Tools for a multiproduct biorefinery of Acacia dealbata biomass

López‐Hortas, Lucía; Rodríguez-González, Ismael; Díaz-Reinoso, Beatriz; Torres, María Dolores; Moure, Andrés; Domı́nguez, Herminia

doi:10.1016/j.indcrop.2021.113655

Cited by 16 publications

(10 citation statements)

References 78 publications

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“…The main neutral monosaccharides in all three acacia species were glucose, xylose, and arabinose, with a respectively overall mean of 16.2%, 7.2% and 2.6% for leaves, and 35.0%, 14.2% and 1.5% for stems. These values agree with data reported elsewhere for acacia stems [ 53 , 54 ]. As for leaves, no reports could be found in the literature about the composition of this organ’s biomass in these acacia species.…”

Section: Discussionsupporting

confidence: 93%

Valorisation Potential of Invasive Acacia dealbata, A. longifolia and A. melanoxylon from Land Clearings

et al. 2022

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Acacia spp. are invasive in Southern Europe, and their high propagation rates produce excessive biomass, exacerbating wildfire risk. However, lignocellulosic biomass from Acacia spp. may be utilised for diverse biorefinery applications. In this study, attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR), high-performance anion-exchange chromatography pulsed amperometric detection (HPAEC-PAD) and lignin content determinations were used for a comparative compositional characterisation of A. dealbata, A. longifolia and A. melanoxylon. Additionally, biomass was treated with three white-rot fungi species (Ganoderma lucidum, Pleurotus ostreatus and Trametes versicolor), which preferentially degrade lignin. Our results showed that the pre-treatments do not significantly alter neutral sugar composition while reducing lignin content. Sugar release from enzymatic saccharification was enhanced, in some cases possibly due to a synergy between white-rot fungi and mild alkali pretreatments. For example, in A. dealbata stems treated with alkali and P. ostreatus, saccharification yield was 702.3 nmol mg−1, which is higher than the samples treated only with alkali (608.1 nmol mg−1), and 2.9-fold higher than the non-pretreated controls (243.9 nmol mg−1). By characterising biomass and pretreatments, generated data creates value for unused biomass resources, contributing to the implementation of sustainable biorefining systems. In due course, the generated value will lead to economic incentives for landowners to cut back invasive Acacia spp. more frequently, thus reducing excess biomass, which exacerbates wildfire risk.

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Section: Discussionsupporting

confidence: 93%

Valorisation Potential of Invasive Acacia dealbata, A. longifolia and A. melanoxylon from Land Clearings

et al. 2022

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“…Given the great ecological threat Acacia dealbata represents, it is imperative to find alternatives for its sustainable control and mitigation. A proposed solution is the massive pruning of the species and the use of the generated biomass for bioactive compounds (e.g., [12]) or green manures (e.g., [13]).…”

Section: Introductionmentioning

confidence: 99%

Bacterial Succession during Vermicomposting of Silver Wattle (Acacia dealbata Link)

et al. 2021

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Vermicomposting is the process of organic waste degradation through interactions between earthworms and microbes. A variety of organic wastes can be vermicomposted, producing a nutrient-rich final product that can be used as a soil biofertilizer. Giving the prolific invasive nature of the Australian silver wattle Acacia dealbata Link in Europe, it is important to find alternatives for its sustainable use. However, optimization of vermicomposting needs further comprehension of the fundamental microbial processes. Here, we characterized bacterial succession during the vermicomposting of silver wattle during 56 days using the earthworm species Eisenia andrei. We observed significant differences in α- and β-diversity between fresh silver wattle (day 0) and days 14 and 28, while the bacterial community seemed more stable between days 28 and 56. Accordingly, during the first 28 days, a higher number of taxa experienced significant changes in relative abundance. A microbiome core composed of 10 amplicon sequence variants was identified during the vermicomposting of silver wattle (days 14 to 56). Finally, predicted functional profiles of genes involved in cellulose metabolism, nitrification, and salicylic acid also changed significantly during vermicomposting. This study, hence, provides detailed insights of the bacterial succession occurring during vermicomposting of the silver wattle and the characteristics of its final product as a sustainable plant biofertilizer.

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“…Acacia-mimosa plays an important commercial role since its wood can be used for the paper production through the kraft process by the amount of cellulose present in the material [267], allowing the elaboration of several products like cardboard, the paper for writing and printing, which gives it a special shine, considered of high quality, and more advantageous than eucalyptus due to the low amount of alkali it presents [263], and finally, acacia wood is also used for the production of construction materials and furniture, compounds of interest to the medicinal sector [289,290], xylooligosaccharides [291], syringaldehyde, vanillin [292], and solutions rich in glucose [293,294]. The bark is used for the production of tannins (substances of plant origin) due to the high amount present in the species (greater than 74%) [295] and other compounds such as absorbents [296], those with an antimicrobial and antioxidant capacity [266,297] and the anti-quorum sensing [298].…”

Section: Acacia (Acacia Dealbata L)mentioning

confidence: 99%

Low Indirect Land Use Change (ILUC) Energy Crops to Bioenergy and Biofuels—A Review

et al. 2022

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Energy crops are dedicated cultures directed for biofuels, electricity, and heat production. Due to their tolerance to contaminated lands, they can alleviate and remediate land pollution by the disposal of toxic elements and polymetallic agents. Moreover, these crops are suitable to be exploited in marginal soils (e.g., saline), and, therefore, the risk of land-use conflicts due to competition for food, feed, and fuel is reduced, contributing positively to economic growth, and bringing additional revenue to landowners. Therefore, further study and investment in R&D is required to link energy crops to the implementation of biorefineries. The main objective of this study is to present a review of the potential of selected energy crops for bioenergy and biofuels production, when cultivated in marginal/degraded/contaminated (MDC) soils (not competing with agriculture), contributing to avoiding Indirect Land Use Change (ILUC) burdens. The selected energy crops are Cynara cardunculus, Arundo donax, Cannabis sativa, Helianthus tuberosus, Linum usitatissimum, Miscanthus × giganteus, Sorghum bicolor, Panicum virgatum, Acacia dealbata, Pinus pinaster, Paulownia tomentosa, Populus alba, Populus nigra, Salix viminalis, and microalgae cultures. This article is useful for researchers or entrepreneurs who want to know what kind of crops can produce which biofuels in MDC soils.

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Tools for a multiproduct biorefinery of Acacia dealbata biomass

Cited by 16 publications

References 78 publications

Valorisation Potential of Invasive Acacia dealbata, A. longifolia and A. melanoxylon from Land Clearings

Valorisation Potential of Invasive Acacia dealbata, A. longifolia and A. melanoxylon from Land Clearings

Bacterial Succession during Vermicomposting of Silver Wattle (Acacia dealbata Link)

Low Indirect Land Use Change (ILUC) Energy Crops to Bioenergy and Biofuels—A Review

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