Microscopic structure and properties changes of cassava stillage residue pretreated by mechanical activation

Zheng-da, Liao; Huang, Zuqiang; Hu, Huayu; Zhang, Yanjuan; Tan, Yunfang

doi:10.1016/j.biortech.2011.05.067

Cited by 86 publications

(42 citation statements)

References 35 publications

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“…For each milling experiment, native cassava starch sample (80 g in each batch) was added into a stainless steel chamber (1200 mL) with 300 mL zirconia milling balls (6 mmdiameter), then the sample was subjected to dry milling at a fixed temperature of 508C and no other additives were used during milling. The balls were removed after the sample was milled for different designated time (10,20,30,60,90,120,150, and 180 min), then the chamber and milling balls were thoroughly cleaned and dried before the next milling experiment. The resulting samples were sealed in plastic bags and stored in a silica-gel desiccator.…”

Section: Mechanical Activation Of Cassava Starchmentioning

confidence: 99%

“…Currently, MA has been widely used in various fields, such as extractive metallurgy, crystal engineering, nanomatrix composites, agriculture, pharmacy, waste disposal, organic material synthesis, and so on [23][24][25][26]. In our previous studies, MA has been successfully used for the pretreatment of starches, sugarcane bagasse and cassava stillage residue, and the results showed that MA could significantly change the crystalline structures and physicochemical properties of these solid materials and thus enhance their chemical reactivity [27][28][29][30]. Compared to other pretreatment methods, MA is a simple and environmentally friendly procedure relaying on simple and cheap equipment and can be operated without the use of solvents, intermediate fusion, etc.…”

Section: Introductionmentioning

confidence: 99%

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Material properties of partially pregelatinized cassava starch prepared by mechanical activation

et al. 2013

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This study has focused on the preparation of partially pregelatinized cassava starch (PPCS) by mechanical activation (MA) using a customized stirring ball mill. The changes in degree of gelatinization, crystal structure, particle size, surface morphology, powder characteristics, and pasting properties of cassava starch mechanically activated for different time were investigated by various characterizations. The results showed that MA could significantly destroy the crystal structure of starch granules, contributing to the increase of cold-water solubility, flowability, and floodability, the variations of particle size and surface morphology, and the decrease in pasting temperature, viscosity of cooked PPCS paste, breakdown, and setback. It was also found that the PPCS with different degree of gelatinization could be prepared by controlling the milling time. With the unique properties induced by MA, the potential use of PPCS as excipient in pharmaceutical formulations is discussed.

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Section: Mechanical Activation Of Cassava Starchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Material properties of partially pregelatinized cassava starch prepared by mechanical activation

et al. 2013

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“…The crystalline reflections and amorphous halo of samples were defined according to previously described recommendations (Wan et al 2010 andLiao et al 2011). The cellulose crystallinity (%) was calculated by means of the following equation (Kim and Hotzapple 2006),…”

Section: Determination Of Cellulose Crystallinity By X-ray Diffractiomentioning

confidence: 99%

Effects of Different Deinking Processes on Fiber Morphology, Hydrogen Bond Models, and Cellulose Supramolecular Structure

Meng

Wan

et al. 2013

BioResources

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Deinked pulp fibers produced by three kinds of deinking processes, alkaline deinking, neutral deinking, and enzymatic deinking, were studied by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectrometer (FTIR), X-ray Diffraction (XRD), and CrossPolarization Magic Angle Spinning Carbon-13 Nuclear Magnetic Resonance (CP/MAS 13 C-NMR). There were remarkable differences in both macroscopic and microscopic structure between the samples. SEM images showed that the effects of deinking processes on fiber morphology were obvious and the influences of alkaline deinking were the most apparent. FTIR analysis indicated that the content of intermolecular hydrogen bonds increased by 22.63%, 9.42%, and 14.40% after the alkaline deinking process, neutral deinking process, and enzymatic deinking process, respectively. XRD revealed that the average width of crystallite size in the (002) lattice plane was decreased after different deinking processes, in accordance with the change tendency of cellulose crystallinity. CP/MAS 13 C NMR combined with spectral fitting demonstrated that the content of different cellulose polymorphs changed during deinking processes. The increase of WRV was attributed to changes in the hydrogen bonding patterns and cellulose supramolecular structure. Technology, Guangzhou 510640, PR China; c: School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, PR China; *Corresponding author:mwizard@126.com Keywords INTRODUCTIONWith the demand of protecting forest resources and developing a low-carbon economy, secondary fiber recycling has aroused the attention of technologists throughout the world, and the rapid growth of the waste paper utilization has become an important trend of the world's paper industry. According to the statistics of the China Paper Association, the total consumption of pulp from wastepaper in the paper industry was 44.39 million tons in 2008 in China. In 2011 it increased to 56.60 million tons, accounting for 62% of total pulp consumption (China Paper Association). Recycled cellulose fiber accounted for about 70% of the papermaking materials by the end of the 20 th century (Wan and Ma 2004). This recycled material can help make up for an insufficient supply of fresh papermaking raw materials, can reduce energy consumption in comparison to the pulping of wood, and also can play an essential role in decreasing environmental pollution problems. Deinking is an important stage in secondary fiber PEER-REVIEWED ARTICLE bioresources.com Meng et al. (2013). "Hydrogen bonds & deinking," BioResources 8(2), 2398-2416. 2399recycling. Conventional deinking processes often employ sodium hydroxide in combination with a large amount of other chemicals, including sodium silicate, hydrogen peroxide, and surfactants (Shrinath et al. 1991). This high pH and chemical-intensive process leads to several major problems for the process and recycled paper quality, including a high degree of fragmentation of large sticky contaminants, darkening of pu...

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“…As can be seen, there are some advantages and disadvantages for this pretreatment technique. For example, using an agitated ball mills, a solubilization among 10 and 30% and an increase from 10 to 20% in the biogas production can be obtained (Buaban et al, 2010;Liao et al, 2011). On the other hand, main disadvantages for using this technique are the capital and operational costs (Salomoni et al, 2011).…”

Section: Mechanical Pretreatmentmentioning

confidence: 99%

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

Rodrigues¹,

Cruz²,

Souza³

et al. 2018

Afr. J. Biotechnol.

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Bioenergy production from biomass and agricultural wastes has gained significant interest due to rising fossil fuel prices and their decrease in air pollutant emissions. This review paper evaluates the state-of-art for the several applications from cassava harvest residues and their use in bioenergy industry, using different thermochemical and biochemical processes. Regarding the great available literature for this biomass, several pretreatment techniques, including mechanical, chemical, biological, thermal, ultrasonic and wet explosion were observed. The use of cassava harvest residues for the biochemical pretreatments, for example, hydrolysis, fermentation and thermochemical processes, such as direct combustion, gasification, pyrolysis, fast pyrolysis and oxy-fuel combustion was also discussed. Therefore, studies are necessary in order to understand that the use of cassava residues in thermal processes can increase the viability of this feedstock for biofuels production and/or in power co-firing units. After extensive study, it was observed that informations are still lacking about the use of cassava harvest residues in other conversion processes, thus, new studies to discover more on the use of this biomass, in order to extend their application in the bioenergy market is encouraged.

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Microscopic structure and properties changes of cassava stillage residue pretreated by mechanical activation

Cited by 86 publications

References 35 publications

Material properties of partially pregelatinized cassava starch prepared by mechanical activation

Material properties of partially pregelatinized cassava starch prepared by mechanical activation

Effects of Different Deinking Processes on Fiber Morphology, Hydrogen Bond Models, and Cellulose Supramolecular Structure

Application of cassava harvest residues (Manihot esculenta Crantz) in biochemical and thermochemical conversion process for bioenergy purposes: A literature review

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