4.7 Review

Materials, fuels, upgrading, economy, and life cycle assessment of the pyrolysis of algal and lignocellulosic biomass: a review

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Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column

J. Figueras et al.

Summary: Research has shown that operating at high pressure for syngas-biomethanation can increase methane productivity, but may also raise the risk of CO inhibition for microorganisms. Investigations revealed that carboxydotrophs are less resistant to high CO exposure compared to methanogens.

BIORESOURCE TECHNOLOGY (2021)

Article Biotechnology & Applied Microbiology

Revalorization of sunflower stalk pith as feedstock for the coproduction of pectin and glucose using a two-step dilute acid pretreatment process

Qibo Zhang et al.

Summary: The study utilized a two-step approach to extract pectin and glucose from spent sunflower stalk pith, achieving high efficiency production through dilute sulfuric acid treatment and enzymatic hydrolysis, thus enhancing the commercial value of the products.

BIOTECHNOLOGY FOR BIOFUELS (2021)

Article Biotechnology & Applied Microbiology

Dynamic life-cycle carbon analysis for fast pyrolysis biofuel produced from pine residues: implications of carbon temporal effects

Kai Lan et al.

Summary: The study analyzed the dynamic carbon and energy flows of a supply chain for biofuel production from pine residues via fast pyrolysis. The carbon intensity of biofuels is affected by forest growth and yields, as well as the use of biochar.

BIOTECHNOLOGY FOR BIOFUELS (2021)

Article Energy & Fuels

Influence of temperature on products from fluidized bed pyrolysis of wood and solid recovered fuel

Laura Santamaria et al.

Summary: Fluidized bed fast pyrolysis of wood pellets and solid recovered fuel pellets was conducted to analyze the influence of reactor temperature and fuel type on product distribution. The study revealed that fuel characteristics significantly affected the composition and yield of gases, char, and tar, providing insights for deriving pyrolysis sub-models for fluidized bed gasification modeling.
Article Chemistry, Analytical

The influence of lignocellulose on biomass pyrolysis product distribution and economics via steady state process simulation

Yoong Xin Pang et al.

Summary: A simulation model was developed to study the pyrolytic behaviors of biomass and predict product yield, showing different lignocellulosic components of biomass significantly influence the product distribution and economic performance. The model was validated and counter-verified using experimental and literature-obtained values, with predictions within 10% of actual data.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2021)

Article Green & Sustainable Science & Technology

Small-scale biochar production on Swedish farms: A model for estimating potential, variability, and environmental performance

Elias S. Azzi et al.

Summary: Several small-scale pyrolysis plants have been installed on Swedish farms, converting biomass to biochar and syngas for agricultural and heating applications. These projects aim to achieve carbon dioxide removal, reduce environmental impacts, and improve farm finances and resilience. A comprehensive environmental evaluation is needed before policy support for on-farm pyrolysis projects is implemented to ensure their sustainable development.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Engineering, Environmental

Dissipation of pyridaphenthion by cyanobacteria: Insights into cellular degradation, detoxification and metabolic regulation

Seham M. Hamed et al.

Summary: This study demonstrated that cyanobacteria Nostoc muscorum showed efficient accumulation and degradation of organophosphorus pesticide PY compared to Ana-baena laxa. PY inhibited cell growth, reduced chlorophyll a content and photosynthesis related enzymes activities in both species, but the effects were less pronounced in N. muscorum.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Engineering, Environmental

Trace gas emissions from municipal solid waste landfills: A review

Zhenhan Duan et al.

Summary: This paper reviews trace gas emissions from municipal solid waste landfills, focusing on their origin, sampling and analytical techniques, quantitative emission measurement techniques, concentration and surface emission rates of common trace compounds, and environmental and health concerns. Different chemical groups dominate different waste decomposition stages, and different techniques may lead to varying results in quantifying trace gas emissions. Further studies are needed to fully understand the adverse effects of trace gas emissions and assess their environmental impacts as well as health risks.

WASTE MANAGEMENT (2021)

Article Food Science & Technology

Simultaneous isolation of cellulose and lignin from wheat straw and catalytic conversion to valuable chemical products

Bowei Yu et al.

Summary: By employing a two-stage process, high-quality cellulose and lignin were successfully isolated from wheat straw, with good yields and recovery rates.

APPLIED BIOLOGICAL CHEMISTRY (2021)

Article Agricultural Engineering

Effect of biochar addition on microbial community and methane production during anaerobic digestion of food wastes: The role of minerals in biochar

Yusron Sugiarto et al.

Summary: Compared to the control without biochar addition, the addition of raw biochar significantly increased YM by 46.9% and RM by 43.0%, while leached biochar only increased the YM by 33.2% and RM by 18.2%, respectively. The Fe-containing minerals in biochar were found to enhance VFA degradation and increase population of Clostridia and Methanosaeta, improving the CH4 production.

BIORESOURCE TECHNOLOGY (2021)

Article Agricultural Engineering

Blending industrial blast furnace gas with H2 enables Acetobacterium woodii to efficiently co-utilize CO, CO2 and H2

Katharina Novak et al.

Summary: The study investigated the impact of gas composition on CO2 utilization, growth, and acetate production in A. woodii cultures. It showed that H-2 blending was a suitable control strategy for gas fermentations, with intracellular fluxes and ATP production dependent on the availability of H-2 and CO. A. woodii was demonstrated to be a promising host for CO2 fixation from industrial gas streams.

BIORESOURCE TECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Energy and environmental assessment of residual bio-wastes management strategies

Maria Anna Cusenza et al.

Summary: This study assesses the potential energy and environmental impacts of an anaerobic digester coupled with a combined heat and power plant powered by bio-wastes from the agri-food sector through the Life Cycle Assessment methodology. The research finds that biomass transport and electricity consumed during operation phase make a significant contribution to most impact categories, and the system may achieve better energy and environmental performances compared to the national grid and composting facilities.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Green & Sustainable Science & Technology

Current status of biogas upgrading for direct biomethane use: A review

Muhammad Usman Khan et al.

Summary: Anaerobic digestion produces biogas which is a low cost and environmentally friendly energy source, but it contains unwanted elements that need to be removed through upgrading technologies. Efforts are being made to improve existing methods and develop new technologies such as cryogenic separation and biological upgrading.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Review Green & Sustainable Science & Technology

Synergy of anaerobic digestion and pyrolysis processes for sustainable waste management: A critical review and future perspectives

S. Tayibi et al.

Summary: The importance of coupling anaerobic digestion and pyrolysis, along with the synergistic effects of combining these technologies for processing organic waste, have been discussed. By maximizing energy recovery, purifying biogas, and improving process stability, the dual symbiosis of these two processes could provide a sustainable approach for eco-efficient waste management.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Environmental Sciences

Industrial symbiosis of anaerobic digestion and pyrolysis: Performances and agricultural interest of coupling biochar and liquid digestate

Saida Tayibi et al.

Summary: The study explored an innovative cascading biorefinery concept that combines anaerobic digestion with pyrolysis of digestate to improve energy recovery and fertilizer quality from organic waste. Anaerobic co-digestion of quinoa residues with wastewater sludge demonstrated stability and high methane production. Pyrolysis of solid digestate yielded biochar, bio-oil, and syngas, with potential applications in agronomy. Coupling biochar with liquid digestate enhanced tomato plant growth but also increased ammonia volatilization.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Green & Sustainable Science & Technology

Framework for consequential life cycle assessment of pyrolysis biorefineries: A case study for the conversion of primary forestry residues

P. Brassard et al.

Summary: Biomass carbon as an alternative carbon resource is gaining attention, with pyrolysis technology converting residual biomass into various products. A proposed life cycle assessment framework evaluates the environmental performance of pyrolysis biorefineries to inform evidence-based decision-making for investments in low carbon futures. The study highlights the importance of biomass feedstock supply, pyrolysis technology, co-product yields, and choice of marginal technologies in influencing the environmental performance of pyrolysis biorefineries.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Engineering, Environmental

Combined microbial transcript and metabolic analysis reveals the different roles of hydrochar and biochar in promoting anaerobic digestion of waste activated sludge

Zhijian Shi et al.

Summary: The study found that hydrochar outperformed biochar in enhancing anaerobic digestion of hydrothermal pretreated waste activated sludge, especially HC2, due to its higher methane yield and production rate. Both hydrochar and biochar facilitated protein utilization and enriched different microbes involved in protein degradation, leading to increased methane production. Metabolomic analysis revealed that hydrochar and biochar induced significant changes in metabolites related to fatty acids and amino acids metabolism, showing rapid conversion of intermediate products and microbial community structure alignment.

WATER RESEARCH (2021)

Article Environmental Sciences

Ultrasound Assisted Alkaline Pre-treatment Efficiently Solubilises Hemicellulose from Oat Hulls

Eva Schmitz et al.

Summary: The utilization of oat hulls with high hemicellulose content for dietary fiber production requires a suitable pre-treatment method. A combined ultrasonication and alkali pre-treatment method was found to be the most suitable, efficiently breaking the ester bonds and solubilizing a significant portion of hemicellulose.

WASTE AND BIOMASS VALORIZATION (2021)

Review Green & Sustainable Science & Technology

Biomass pyrolysis technologies for value-added products: a state-of-the-art review

Andrew N. Amenaghawon et al.

Summary: Biomass pyrolysis is an efficient thermochemical route for producing pyrolytic gas, bio-oil, and solid biochar with wide applications. The process efficiency is influenced by factors such as temperature, pretreatment methods, and the use of catalysts. Advanced experimental methods like Py-GC-MS/FID and TG-MS/TG-FTIR have been developed for biomass pyrolysis research.

ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2021)

Article Polymer Science

Investigation on the Preparation of Rice Straw-Derived Cellulose Acetate and Its Spinnability for Electrospinning

Juntao Yan et al.

Summary: Rice straw-derived cellulose with high purity was successfully extracted and cellulose acetate with different degrees of substitution was prepared through acetylation. The solubility and versatility of the prepared materials make them suitable for various applications.

POLYMERS (2021)

Article Energy & Fuels

Life-cycle analysis of drop-in biojet fuel produced from British Columbia forest residues and wood pellets via fast-pyrolysis

Anna Ringsred et al.

Summary: The study found that the carbon intensity of biojet fuel produced from pyrolysis-derived biocrudes is 69-71% lower than that of conventional fossil-based jet fuel, depending on the location and type of woody biomass feedstock used. The research also showed that methodological choices and technical factors have varying impacts on the carbon intensity of biojet fuel, and optimizing these parameters can reduce the carbon intensity.

APPLIED ENERGY (2021)

Article Agricultural Engineering

Bio-oil derived from banana pseudo-stem via fast pyrolysis process

Rahmad Mohd Taib et al.

Summary: This study investigated the fast pyrolysis of banana pseudo-stem (BPS) to determine the optimal conditions for maximum liquid yield, finding that a pyrolysis temperature of 500°C and a residence time of 1.02 s were ideal. Under these conditions, a total liquid yield of 39.4% was achieved, with a high heating value of approximately 5.35 MJ/kg for the BPS liquid obtained. The BPS bio-oil was found to contain common functional groups and chemical compounds related to phenols.

BIOMASS & BIOENERGY (2021)

Article Green & Sustainable Science & Technology

Fast pyrolysis of raw and acid-leached sugarcane residues en route to producing chemicals and fuels: Economic and environmental assessments

Lizet Rodriquez-Machin et al.

Summary: This study investigates the economic and environmental issues associated with a pyrolysis plant for processing sugarcane residues. It is found that the process economy heavily depends on bio-oil composition, yield, feedstock cost, and leaching conditions. Bio-oil from L-SCT and L-SCB contains more than 30 wt% levoglucosan and can be used to produce fermentable sugars or other valuable chemicals. The environmental impacts of L-SCB and L-SCT are higher than for raw biomass, with the highest impact attributed to citric acid production chain, biomass transport, and harvesting operations.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Biomass for a sustainable bioeconomy: An overview of world biomass production and utilization

Mohammed Antar et al.

Summary: This paper highlights the importance of developing and deploying sustainable biomass production methods for establishing a flourishing and sustainable bioeconomy. Biofuels and bioproducts are effective strategies for reducing greenhouse gas emissions and global warming, but face challenges such as lack of technical support and low returns. The novel concept of using signal compounds to promote plant growth could be a crucial approach for addressing climate change challenges in the future.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Review Environmental Sciences

Recent advances in thermochemical methods for the conversion of algal biomass to energy

Pritam Das et al.

Summary: Thermochemical techniques are commonly used for converting algae biomass into biofuels, with torrefaction, pyrolysis, and gasification being the most widely used methods. The study compared the efficiency and applicability of these methods and highlighted the advantages and challenges of each.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Environmental

Thermal behaviour and kinetic study of co-pyrolysis of microalgae with different plastics

Rongjie Chen et al.

Summary: The coexistence of microalgae and plastics in the ocean poses challenges to the environment, but co-pyrolysis of microalgae and plastics can reduce solid residues. The co-pyrolysis of different plastic blends with microalgae affects the generation of solid residues.

WASTE MANAGEMENT (2021)

Article Polymer Science

Chemical and Morphological Composition of Norway Spruce Wood (Picea abies, L.) in the Dependence of Its Storage

Iveta Cabalova et al.

Summary: The study found that the chemical composition and morphological properties of Norway spruce wood and bark vary depending on the part and height of the trunk, with higher extractives content and lower lignin content in the bark top. Additionally, the length and width of lignin and fibers also depend on the different parts of the tree.

POLYMERS (2021)

Article Biotechnology & Applied Microbiology

Metabolic engineering of Moorella thermoacetica for thermophilic bioconversion of gaseous substrates to a volatile chemical

Junya Kato et al.

Summary: Genetic engineering successfully enhanced acetone productivity in Moorella thermoacetica, with the highest productivity obtained under CO-H-2 conditions. Additionally, adding H-2 to CO increased acetone productivity from the same carbon source, with the maximum specific acetone production rate also increasing.

AMB EXPRESS (2021)

Article Food Science & Technology

Comparison of Moringa oleifera oils extracted with supercritical fluids and hexane and characterization of seed storage proteins in defatted flour

Jorge Martin Guzman-Albores et al.

Summary: This study compared the yield and fatty acid profiles of Moringa oleifera oils obtained through supercritical fluids extraction (SFE) and solvent extraction. It was found that SFE had a higher yield and similar fatty acid profiles, with oleic acid being the most abundant compound. Additionally, unique profiles of seed storage proteins were observed, highlighting the efficiency of SFE in obtaining high oil yields from Moringa seeds.

FOOD BIOSCIENCE (2021)

Review Engineering, Chemical

The Role of Pyrolysis and Gasification in a Carbon Negative Economy

Robert C. Brown

Summary: The International Panel on Climate Change and the 2015 Climate Summit in Paris recommend coupling efforts to reduce carbon emissions with carbon removal from the atmosphere to achieve carbon negative energy. This paper focuses on the prospects for thermochemical approaches such as pyrolysis and gasification, describing their fundamentals and characteristics, as well as their potential integration with carbon removal.

PROCESSES (2021)

Article Engineering, Chemical

Utilization of Barley Straw as Feedstock for the Production of Different Energy Vectors

Merlin Raud et al.

Summary: This study utilized barley straw for bioethanol production and demonstrated the effective utilization of process residues, showing that combustion of the residues was the preferable route for energy output.

PROCESSES (2021)

Article Engineering, Chemical

Upgrading of Coffee Biocrude Oil Produced by Pyrolysis of Spent Coffee Grounds: Behavior of Fatty Acids in Supercritical Ethanol Reaction and Catalytic Cracking

Ji-Yeon Park et al.

Summary: The study evaluated the feasibility of upgrading coffee biocrude oil through supercritical ethanol reaction and catalytic cracking to improve its undesirable properties. The results showed that both methods were effective in reducing the oxygen content in the oil and converting fatty acids into more desirable compounds.

PROCESSES (2021)

Article Agricultural Engineering

Methane production from syngas using a trickle-bed reactor setup

Nabin Aryal et al.

Summary: The study demonstrates the methanation and upgrading of syngas to biomethane in a fed-batch trickle-bed reactor system using manure or sludge-based inoculum. Addition of exogenous H2 allows for further upgrading of syngas to biomethane in the same reactors, showing functional redundancy among microbial communities.

BIORESOURCE TECHNOLOGY (2021)

Article Environmental Sciences

Towards sustainable agriculture with carbon sequestration, and greenhouse gas mitigation using algal biochar

Sharma Mona et al.

Summary: With the growth in global population, demand for food and products has increased, leading to pressure on the agricultural sector. This has resulted in a shift towards eco-friendly organic fertilizers and substitutes to maintain a sustainable environment. Microalgae, with their high CO2 capturing potential, offer a solution to mitigate the greenhouse effect and are considered a productive alternative for sustainable agriculture.

CHEMOSPHERE (2021)

Review Thermodynamics

Current status of biohydrogen production from lignocellulosic biomass, technical challenges and commercial potential through pyrolysis process

Wei-Hsin Chen et al.

Summary: This review article explores the potential of hydrogen production from biomass pyrolysis, providing a comprehensive analysis of the current technology status and future prospects to guide further research and commercialization efforts.

ENERGY (2021)

Review Chemistry, Multidisciplinary

Conversion of biomass to biofuels and life cycle assessment: a review

Ahmed Osman et al.

Summary: The global energy demand is projected to increase by nearly 28% by 2040, leading to a growing interest in utilizing biomass as a renewable energy source for producing biofuels. Life cycle assessment plays a crucial role in providing insights into the environmental impacts associated with biofuel production chains. The integration of thermochemical and biochemical conversion routes shows promise for enhancing process efficiency in biomass-to-biofuel conversion, with ongoing research and publication efforts focusing on addressing knowledge gaps in the field.

ENVIRONMENTAL CHEMISTRY LETTERS (2021)

Article Energy & Fuels

Pyrolysis of agricultural waste biomass towards production of gas fuel and high-quality char: Experimental and numerical investigations

Agata Mlonka-Medrala et al.

Summary: This study investigated the pyrolysis of agricultural biomass and found that the quality, yield, and gas component concentration of pyrolytic gas increased with temperature, while the concentration of carbon dioxide decreased. Condensed vapours were found to be rich in phenolic and aromatic compounds.
Article Chemistry, Applied

Primary fragmentation behavior of refuse derived fuel pellets during rapid pyrolysis

Ilman Nuran Zaini et al.

Summary: Primary fragmentation during rapid pyrolysis greatly affects particle size distribution and char conversion rates in fixed bed gasifiers. This study investigates the primary fragmentation behavior of RDF pellets with different cardboard-PE blending ratios during pyrolysis tests. The results show that the composition of RDF pellets has a significant impact on fragmentation compared to pyrolysis temperature, and the modified Fragmentation Ratio is introduced to quantify the degree of fragmentation.

FUEL PROCESSING TECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

An anticipatory life cycle assessment of the use of biochar from sugarcane residues as a greenhouse gas removal technology

David Lefebvre et al.

Summary: Biochar is a promising greenhouse gas removal technology, especially when produced from sugarcane residues in South America. However, the emissions associated with the production process may offset some of the greenhouse gas benefits, indicating the importance of careful assessment and management.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Green & Sustainable Science & Technology

A critical review on biochar for enhancing biogas production from anaerobic digestion of food waste and sludge

Manish Kumar et al.

Summary: Biochar as an additive plays a significant role in anaerobic digestion, promoting biogas production and addressing environmental issues.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Comparison of pyrolysis and hydrolysis processes for furfural production from sugar beet pulp: A case study in southern Idaho, USA

Matthew A. Thompson et al.

Summary: The study compares the economic and environmental benefits of pyrolysis and hydrolysis technologies in furfural production, finding that the pyrolysis pathway has lower total costs and emissions, which can be reduced by using portable refining units near collection sites.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Location of the waste incineration plant with particular emphasis on the environmental criteria

Krzysztof Gaska et al.

Summary: The paper introduces a methodology for analyzing the impact of waste management systems on the environment based on the environmental quality index. By comparing the environmental quality index of different location variants, the method allows for determining the most environmentally favorable location.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Green & Sustainable Science & Technology

Energy recovery from municipal solid waste using pyrolysis technology: A review on current status and developments

M. M. Hasan et al.

Summary: The utilization of municipal solid waste (MSW) as a renewable energy source through pyrolysis technology is considered revolutionary and promising. The temperature, process parameters, and environmental considerations are crucial factors to be studied for maximizing biofuel production and ensuring eco-friendly operation of pyrolysis facilities.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Green & Sustainable Science & Technology

Comprehensive study on thermochemical putrefaction of Delonix Regia in non-catalytic, catalytic and hydro-catalytic pyrolysis atmospheres

Harshal D. Kawale et al.

Summary: The study focuses on the fuel potential of a biomass, Delonix Regia, and the characteristics of the bio-oil derived from it, with the aim of optimizing bio-oil production through different pyrolysis methods.

RENEWABLE ENERGY (2021)

Article Green & Sustainable Science & Technology

Life cycle assessment of biodiesel production utilising waste date seed oil and a novel magnetic catalyst: A circular bioeconomy approach

Kamla S. Al-Mawali et al.

Summary: Utilizing waste date seed in combination with a cheap magnetic solid acid catalyst has the potential to create more sustainable and cost-effective catalytic systems for biodiesel production. The solid catalyst showed high catalytic performance with 91.4% biodiesel yield under optimal conditions, and could be easily recovered through magnetic decantation for five consecutive reuses without significant degradation. The approach has the potential to facilitate the development of circular bioeconomy and complete the full cycle of waste date seed sustainably.

RENEWABLE ENERGY (2021)

Article Environmental Sciences

Biochar produced from wood waste for soil remediation in Sweden: Carbon sequestration and other environmental impacts

Asterios Papageorgiou et al.

Summary: The use of biochar to stabilize soil contaminants is a promising environmental technique that can significantly reduce climate change impact. However, further research is needed to assess the effects of biochar on leaching of certain metal(loid)s.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Chemistry, Analytical

Rice Husk-Derived Cellulose Nanofibers: A Potential Sensor for Water-Soluble Gases

Naresh Shahi et al.

Summary: Cellulose and its derivatives have been explored as potential gas sensing materials due to their renewability, versatility, and biocompatibility. In this study, cellulose nanofibers and TEMPO-oxidized cellulose nanofibers extracted from rice husks were fabricated into highly sensitive gas sensing films. The results demonstrated that these nanocellulose-based sensors exhibit good sensitivity for detecting water-soluble gases under ambient conditions.

SENSORS (2021)

Review Green & Sustainable Science & Technology

Minimizing carbon footprint via microalgae as a biological capture

Helen Onyeaka et al.

Summary: The threatening crisis of climate change and pollution has attracted worldwide attention for decades. Carbon capture and storage methods are economically cumbersome, but biological capture of carbon dioxide using microalgae is considered an attractive solution, recycling CO2 and producing biomass for bioenergy and other products.

CARBON CAPTURE SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Thermophilic anaerobic digestion of Sargassum fulvellum macroalgae: Biomass valorization and biogas optimization under different pre-treatment conditions Mohamed

Mohamed Farghali et al.

Summary: The study demonstrated that the utilization of Sargassum fulvellum macroalgae in anaerobic digestion systems, especially the biologically treated digesters, can significantly enhance methane yield. Chemical pretreatments also showed to increase methane output, but raw untreated algae proved to be a better option in comparison.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Review Engineering, Environmental

Thermochemical conversion strategies of biomass to biofuels, techno-economic and bibliometric analysis: A conceptual review

Ahmed M. Elgarahy et al.

Summary: The utilization of petroleum-based fuels has led to depletion of resources and global warming, prompting the exploration of new renewable energy sources. Waste biomass is seen as a promising, clean, and viable solution for future energy and fuels. From an economic perspective, thermochemical conversion methods of biomass are considered flexible and efficient.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Green & Sustainable Science & Technology

Optimization of palm shell pyrolysis parameters in helical screw fluidized bed reactor: Effect of particle size, pyrolysis time and vapor residence time

Khan Muhammad Qureshi et al.

Summary: This study investigated the production of bio-oil from palm shell pyrolysis using a helical screw fluidized bed reactor setup, finding the optimum conditions for highest bio-oil yield and heating value. The reactor demonstrated the capability of handling large biomass particle sizes up to 10 mm with minimal deteriorations in product yield and heating value, offering the possibility of pyrolysis without the need for biomass size reduction processes.

CLEANER ENGINEERING AND TECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

Production and characterization of biochar produced from slow pyrolysis of pigeon pea stalk and bamboo

Swapna Sagarika Sahoo et al.

Summary: The study investigated the impact of pyrolysis temperature on biochars derived from bamboo and pigeon pea stalk, indicating that biomass composition significantly affects biochar yield and properties. Higher lignin content in bamboo biomass resulted in greater biochar yield compared to pigeon pea stalk biomass at the same pyrolysis temperature, emphasizing the importance of biomass composition in biochar production. Additionally, biochars obtained at a pyrolysis temperature of 600 degrees C exhibited higher fixed carbon content, carbon mass fraction, and BET surface area, suggesting optimal conditions for biochar production.

CLEANER ENGINEERING AND TECHNOLOGY (2021)

Review Biotechnology & Applied Microbiology

Potential for reduced water consumption in biorefining of lignocellulosic biomass to bioethanol and biogas

Hua-wei Yuan et al.

Summary: The production of lignocellulosic bioethanol is water-intensive and limited water resources hinder its industrial production and environmental feasibility. By implementing strategies like high solid loading, omitting water washing, and recycling wastewater, water consumption can be reduced to improve efficiency and sustainability.

JOURNAL OF BIOSCIENCE AND BIOENGINEERING (2021)

Review Food Science & Technology

Olive Leaf Waste Management

Julia Espeso et al.

Summary: The article discusses the importance of olive leaf waste in olive oil production and its potential applications in various fields. It also explores the current processing methods and applications of treated olive leaves.

FRONTIERS IN SUSTAINABLE FOOD SYSTEMS (2021)

Article Plant Sciences

Bioactivity of Ellagic Acid and Velutin: Two Phenolic Compounds Isolated from Marine Algae

Sherif Hassan et al.

Summary: Marine macroalgae are rich in polyphenols and flavonoids, exhibiting excellent antimicrobial, antiprotozoal, and antioxidant properties. Extracted ellagic acid and velutin showed high antimicrobial and antiprotozoal activities, suggesting their potential as pharmaceutically bioactive natural compounds.

EGYPTIAN JOURNAL OF BOTANY (2021)

Article Energy & Fuels

Co-pyrolysis of microalgae and municipal solid waste: A thermogravimetric study to discern synergy during co-pyrolysis process

S. S. V. Varsha et al.

Summary: Synergism during the co-pyrolysis of microalgae, municipal solid waste, and their blends was evaluated based on thermal decomposition pattern, evolved gases, rate and extent of thermal decomposition, and kinetic parameters. Microalgae showed thermal resistance, while municipal solid waste was thermally sensitive. The obtained thermal and kinetic data can serve as a basis for scale-up and reactor design of pyrolysis process for similar waste streams.

JOURNAL OF THE ENERGY INSTITUTE (2021)

Review Green & Sustainable Science & Technology

Biomass pyrolysis: past, present, and future

Tamer Y. A. Fahmy et al.

ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2020)

Article Biotechnology & Applied Microbiology

Modeling, simulation and life-cycle assessment of the use of bio-oil and char in conventional refineries

Pedro L. Cruz et al.

BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR (2020)

Article Environmental Sciences

Influence of Moisture Contents on the Fast Pyrolysis of Trommel Fines in a Bubbling Fluidized Bed Reactor

Joseph Eke et al.

WASTE AND BIOMASS VALORIZATION (2020)

Article Energy & Fuels

Pyrolysis characteristics, fuel properties, and compositional study ofMadhuca longifoliaseeds over metal oxide catalysts

Ranjeet Kumar Mishra et al.

BIOMASS CONVERSION AND BIOREFINERY (2020)

Article Energy & Fuels

Prediction of pyrolytic product composition and yield for various grass biomass feedstocks

Pathy Abhijeet et al.

BIOMASS CONVERSION AND BIOREFINERY (2020)

Review Agricultural Engineering

Recent advances in the pretreatment of microalgal and lignocellulosic biomass: A comprehensive review

Revathy Sankaran et al.

BIORESOURCE TECHNOLOGY (2020)

Article Green & Sustainable Science & Technology

Catalytic pyrolysis of chemical extraction residue from microalgae biomass

Zhiqiang Gong et al.

RENEWABLE ENERGY (2020)

Review Astronomy & Astrophysics

Climate Extremes and Compound Hazards in a Warming World

Amir AghaKouchak et al.

ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 48, 2020 (2020)

Article Agricultural Engineering

Optimization of slow pyrolysis process parameters using a fixed bed reactor for biochar yield from rice husk

Fabio Roberto Vieira et al.

BIOMASS & BIOENERGY (2020)

Article Agricultural Engineering

Catalytic pyrolysis and liquefaction behavior of microalgae for bio-oil production

Yufu Xu et al.

BIORESOURCE TECHNOLOGY (2020)

Article Green & Sustainable Science & Technology

Thermodynamic and environmental assessment of different scenarios for the insertion of pyrolysis technology in palm oil biorefineries

Eric Alberto Ocampo Batlle et al.

JOURNAL OF CLEANER PRODUCTION (2020)

Article Energy & Fuels

Pyrolysis ofDelonix Regiaand Characterization of Its Pyrolytic Products: Effect of Pyrolysis Temperature

Harshal D. Kawale et al.

JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME (2020)

Review Green & Sustainable Science & Technology

A comprehensive state-of-technology review for upgrading bio-oil to renewable or blended hydrocarbon fuels

Samuel Hansen et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2020)

Article Green & Sustainable Science & Technology

Anaerobic digestion of swine manure using aqueous pyrolysis liquid as an additive

Xiunan Yu et al.

RENEWABLE ENERGY (2020)

Review Biotechnology & Applied Microbiology

Biochar physicochemical properties: pyrolysis temperature and feedstock kind effects

Agnieszka Tomczyk et al.

REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY (2020)

Article Environmental Sciences

Comparison of different crop residue-based technologies for their energy production and air pollutant emission

Yanhui Dai et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2020)

Article Materials Science, Multidisciplinary

Preparation of nanocellulose from steam exploded poplar wood by enzymolysis assisted sonication

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