Factors affecting the acid pretreatment of lignocellulosic biomass: Batch and continuous process

López‐Arenas, Teresa; Rathi, Punit; Ramírez-Jiménez, Edgar; Sales‐Cruz, Mauricio

doi:10.1016/s1570-7946(10)28164-6

Cited by 18 publications

(10 citation statements)

References 7 publications

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“…Hence efficient pre-treatment procedures are required to disrupt these interlinks and expose cellulose and hemicellulose to hydrolytic enzymes for fermentable sugar release. Biological pre-treatment using fungal enzymes has been applied to hydrolyse lignocellulosic biomass, but with a slow degradation rate and a possible consumption of the substrate by the organisms [6]. Acid and alkaline pre-treatments effectively solubilize lignin and hydrolyse hemicellulose but acid causes corrosion to the bioreactor internal structures [6] while alkaline removes uronic acid substitutions on hemicellulose thus reducing the accessibility of hemicellulose to hydrolytic enzymes [7].…”

Section: Introductionmentioning

confidence: 99%

“…Biological pre-treatment using fungal enzymes has been applied to hydrolyse lignocellulosic biomass, but with a slow degradation rate and a possible consumption of the substrate by the organisms [6]. Acid and alkaline pre-treatments effectively solubilize lignin and hydrolyse hemicellulose but acid causes corrosion to the bioreactor internal structures [6] while alkaline removes uronic acid substitutions on hemicellulose thus reducing the accessibility of hemicellulose to hydrolytic enzymes [7]. Microwave radiation and thermal pre-treatment strategies disrupt lignin, reduce the degree of polymerization of biomass and hydrolyse hemicellulose to xylose but with high energy requirement [8].…”

Section: Introductionmentioning

confidence: 99%

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Modelling and optimization of xylose and glucose production from napier grass using hybrid pre-treatment techniques

Mafuleka¹,

Kana²

2015

Biomass and Bioenergy

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling and optimization of xylose and glucose production from napier grass using hybrid pre-treatment techniques

Mafuleka¹,

Kana²

2015

Biomass and Bioenergy

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“…39 On the other hand; the efficiency of pretreatment methods depends on different factors such as composition of lignocellulosic wastes, chemicals, processing time, etc. 40,41 These parameters should be optimized in subsequent experiments for higher lignocellulolytic enzyme yields.…”

Section: Resultsmentioning

confidence: 99%

Peach and Cherry Agroindustrial Wastes: New and Economic Sources for the Production of Lignocellulolytic Enzymes

Akpınar¹,

Ürek

2017

ACSi

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Pleurotus eryngii was incubated on both peach and cherry agroindustrial wastes by solid state fermentation for 30 days without/with pretreatment conditions. The lignocellulosic substrates were pretreated with dilute acid and alkaline solutions, hot water before incubation. The maximum carboxymethyl cellulase and xylanase activities peaked on 3 rd and 5 th days under control conditions of both wastes, respectively. The highest laccase and manganese peroxidase activities reached to their maximum on 17 th day as 2193.06 ± 50.4 UL -1 and 732.73 ± 19.8 UL -1 , respectively. The highest aryl alcohol oxidase activity was obtained as 239.25 ± 7.3 UL -1 in control condition of peach cultures. The used pretreatment methods had generally negative effects on lignocellulolytic enzyme production. The highest lignocellulolytic activities were detected using peach wastes. To results, these wastes could be used as alternative, new and economic energy sources to produce high amounts of lignocellulolytic enzymes.

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“…Acid and alkaline pretreatments effectively solubilize lignin and hydrolyze hemicellulose, but acid causes corrosion to the internal structures of the bioreactor [3] while alkali removes uronic acid substitutions on hemicellulose, reducing the accessibility of hemicellulose to hydrolytic enzymes [4]. The use of steam explosion for biomass pretreatment requires a high energy input and leads to the destruction of the xylan fraction, the formation of toxic and inhibitory phenolic compounds, and incomplete digestion of the lignin-carbohydrate matrix [5].…”

Section: Introductionmentioning

confidence: 99%

“…The ligninolytic enzymes were used for biological pretreatment. However, it is not easy to find the enzyme suitable for this process because slow degradation rates and possible consumption of the substrate by the organisms have been observed [3,6,7]. The optimized operating parameters can reduce the pretreatment time and increase the yield of monomeric sugar at minimal cost.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Biological Pretreatment and Saccharification of Rice Straw by Ligninolytic Enzymes from Panus neostrigosus I9 and Commercial Cellulase

Terasawat

Phoolphundh

2021

JoF

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The utilization of rice straw for biofuel production is limited by its composition. The pretreatment process is required to improve the enzymatic accessibility of polysaccharides in the biomass prior to enzymatic saccharification. In this study, simultaneous biological pretreatment and saccharification (SPS) of rice straw starting from laccase production by Panus neostrigosus I9 was operated in a 2-L fermenter. It was found that fungal physiology was strongly influenced by the agitation, and that the highest laccase production was obtained at an agitation speed of 750 rpm (209.96 ± 0.34 U/L). The dilution rate of 0.05 h−1 was set in continuous fermentation which resulted in laccase activity of 678.49 ± 20.39 U/L, approximately three times higher than that in batch culture. Response surface methodology (RSM) was applied to achieve the condition for maximum percentage of delignification. The maximum percentage of delignification of 45.55% was accomplished after pretreatment of rice straw with laccase enzyme 39.40 U/g rice straw at 43.70 °C for 11.19 h. Reducing sugar of 3.85 ± 0.15 g/L was obtained from the digested rice straw in a SPS reactor, while non-pretreated rice straw gave only 1.13 ± 0.10 g/L within 12 h of incubation. The results indicated that simultaneous biological pretreatment and saccharification (SPS) of rice straw by laccase helped to improve the accessibility of cellulose by cellulolytic enzymes.

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Factors affecting the acid pretreatment of lignocellulosic biomass: Batch and continuous process

Cited by 18 publications

References 7 publications

Modelling and optimization of xylose and glucose production from napier grass using hybrid pre-treatment techniques

Modelling and optimization of xylose and glucose production from napier grass using hybrid pre-treatment techniques

Peach and Cherry Agroindustrial Wastes: New and Economic Sources for the Production of Lignocellulolytic Enzymes

Simultaneous Biological Pretreatment and Saccharification of Rice Straw by Ligninolytic Enzymes from Panus neostrigosus I9 and Commercial Cellulase

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