耐受程度。在对底物利用情况和抑制剂耐受性进行综合分析的基础上，选出了五株菌株，以超滤亚硫酸废液（SSL）为唯一底物，在微型培养系统中进行进一步鉴定。值得注意的是，在这些实验中，即使在高浓度的亚硫酸盐废液中，Corynebacterium sp.

引用次数: 0

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