Metal distribution in the process of lignocellulosic ethanol production from heavy metal contaminated sorghum biomass

Vintilă, Teodor; Negrea, Adina; Barbu, Constantin Horia; Sumalan, Radu; Kovács, Kornél L.

doi:10.1002/jctb.4902

Cited by 22 publications

(14 citation statements)

References 19 publications

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“…Various studies have been conducted to determine reducing sugar (glucose) and ethanol yield from lignocellulosic biomass [30,57,58,59]. Typically, most of the lignocellulosic biomass from agriculture consists of about 40%-50% cellulose, 20%-30% hemicellulose, and 10%-25% lignin [60].…”

Section: Discussionmentioning

confidence: 99%

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Awoyemi¹,

Adeleke²

2017

WJAR

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Potentially toxic concentrations of certain mineral elements may be taken up in plant biomass produced on coal fly ash (CFA) contaminated soil. This raises concerns about efficiencies of downstream processes, such as hydrolysis and fermentation involved in biomass conversions to bioethanol. A greenhouse pot experiment was conducted to assess bioethanol yield from switchgrass biomass produced on CFA-amended soil (0, 7.5 and 15 %, w/w CFA/soil). Separate aliquots of the CFA-amended soils were either inoculated with isolate of arbuscular mycorrhizal fungi (AMF), Rhizophagus clarus, or fortified with reduced glutathione (GSH). Mineral elements in the CFA-amended soils and plant tissues were determined using ICP-OES. Shoot samples of harvested biomass were subjected to microwave-assisted acid pretreatment, enzymatic hydrolysis and fermentation. The reducing sugar (glucose) and bioethanol in the biomass hydrolysate were determined by spectrophotometry. Results showed that CFA had a concentration-dependent increase on the levels of the mineral elements in soils that were amended. Subsequent uptake of the mineral elements in switchgrass tissues was modulated by CFA-soil amendment, AMF inoculation, and GSH fortification. The glucose concentrations in biomasss hyzrolysate of switchgrass grown on 7.5 and 15% CFA-amended soils were significantly higher (p < 0.05) than the unamended (control) soil without significant adverse effect on the bioethanol yield. The bioethanol concentration (µg/mg DW) in the fermented hydrolysate of switchgrass grown on 15% CFA-amended soil (26.63) was higher than the control soil (24.46). Likewise, AMF and GSH enhanced bioethanol yield from hydrolysate of switchgrass biomass grown on the CFA-amended soil. Our results indicated that coupling CFA-amended soil with either AMF or GSH can enhance bioethanol yield.

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Section: Discussionmentioning

confidence: 99%

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Awoyemi¹,

Adeleke²

2017

WJAR

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“…It is obvious that the first three best potentials in terms of sugar production per hectare are hybrids F135ST, Sugargraze II and Sugargraze, in the range of 4500 -7000kg/ha. These sugars obtained in polluted area can be used in biorefinery to produce biofuels and other biochemical, as described in our previous research [13], and bagasse can be used as co-substrate in anaerobic digestion for biogas production. In the same previous work, data indicate that the metal concentrations in sorghum juice obtained in the same polluted area are below the established maximal thresholds; therefore, the sorghum juice can be used in food industry as well.…”

Section: B Sugar Extractionmentioning

confidence: 98%

“…Sorghum cultures have been previously applied in phytoextraction experiments in in polluted areas [10]- [12]. Our research results indicated sweet sorghum as a good alternative to use heavy metals polluted land for fuel bioethanol production [13]. In this regard, the aim of this study was to evaluate the potential of sugars production of several sweet sorghum hybrids cultivated in heavy metals polluted area.…”

Section: Introductionmentioning

confidence: 98%

Sugar Production Potentials of Some Sweet Sorghum Hybrids Cultivated in Heavy Metals Polluted Soil

Vintilă¹,

Trulea²,

Popa³

et al. 2017

JOAAT

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Biomass samples from field trials of seven sweet sorghum hybrids cultivated in heavy metals polluted area where harvested and the main production features where quantified. Sugars were harvested from sorghum stalks by pressing the juice and by water extraction of sugars from resulted bagasse. Sugars production was quantified (glucose by enzymatic assay and total reducing sugars by DNS assay). The sorghum hybrids evaluated in this work accumulated high quantities of biomass in 140 days of cultivation (up to 33 tons D.M.• ha-1). Up to 270 mg• g-1 of juice was extracted from the fresh biomass containing up to 85 mg• ml-1 reducing sugars. By water extraction, low concentration sugars solutions are obtained, but higher yields reported to sorghum biomass comparing with juice pressing. the first three best potentials in terms of sugar production per hectare are hybrids F135ST, Sugargraze II and Sugargraze. In conclusion, Sweet sorghum [Sorghum bicolor (L) Moench] can be successfully cultivated in heavy metals polluted area to produce biomass and sugars for industrial purpose that can be used to produce biofuels and other biochemicals. Cultivation of the seven sorghum hybrids in tested conditions for a period longer than 140 days (up to 170 days) does not increase the sugar production potentials, by contrary, in the most of cases the yielding potentials decreases.

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“…The Patent Application is registered to Romanian Office for Inventions and Marks. "This invention brings an extremely important novelty, namely: treating lignocellulosic biomass by original patented process has better effect in terms of improving access of enzymes for hydrolysis of cellulose than conventional methods of thermalchemical pretreatment (alkaline/steam) " [20]. The treatment of biomass according to patenting process has triple effect: (1) preservation of sugars, (2) extraction of sugars and (3) release of cellulose from lignocellulosic complex and access of cellulolytic enzymes to hydrolyse cellulose to glucose.…”

Section: Bioeconomy and Rural Pole Development And Circular Economymentioning

confidence: 99%

Research studies on bio-economic development of Banat region: traditions, actualities, perspectives.

Matiuti¹,

Diaconescu²,

Huţu³

et al. 2019

ARA Journal

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This scientific paper advances a possible solution for the creation of a Biocultural Protocol for the rural communities of Banat region maintaining or reviving rural vivacity. By traditions point a view the local breeds are part of the Cultural Intelligence of rural communities in Romania. They show the intelligence, work and creativity of the people of this communities. Preserving local breeds means respect for the community that created them and for the work involved in this process. Actually, the Transilvanian Rare Breeds Association offers constantly through Consultancy but also by University extension, support those local livestock breeds giving them solutions for their preservation and maintaining their motivation. Ethnozootecny studies the relation between man-animal-environment in past and present societies and their transformations determined by animal breeding evolution. Ethnozootechny gathers elements of comparison, reflexion and useful information for those who are interested in history and in the future of animal breeding. The destruction of the zoogenetic biodiversity means destroying a lifestyle, a civilisation. Genetic diversity is a basis for food security and rural development. Ethnogastronomy have a large number of recipes. Products made from recipes are verified over the course of time. Each community in Banat borrowed from one another what was best. It is important for Banat bioeconomy to facilitate the rapid implementation of technical and technological innovations such as eco, nature-friendly technologies. One example for bioeconomic competitiveness is the rural pole of local development-several projects intentions are ongoing. In the perspective, the Banat should have the Resilience force, meaning the ability to resist bio-economically or economically through the multitude of existing knowledge. The territorial capital of Banat Euroregion is not enough known. When a territorial capital will be established, correct decisions can be made and the territorial economic intelligence may be determined.

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Metal distribution in the process of lignocellulosic ethanol production from heavy metal contaminated sorghum biomass

Abstract: BACKGROUND: The objective of this work was to process the sorghum biomass obtained from crops cultivated on heavy metals polluted soil, for the production of lignocellulosic ethanol and to determine the amount of toxic metals in the intermediary, byproducts, and final products.

Cited by 22 publications

References 19 publications

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Bioethanol Production from Switchgrass Grown on Coal Fly Ash-amended Soil

Sugar Production Potentials of Some Sweet Sorghum Hybrids Cultivated in Heavy Metals Polluted Soil

Research studies on bio-economic development of Banat region: traditions, actualities, perspectives.

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