Effect of steam explosion pre-treatment on methane generation from Ludwigia grandiflora

Bhatia, Pranshu; Fujiwara, Masaaki; Ban, Syuhei; Toda, Tatsuki

doi:10.1016/j.biombioe.2020.105771

Cited by 16 publications

(7 citation statements)

References 52 publications

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“…The cellulose and lignin values in the untreated L. grandiflora were 32.83 ± 0.5 and 25.22 ± 4.6%TS, respectively, whereas hemicellulose was not detected. Higher lignin content was obtained in a study conducted on L. grandiflora [7]. After the pretreatment, the cellulose value decreased to 28.02 ± 0.2%TS, and the lignin value increased to 29.15 ± 0.5%TS.…”

Section: Mass Balance and Chemical Composition Of The Untreated And Pretreated Substrate And Effluentmentioning

confidence: 84%

“…The solid and liquid fractions were collected separately due to the mechanism of the SE equipment. A conventional type of SE equipment was used by [7] in which the sample is collected in the form of slurry. The heating method used in this study was by supplying high-temperature steam instead of boiling the substrate at a specific temperature.…”

Section: Mass Balance and Chemical Composition Of The Untreated And Pretreated Substrate And Effluentmentioning

confidence: 99%

“…Ludwigia grandiflora is an emergent invasive lignocellulosic aquatic weed that has caused several social, economic and ecological problems worldwide owing to its overgrowth [7]. L. grandiflora is commonly referred to as water primrose.…”

Section: Introductionmentioning

confidence: 99%

“…Various pretreatments, including physical, chemical, thermal and biological pretreatments, help in the delignification of rigid lignocellulosic structures [14]. Several factors must be considered while selecting an efficient pretreatment, such as the applicability of the biomass, maximum carbohydrate recovery, production of minimum inhibitors and minimum use of chemicals [7]. Moreover, it should be readily applicable to industrial purposes, making it economically stable [6].…”

Section: Introductionmentioning

confidence: 99%

“…The effect of SE pretreatment on the AD of different biomasses has been primarily investigated in the batch mode [20][21][22][23][24]. For instance, when biomethane potential tests of L. grandiflora were performed [7], methane production was found to have increased 3.2-fold compared with that of untreated biomass. In a study by [25], grape pomace AD was performed using batch and continuous digesters.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Semi-Continuous Anaerobic Digestion on the Substrate Solubilisation of Lignin-Rich Steam-Exploded Ludwigia grandiflora

et al. 2021

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In this study, semi-continuous anaerobic digestion of lignin-rich steam-exploded Ludwigia grandiflora (Lignin = 25.22% ± 4.6% total solids) was performed to understand better the effect of steam explosion on the substrate solubilisation and inhibitors formation during the process. Steam explosion pretreatment was performed at 180 °C for 30 min at a severity factor of 3.8 to enhance the biogas yield of the lignocellulosic biomass. The semi-continuous anaerobic digestion was performed in a continuously stirred tank reactor for 98 days at an initial hydraulic retention time of 30 days and an organic loading rate of 0.9 g-VS L−1day−1. The performed steam explosion pretreatment caused biomass solubilisation, resulting in enhanced biogas production during the process. During the anaerobic digestion process, the average biogas yield was 265 mL g-VS−1, and the pH throughout the operation was in the optimum range of 6.5–8.2. Due to fluctuations in the biogas yield, the hydraulic retention time and organic loading rate were changed on day 42 (50 days and 0.5 g-VS L−1day−1) and on day 49 (40 days and 0.7 g-VS L−1day−1), and 1 M of NaOH was added to the liquid fraction of the steam-exploded L. grandiflora during the latter part of the operation to maintain the stability in the reactor. Therefore, the steam explosion pretreatment helped in the degradation of L. grandiflora by breaking the lignocellulose structure. In addition, changes in the operating conditions of the anaerobic digestion led to an increase in the biogas production towards the end of the process, leading to the stability in the CSTR.

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Section: Mass Balance and Chemical Composition Of The Untreated And Pretreated Substrate And Effluentmentioning

confidence: 84%

Section: Mass Balance and Chemical Composition Of The Untreated And Pretreated Substrate And Effluentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%