Evaluating municipal energy efficiency in biorefinery integration

Haikonen, Turo; Tuomaala, Mari; Holmberg, Henrik; Ahtila, Pekka

doi:10.1016/j.energy.2013.09.065

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…The brown juice is also difficult to transport, so integrating SGBR with an on‐site anaerobic digester makes efficient use of this byproduct. Our finding that the IGBR was more efficient than the SGBR corroborated studies that conclude that integrated biorefineries outperformed standalone biorefineries with regard to the EE 12, 54, 55 . The EE of SGBR (77%) and IGBR (83–85%) agreed with the high EE reported for thermochemical biorefineries 22 .…”

Section: Discussionsupporting

confidence: 88%

“…Such integrated green biorefinery (IGBR) plants will produce a multitude of bioproducts (e.g., protein, fiber, heat, power, fuels), achieve high energy efficiency, and thus reduce primary energy demands. Other benefits of IGBR include the potential for heat integration, utilization of existing infrastructure, opportunities for the exchange of energy and material streams between processes, and access to existing experience and expertise 6, 12 . Integration of SGBR with other energy technologies can also benefit existing industries when developing new value chains.…”

Section: Introductionmentioning

confidence: 99%

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Green proteins: An energy‐efficient solution for increased self‐sufficiency in protein in Europe

Djomo

Knudsen

Martinsen

et al. 2020

Biofuels Bioprod Bioref

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The heavy reliance of the livestock industry of the European Union (EU) on feed protein imports has initiated a transition to alternative protein sources such as grass proteins. Green biorefineries (which process grass into protein and other related bio-products) are gaining interest in the EU as the EU searches for ways to cut its import of feed proteins, to reduce its reliance on fossil fuels, and to combat climate change. However, the vulnerability of green biorefineries to fossil energy constraints has not been studied. We estimated the energy conversion efficiencies (EE) and the energy return on investment (EROI) of bio-products from standalone (SGBR) and integrated grass refinery (IGBR) systems using scenario and energy analysis. The base scenario assumes an SGBR that processes grass into protein, fiber, and brown juice. The three IGBR scenarios assume that grass is processed into protein, fiber, and biomethane (Scenario 1); into protein, fiber, heat, and electricity (Scenario 2); or into protein, fiber, heat, and biomethane (Scenario 3). We found that the EE of the IGBR (83%-85%) largely exceeded that of the SGBR (77%) in all cases. Energy returns on investment were lower for grass than for clover-grass because of the high fertilizer needs of the former. The standard EROIs (EROI std ) for grass protein ranged from 1.6 to 5.4 over the various feedstocks and scenarios evaluated. The EROI std decreased when the system boundary was expanded to the point of use (EROI pou ), or when they were adjusted for quality (EROI qly ). Other bioproducts from both SGBR and IGBR also had high EROI std , and showed similar patterns to that of grass protein (i.e., EROI std > EROI pou > EROI qly ). Although Scenario 1 had a high EE relative to the base scenario, its heavy reliance on auxiliary energy inputs reduced the EROIs of its products. Our analysis showed the strong impacts of brown-juice recycling in the energy performance of green biorefinery. It thus deserves close attention when designing and implementing a green biorefinery in a given region. 606S Njakou Djomo et al.Modeling and Analysis: Energy Balance of Green Protein With favorable economic conditions, green biorefineries could contribute to the reduction of food and energy insecurity in Europe in a sustainable way.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Green proteins: An energy‐efficient solution for increased self‐sufficiency in protein in Europe

Djomo

Knudsen

Martinsen

et al. 2020

Biofuels Bioprod Bioref

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“…Therefore, jojobyl alcohols have pharmaceutical applications and can be obtained from biomass (jojoba oil) using a waste from the fish industry as a catalyst. The production of these valuable unsaturated long straight chain alcohols through transesterification, using a heterogeneous catalyst derived from waste, and subsequent crystallization fits perfectly with the concept of a biorefinery, where fuels, polymers, pharmaceutical products, and so forth are obtained from bio‐based materials …”

Section: Introductionmentioning

confidence: 65%

Jojoba oil biorefinery using a green catalyst. Part I: Simulation of the process

Sánchez

Marchetti

Boulifi

et al. 2014

Biofuels Bioprod Bioref

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In this paper, the concept of a biorefinery is focused on the use of jojoba oil together with a catalyst produced from waste derived from the fish industry to obtain jojobyl alcohols as a main product and fatty acid methyl ester (FAME) as co‐product. The overall process is divided into three steps: a transesterification step, crystallization step, and a purification step. For the study of this process, two different simulation softwares were used to run the mass and energy balances. In addition, the main properties of transesterified jojoba oil, jojobyl alcohols, and FAME were also determined. On one hand, the jojobyl alcohols (11‐eicosenol, 13‐docosenol, and 15‐tetracosenol), which are obtained through two‐step crystallizations, have many pharmaceutical applications and a high added value as a main product. From these results, it is concluded that the FAME obtained as a co‐product during the process is not suitable to be sold as biodiesel, but it might be used in the biorefinery to produce electricity, making the overall process energy more efficient. © 2014 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Reducing resource consumption not only cuts operational costs but also diminishes the environmental footprint of biorefinery processes, aligning them with the principles of sustainable development. 99 To achieve these optimization goals, advanced modeling and simulation techniques are extensively used. These tools allow for a detailed understanding of process dynamics, enabling the prediction of process outcomes under various conditions and the identification of bottlenecks.…”

Section: Optimization Of Biorefinery Processesmentioning

confidence: 99%

Characterization and utilization of industrial wastewater in biorefinery systems: A comprehensive approach

Castellanos,

Aryanfar,

fardinnia

et al. 2024

Env Prog and Sustain Energy

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This review explores the innovative utilization of industrial effluents in biorefinery applications, addressing the environmental challenges posed by the complex mixture of pollutants in industrial wastewater. It emphasizes the transformation of these effluents into valuable resources, such as biofuels, biochemicals, and bioplastics, through advanced biotechnological processes including anaerobic digestion, fermentation, enzymatic conversion, and microbial biomass production. The study highlights the critical role of microbial biocatalysts in breaking down diverse pollutants and transforming waste into wealth, thereby contributing to sustainable industrial practices and a circular economy. Challenges such as variability in effluent composition, inhibitory substances, and the necessity for robust bioprocesses are discussed, along with suggestions for future research directions like effluent characterization, development of specialized microbial consortia, and effective monitoring and control strategies. The review underscores the importance of collaboration between industry, academia, and government to advance biorefinery technologies, ultimately advocating for a sustainable and resource‐efficient future through the innovative treatment of industrial wastewaters.

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Evaluating municipal energy efficiency in biorefinery integration

Cited by 5 publications

References 9 publications

Green proteins: An energy‐efficient solution for increased self‐sufficiency in protein in Europe

Green proteins: An energy‐efficient solution for increased self‐sufficiency in protein in Europe

Jojoba oil biorefinery using a green catalyst. Part I: Simulation of the process

Characterization and utilization of industrial wastewater in biorefinery systems: A comprehensive approach

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