A developing small-scale reactor was examined using the principles of thermal engineering design. The thermodynamic state of the system, psychrometry, and gas dynamics of the moist gas were considered in order to evaluate the quality of the end use. The performance of the reactor was defined in terms of the upgraded fuel and the design parameters of the reactor. A ring-die was used to pelletize a milled

The presence of free fatty acids interferes with the conversion of plant oils to biodiesel. Four strong and weak base resins were evaluated for the removal of free fatty acids (FFA) from oil. Amberlite FPA 51 showed the highest adsorption capacity of FFA. A resin concentration above 3% could enable a higher percentage FFA adsorption. The adsorption process fitted a pseudo-first-order kinetic model

The catalytic effect of mineral components (K, Ca, Mg and Na), after pre-treatment by water leaching and adding NaCl, was evaluated in fast pyrolysis with the biomass of four types of agricultural waste (olive pomace, nutshell, almond shell, and pistachio shell). Water leaching proved to be effective at reducing mineral content in the raw materials, especially in terms of removing K. As a consequence

Biological waste materials are rich sources of important minerals such as calcium and potassium, which are required in the preparation of effective biocatalysts for biodiesel production. Their adoption into green catalyst production is becoming important due to the ease of process synthesis and the availability of waste animal shells and agricultural materials. In this study, the potential of a bi-component

This study presents the simulation of hydrothermal gasification (HTG) of Scenedesmus obliquus microalgae and their derivatives using Aspen Plus V11. The effect of operating parameters such as temperature, pressure, and biomass concentration on the yield and composition of gaseous products using whole algae, lipid, and lipid extracted algae (LEA) as feedstocks was examined. The results showed that reaction

Promising bifunctional catalyst systems composed of platinum and polyoxometalates (POMs) were applied successfully for the selective catalytic hydrogenation of 2,5-dimethylfuran (DMF) to 2-hexanol under mild conditions. Pt(acac)2 was found to be the most active Pt precursor for the ring opening of DMF, and the Keggin-type POM K3[PW12O40] was identified as the most promoting acidic support for 2-hexanol

Biofuels contribute environment-friendly, renewable energy, minimizing dependence on fossil energy. The pretreatment of biomass is a practical step that accelerates and facilitates the hydrolysis of complex materials. This work aimed to screen, select, and study cocktail formulations for biomass hydrolysis, where the enzymes were provided both from a commercial source (Trichoderma reesei, Novozymes®)

This study aimed to enhance the properties of films produced from corn starch and gelatin recovered from chrome (III) tanned leather waste (CTLW) through the addition of transglutaminase enzyme (TGase) and phenolic extracts from Spirulina platensis (PESP). Mechanical, chemical, physical, and biological properties were analyzed and compared with control films elaborated in the same conditions but with

This paper investigates the transformation challenges related to incumbent industries caused by technology development and industry convergence in the transition to a bioeconomy in the context of Swedish biorefinery development. It involves the emergence of new value chains and several incumbent industries such as the pulp and paper industry, the oil refinery sector, the chemical process industry,

Yeast immobilization with low-cost carrier materials is a suitable strategy to optimize the fermentation of lignocellulosic hydrolysates for the production of second-generation (2G) ethanol. It is defined as the physical confinement of intact cells to a certain region of space (the carrier) with the preservation of their biological activity. This technological approach facilitates promising strategies

This work presents an assessment of sugar-energy sector expansion in Brazil, focusing on the growth of the bioelectricity supply and considering two scenarios. The first scenario, called the BASE scenario, was based on the projection made by the Brazilian Energy Research Company (EPE) for the Brazilian commitments at the Paris agreement, presented during the COP 21 (Conference of the parties) conference

Short-rotation woody crop (SRWC) production involves a set of silvicultural practices that aim to produce large volumes of biomass over relatively short time frames. The area over which these practices are employed is likely to increase in the coming decades as the demand for bioenergy increases, but the potential effects of this change in land management, including the hydrologic effects, are largely

Rapid changes in the global climate resulting from anthropogenic activities and greenhouse gas emissions from fossil resources are encouraging commercial and academic research to seek out new routes for the production of sustainable fuels. Biodiesel, as a renewable fuel, has long been recognized as one of the solutions to meet energy demand in a climate-constrained world. Although, several routes have

Incorporating industrial symbiosis benefits into biorefinery opportunities can reduce new investment costs and possibly improve the green credentials of processes. The existing wood-processing cluster at Kawerau, New Zealand, with easy access to wood-processing residues, excess on-site geothermal energy, and on-site use of products, could provide significant symbiotic benefits for the development of

Soybean is an important commodity. Its processing generates a great variety of important commercial products and processable residues. Using the concept of biorefinery, it is possible to integrate different technologies and increase the value added by the whole process. In this work, we conducted an oriented review. First, a base process was chosen, which would produce edible soybean oil, soy protein

Transitioning from gasoline and petroleum-based products to biofuels and green chemicals is a paradigm shift that will lead to the development of the bioeconomy. In this sense, the role of biorefineries in countries like Brazil is very important as the country generates a huge amount of second generation (2G) biomass every year and also has an attractive consumable market. However, technological innovations

A freshwater Chlorella sp. was cultured at temperatures from 10 to 45 °C and synergistic stress was employed by using selective and complete nutrient depleted growth media. Temperature fluctuations were found to have a significant effect on the microalgae physiology. The optimum temperature of 35 °C shows suitability for growth in a sub‐tropical climate. The fatty acid methyl esters’ (FAMEs') composition

In this study, materials from stem, branches and bark of three native forest species from the Mediterranean region – Turkish pine (Pinus brutia Ten.), black pine (Pinus nigra L.), and black locust (Robinia pseudoacacia L.) – were harvested from marginal lands in north Greece, and were thoroughly characterized on the basis of their physical properties, combustion characteristics, chemical composition

Castor protein isolate (CPI) was prepared by aqueous solubilization of defatted castor kernel meal under alkaline conditions (pH 12.0), with precipitation at the isoelectric point (pH 5.0) followed by heat treatment. Five experimental diets were prepared by substituting soybean protein isolate (SPI) at 0%, 25%, 50%, 75%, and 100% with CPI based on protein equivalent basis. The diets were assigned as

In recent years, the use of solid biofuels (SBF) in combustion systems to generate industrial heat has become more common as they are renewable, potentially carbon neutral, and able to support an energy transition away from fossil fuels. However, despite the ready availability of waste biomass in Mexico and its suitability for incineration, the development of SBFs as a fuel source had lagged behind

A Bacillus siamensis YC‐9 strain was isolated from termite nest. The strain was used to produce several important industrial enzymes by utilizing different agricultural by‐products with solid‐state fermentation (SSF). It was observed that most of the substrates that were studied were strongly positively affected by alkaline treatment for the production of enzymes. The highest yields for protease, α‐amylase

Peptones are among the most expensive culture components used in the cultivation of microorganisms. This study was performed to prepare a protein hydrolysate from sheep wool using a locally isolated keratinolytic bacterium Bacillus licheniformis EY2 (GenBank: MN809476), and to investigate the usability of the prepared hydrolysate as a peptone in a microbial medium. The optimum pH, temperature, and

The transport sector generates up to one quarter of greenhouse gas emissions. Transport is also one of the main polluters in urban agglomerations. This has an impact on the quality of the environment and on human health. Road traffic emissions constitute up to 70% of the total emissions of the transport sector. The automotive industry is under growing pressure to reduce emissions significantly and

Woodchip impregnation plays a vital role in enhancing Kraft pulp mill's pulping efficiency. Traditionally, Kraft pulp mills uses the mill's self‐generated liquor such as black liquor, green liquor, and white liquor. However, all these liquors have operational and / or pulping efficiency limitations. In this study, the feasibility of using weak white liquor as an alternative source of mill's self‐generated

The prickly pear in Italy is mostly used for human nutrition, although different cultivars of Cactaceae are intended for different uses around the world. Currently, there is a new bio‐economy for the prickly pear linked to the use of cladodes and fruit wastes for energy and numerous biotechnological derivatives. This paper focuses on the technical and economic validation of a bioenergy‐production installation

In this study, the effect of thermo‐alkaline pretreatment and recycling of the liquid fraction (black liquor) for successive pretreatment steps on chemical composition and methane yields from horse manure was investigated. At first, horse manure was subjected to alkaline pretreatment at 70 °C for 1 h (8.6 g NaOH/100 g total solids). Pretreated biomass was then separated into solid and liquid fractions

The evaluation of engine performance and emission of biodiesel produced from African pear seed oil (APO) and its prediction using multi‐input‐multi‐output (MIMO) artificial neural network (ANN) technique was studied. A standard diesel test bed was used to carry out the evaluation using petrol‐diesel, biodiesel, and its blends, operating at various engine revolutions per minute. Sensitivity analysis

The coproduction of high‐value anthocyanin extract in the cellulosic ethanol process would diversify the co‐product market, increase revenue, and potentially improve the economics of the process. The high anthocyanin concentration in the cob and structural carbohydrates in residual stover make purple corn stover an attractive source for anthocyanin and ethanol coproduction. This study aimed to develop

This study provides a new emphasis for research on the valorization of biowastes into nanocatalyst and biorefineries to be integrated with petroleum bioupgrading and polluted water treatment. The response surface optimized batch transesterification of waste‐frying oil using methanol and sustainable animal bone valorized fluorapatite nanocatalyst (FAP) yielded approximately 97% biodiesel via a pseudo‐second‐order

Palm oil mill effluent (POME) is a palm industrial waste by‐product that is readily available and possesses high quantities of the organic compounds that are necessary for microbial growth. This study investigated the potential of immobilized Aspergillus oryzae whole cells expressing Candida antartica lipase B (r‐CALB) when using a POME‐based medium as a low‐cost carbon source within biomass support

There are a number of efficient alternative technologies for the production of fuel‐quality biodiesel from various feedstock types. The solid acid catalyzed transesterification process is one such approach. In this study, the whole process of biodiesel fuel production using solid acid catalysts has been simulated using commercially known software – SuperPro Designer – and the effects of some selected

The development of a culture medium is an essential step in any bioprocess involving microorganisms for the bioconversion of by‐products to valuable chemicals, making industries like the biofuel industry more competitive. Optimization of the bioconversion process to minimize cost while maximizing yield underscores the importance of using computational methods to identify cellular requirements under

Inspired by the Sustainable Development Goals (SDGs), this study focuses on the need for responsible and clean energy consumption, climate change mitigation, and sustainable economic growth. To this end, the study investigates the connection between biomass energy consumption, real GDP, investment in the energy sector, and CO2 emissions in the emerging (E7) countries – China, India, Brazil, Mexico

Municipal solid waste management has evolved into a promising approach to climate issues and to the growing energy demand in Tunisian cities. However, energy recovery from organic waste in the Metropolis of Tunis is still complex. This is due to the city's unpredictable economy, urbanization level, and population growth rates. So far, this unpredictability has constrained access to accurate data about

Ginkgo biloba flavonoids are important natural bioactive compounds with strong physiological effects. To develop an eco‐friendly and effective method for extracting flavonoids from plants, a microbial method involving lignocellulose‐degrading bacterial enzymes was developed to improve flavonoid extraction from Ginkgo biloba leaves. In this study, a newly isolated bacterial strain, Paenarthrobacter

In recent decades, the demand for palm oil has constantly increased and with it the cultivation of oil palms. After a period of 25 years, the oil yield of the palm trees decreases and they are felled. The trees are cut into pieces and remain on the plantations. However, due to their high moisture and sugar content, fungi and molds cause problems for replanting. The use of the wood for the timber industry

Microbial lipids are promising substitutes for petroleum and plant oil. However, the industrialization of microbial lipids is still limited and cannot compete with petrochemical petroleum due to its high production cost. Microorganisms capable of accumulating lipids and additional valuable chemicals are attractive for improving the economics of the microbial lipid production process. Compared with

Highly reactive polyols were prepared from modified acetic acid lignin (AAL) by a two‐step combination of mild hydrothermal degradation and hydroxylation. The AAL‐based polyols became relatively reactive and compatible with diisocyanate, with a reduction in the number average molecular weight (Mn) from 2923 to 684 g/mol and an increase in the hydroxyl content from 5.21 to 9.13 mmol/g. The mechanical

Since 2000, corn ethanol production in the USA has increased significantly – from 1.6 to 15 billion gallons (6.1 to 57 billion liters) – due to supportive biofuel policies. In this study, we conduct a retrospective analysis of the changes in US corn ethanol greenhouse gas emission intensity, sometimes known as carbon intensity (CI), over the 15 years from 2005 to 2019. Our analysis shows a significant

The ongoing saga of the fossil carbon‐based economy affects the wellbeing of this planet and its associated life forms, including humans. Although the bioeconomy is widely advocated as a solution, it is not growing quickly enough due to various challenges. Here, we discuss emerging opportunities to overcome these barriers and enhance the bioeconomy's potential to contribute to achieving the United

Life‐cycle inventory (LCI) is a fundamental phase in the quantification of the environmental performance of products. However, when it comes to the LCI of a multi‐product system, discussions about the choice of the appropriate methodology to allocate environmental impacts still continue. A further system subdivision and the implementation of a mechanism allowing environmental burdens to be tracked

Palestine has considerable potential for bioenergy production, which can contribute to the independence of the nation's energy sector. However, few projects have been implemented for the production and utilization of bioenergy. In this study, the potential effects of using bioenergy from various sources, such as municipal solid waste, wastewater treatment plants, and animal farms are studied. Certain

Produced by extraction from certain woods and barks with boiling water, tannin is the name given to a mixture of high molecular weight biophenols increasingly used in a number of industries. This study offers a new bioeconomy insight into an old natural product that, we argue in this study, will likely play a crucial role in the development of the bioeconomy of forest regions. After providing an updated

The prospect of utilizing yam peel hydrolysate (YPH) as a carbon source for lactic acid (LA) production using Rhizopus orysae was investigated in batch surface and submerged fermentation processes. The kinetics of biomass growth, substrate utilization and LA production were studied using models of modified Luedeking–Piret, logistic and simple Luedeking–Piret equations, respectively, for the surface

Biological sludge from wastewater treatment is a by‐product from the pulp and paper industry, for which several management approaches are being researched to develop added‐value applications and to decrease the disposal costs. This work studied biological sludge pyrolysis to produce biochar for further use as soil amendment. The pyrolysis was conducted in a bench‐scale fixed‐bed reactor using distinct

The Brazilian açaí industry reached national and international prominence in the last few years. Its final product, mainly frozen pulp, became popular worldwide, accounting for a high market share, including exports. Nevertheless, the solid by‐products arising from the processing are not always discarded in an environmentally suitable manner. This review presents a scientometric analysis of açaí research

Cell immobilization technology has shown much potential in the field of biological fermentation owing to its simple operation, maintenance of long‐term cell viability, repeatability, good stability, and high tolerance. Compared with free‐cell fermentation, immobilized cells show strong growth and metabolism performance in complex environments, such as environments with low pH, or with high concentrations

A new forest biorefining model is emerging in which high‐value materials would be produced alongside a cellulosic sugar by‐product in facilities scaled to match fiber availability in northern forests. As these emerging biorefining technologies are being developed by private entities, the economics associated with them are little known. The goal of this study is to use publicly available information

Biobased production has been promoted as an alternative to fossil‐based production to mitigate climate change. However, emerging concerns over the sustainability of biobased products have shown that tensions can emerge between different objectives and concerns, like emission reduction targets and food security, and that these are dependent on local contexts. Here we present the Open Sustainability‐in‐Design

In this work, four different media including aqueous water, acetic acid (AA), HCl, and H2SO4 were used to hydrolyze holocelluloses. The decomposition of holocellulose and pseudo‐lignin formation are discussed. It was found that AA and water are almost comparable in catalyzing holocellulose (HC) decomposition but the former can promote sugar decomposition and therefore pseudo‐lignin formation. In contrast

Indonesia has the fourth largest population in the world and in the coming years food production will need to catch up with its growth. To fulfill the protein demand of this growing population, the productivity of the Indonesian agricultural sector should be increased. This can be achieved either by expanding the agricultural land or by increasing the productivity of existing agricultural land and

Recent EU directives have encouraged member states to follow circular economy guidelines on waste reuse, especially for waste originating from wood agro‐forest biomass. Delineating the antioxidant and chemical activity of biomass is a starting point to find new ways to utilize such materials. Here, an 8‐year‐old apricot (Prunus armeniaca L.) tree stand located in southern Italy was evaluated. First

This study aims to evaluate the effects of the co‐digestion of agricultural residues with manure from camelids from the Andean zone. Different combinations of llama manure (LM) and vicuñas (VM) were made with amaranth (AS), quinoa (QS), and wheat (WS) residues. They were fermented using sewage sludge as inoculum. The co‐digestion was evaluated under mesophilic conditions for 40 days. The ratios of

Aquatic plants have been considered as a cause for concern because they impede aquatic flora and fauna. However, biofuel production from aquatic plants is an emerging energy source. As a consequence, this paper presents a detailed review of bio‐fuel production from floating aquatic plants with their physicochemical properties. The main focus of this study is to evaluate the biofuel production potential

Lignocellulose is a key starting material for the production of biofuels, biochemicals, and biomaterials. This review discusses various catalytic systems, including homogeneous and heterogeneous catalytic systems, for biomass valorization. Different strategies of biomass‐derived catalyst systems for value‐added chemicals are evaluated. Novel strategies for using biomass‐derived carbon‐based catalysts

2,5‐Furan dicarboxylic acid (FDCA) is a promising intermediate for producing polyethylene furan dicarboxylate, an alternative to polyethylene terephthalate that combines a significantly lower greenhouse gas footprint with better mechanical and gas barrier properties. This work presents a process design and techno‐economic evaluation for producing FDCA from non‐edible biomass via the oxidation of furfural

Corn stover is predominantly used as the feedstock in the cellulosic biorefineries of the Midwestern USA; however, there are several opportunities to improve the performance of its supply chain. Thus, there is a need to optimize the corn stover supply system for the overall sustainability of the corn stover‐based industries. This paper presents three practical strategies that could be implemented in

Brazilian bioethanol is one of the most prominent biofuels produced on a large scale, representing 30% of the global fuel ethanol production share. Around 8.6 billion gallons were produced in 2019, second only to the US fuel ethanol production in the same period (15.8 billion gallons). Obtained from sugarcane in a highly energy‐efficient process, the biofuel, which can be used in Brazil as 100% ethanol

Diesel and jet fuel contribute to ~22–27% and ~ 8–13% of the total energy used in the US transportation sector, producing ~25% and ~ 9% of the total greenhouse gas (GHG) emissions from this sector, respectively. Biobased alternatives, such as biodiesel and renewable jet fuel (RJF) produced from oilseeds, have lower GHG emissions than their petroleum counterparts, are renewable in nature, and support