Simultaneous saccharification and fermentation of cactus pear biomass—evaluation of using different pretreatments

Filho, Pedro F. Souza; Ribeiro, Vitor Troccoli; Santos, Everaldo Silvino dos; Macêdo, Gorete Ribeiro de

doi:10.1016/j.indcrop.2016.05.028

Cited by 42 publications

(24 citation statements)

References 31 publications

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“…This cactus belongs to the Cactaceae family, and is one of the thirtythree large columnar cacti species of South America (see figure 1). There are some studies on cacti of the Cactaceae family [36][37][38] , but, as far as we know, this is the first report on obtaining nanocellulose from a cactus. In this paper, we perform the structural characterization and thermal stability determination of crystalline cellulose nanofibers obtained from the Cereus Forbesii bark.…”

Section: Introductionmentioning

confidence: 96%

Characterization of Nanocellulose Obtained from Cereus Forbesii (a South American cactus)

et al. 2019

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Crystalline cellulose nanofibers are obtained from the bark of Cereus Forbesii, a cactus native to the arid areas of South America. The obtaining of cellulose nanofibers was carried out in several steps: pretreatment of the raw material, elimination of hemicellulose and lignin to obtain cellulose, and an acid hydrolysis of cellulose to obtain crystalline cellulose nanofibers. The cellulose nanofibers obtained have a crystallinity index of 82% and a nanofiber diameter of 18 nm. An average crystallite size of 6 nm was calculated for the crystalline domains that form cellulose nanofibers. The high crystallinity of the obtained cellulose nanofibers makes the sample very homogeneous and decomposes in a relatively narrow temperature range (between 290°C and 375°C). The complete degradation of crystalline cellulose polymer chains takes place between 375°C and 600°C. The morphological and structural studies are carried out by scanning electron microscopy of field emission, infrared spectrometry with Fourier transform, and powder X-ray diffraction. The thermal stability of the samples is determined by thermogravimetric analysis.

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Section: Introductionmentioning

confidence: 96%

Characterization of Nanocellulose Obtained from Cereus Forbesii (a South American cactus)

et al. 2019

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“…The cactus forage employs CAM (Crassulacean Acid Metabolism) and photosynthetic metabolism, with day closure of stomata and nocturnal carbon assimilation, thus providing a greater capacity to adapt to abiotic factors (Santos et al, 2016;Souza Filho, Ribeiro, Santos, & Macedo, 2016). The number of stomata in the cladodes is low, 10 to 30 per mm 2 , while the leaves of C3 plants present 300 stomata per mm 2 .…”

Section: Introductionmentioning

confidence: 99%

Estimating the area and weight of cactus forage cladodes using linear dimensions

et al. 2020

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The forage palm is one of the main forages of ruminants in semiarid regions. Measurements of leaf area are required in agronomic studies because they are one of the main parameters used to evaluate plant growth. The objective of this study was to validate and define the best models for estimating the area and weight of Giant Sweet clone (Nopalea cochenillifera) forage cladodes in a non-destructive way based on the linear dimensions of length, width and thickness. There were 432 randomly measured cladodes at 550 days after planting. The length, width and thickness of each cladode were measured using a digital calliper. The cladodes were weighed individually. The cladode area was calculated by the gravimetric method. The power regression model was the most efficient method to explain the cladode area as a function of the product of length by width, while the gamma model was the most efficient method to explain the weight of cladodes as a function of the product of length by width and thickness. The power model, and gamma model, = 0.536T + 0.028LW, were used to determine the area and weight of Nopalea cochenillifera Giant Sweet clone cladodes, respectively, based on the values of linear dimensions measured independently of the order of the cladode.

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“…Recently, there has been increasing interest in the use of the OFI biomass as a substrate for anaerobic digestion and bioethanol production (de Souza Filho et al, 2016; Haladová et al, 2011; Jigar et al, 2011; Obach and Lemus, 2006; Ortiz-Laurel et al, 2014; Ramos-Suárez et al, 2014; Santos do Nascimento et al, 2016; Yang et al, 2015). The main sources of such biomass are from the pruning of prickly pear orchards.…”

Section: Introductionmentioning

confidence: 99%

Effect of three pretreatment techniques on the chemical composition and on the methane yields of Opuntia ficus-indica (prickly pear) biomass

et al. 2017

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Opuntia ficus-indica (OFI) is an emerging biomass that has the potential to be used as substrate in anaerobic digestion. The goal of this work was to investigate the effect of three pretreatment techniques (thermal, alkaline, acidic) on the chemical composition and the methane yield of OFI biomass. A composite experimental design with three factors and two to three levels was implemented, and regression modelling was employed using a total of 10 biochemical methane potential (BMP) tests. The measured methane yields ranged from 289 to 604 NmL/gVS; according to the results, only the acidic pretreatment (HCl) was found to significantly increase methane generation. However, as the experimental values were quite high with regards to the theoretical methane yield of the substrate, this effect still needs to be confirmed via further research. The alkaline pretreatment (NaOH) did not noticeably affect methane yields (an average reduction of 8% was recorded), despite the fact that it did significantly reduce the lignin content. Thermal pretreatment had no effect on the methane yields or the chemical composition. Scanning electron microscopy images revealed changes in the chemical structure after the addition of NaOH and HCl. Modelling of the cumulated methane production by the Gompertz modified equation was successful and aided in understanding kinetic advantages linked to some of the pretreatments. For example, the alkaline treatment (at the 20% dosage) at room temperature resulted to a μ (maximum specific methane production rate [NmLCH/(gVS·d)]) equal to 36.3 against 18.6 for the control.

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Simultaneous saccharification and fermentation of cactus pear biomass—evaluation of using different pretreatments

Cited by 42 publications

References 31 publications

Characterization of Nanocellulose Obtained from Cereus Forbesii (a South American cactus)

Characterization of Nanocellulose Obtained from Cereus Forbesii (a South American cactus)

Estimating the area and weight of cactus forage cladodes using linear dimensions

Effect of three pretreatment techniques on the chemical composition and on the methane yields of Opuntia ficus-indica (prickly pear) biomass

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