Enhanced biohydrogen production from nutrient-free anaerobic fermentation medium with edible fungal pretreated rice straw

Sheng, Tao; Zhao, Lei; Gao, Lingfang; Liu, Wenzong; Wu, Guofeng; Wu, Jieting; Wang, Aijie

doi:10.1039/c8ra03361g

Cited by 35 publications

(5 citation statements)

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“…Both the adapted and parental strains reduced the cellulose mass fraction by only about 3%. Similar levels of microbially-induced degradation have been observed by others; for example, using chemical composition analysis of rice straw, Sheng et al (2018) demonstrated that lignin removal was up to 22.4%, and cellulose and hemicellulose loss was 13.3% and 17.1%, respectively [26]. In another study, the relative content of lignin decreased from 22.6% to 17% and 19.8% after biotreatment of corn stover with Trametes hirsute and Myrothecium roridum, respectively [27].…”

Section: Analysis Of Biomass Degradationsupporting

confidence: 74%

“…In conventional physicochemical pretreatment processes, abundant cellulose and hemicellulose loss is inevitable. By comparison, during biological pretreatment, the degradation characteristics of lignocellulose are dependent on the different microbes adopted [26]. The degradation results reported here do appear to demonstrate that the adaptive strain of the Geobacillus sp.…”

Section: Analysis Of Biomass Degradationmentioning

confidence: 49%

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Adaptive Enrichment of a Thermophilic Bacterial Isolate for Enhanced Enzymatic Activity

et al. 2020

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The mimicking of evolution on a laboratory timescale to enhance biocatalyst specificity, substrate utilization activity, and/or product formation, is an effective and well-established approach that does not involve genetic engineering or regulatory details of the microorganism. The present work employed an evolutionary adaptive approach to improve the lignocellulose deconstruction capabilities of the strain by inducing the expression of laccase, a multicopper oxidase, in Geobacillus sp. strain WSUCF1. This bacterium is highly efficient in depolymerizing unprocessed lignocellulose, needing no preprocessing/pretreatment of the biomasses. However, it natively produces low levels of laccase. After 15 rounds of serially adapting this thermophilic strain in the presence of unprocessed corn stover as the selective pressure, we recorded a 20-fold increase in catalytic laccase activity, at 9.23 ± 0.6 U/mL, in an adapted yet stable strain of Geobacillus sp. WSUCF1, compared with the initial laccase production (0.46 ± 0.04 U/mL) obtained with the unadapted strain grown on unprocessed corn stover before optimization. Chemical composition analysis demonstrated that lignin removal by the adapted strain was 22 wt.% compared with 6 wt.% removal by the unadapted strain. These results signify a favorable prospect for fast, cost competitive bulk production of this thermostable enzyme. Also, this work has practical importance, as this fast adaptation of the Geobacillus sp. strain WSUCF1 suggests the possibility of growing industrial quantities of Geobacillus sp. strain WSUCF1 cells as biocatalysts on reasonably inexpensive carbon sources for commercial use. This work is the first application of the adaptive laboratory evolution approach for developing the desired phenotype of enhanced ligninolytic capability in any microbial strain.

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Section: Analysis Of Biomass Degradationsupporting

confidence: 74%

Section: Analysis Of Biomass Degradationmentioning

confidence: 49%

Adaptive Enrichment of a Thermophilic Bacterial Isolate for Enhanced Enzymatic Activity

et al. 2020

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“…For the present composting method, WS, RS, CC, and CS are probably better suited for A. bisporus production, while over-fermentation, or the low N content of C and B will lead to poor production of A. bisporus. Sheng et al (2018) showed that the structure of pretreated RS was severely destroyed, and more cracks and large holes were observed with the extension of fermentation time through scanning electron microscopy(SEM). Shahryari et al (2018) found that high intensity fungal growth led to larger accessible surface area and structural destruction in the wheat straw observed by SEM.…”

Section: Discussionmentioning

confidence: 99%

“…Agricultural straws (AS) are organic agricultural residues produced at a global rate of 2-4 × 10 9 t per year, which is 1.4 times the annual crop yield (Smil, 1999). AS comprise mainly of lignocellulosic biomass, most of which is used for combustion in China (Sheng et al, 2018). Until 2018, the amount of AS had reached 886 million tons in China.…”

Section: Introductionmentioning

confidence: 99%

Bacterial community diversity, lignocellulose components, and histological changes in composting using agricultural straws forAgaricus bisporusproduction

Song

Shen

et al. 2021

PeerJ

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Agricultural straws (AS) may serve as potential base-substances in the production of Agaricus bisporus. Six AS that occur across China were investigated in a two-stage composting experiment; lignocellulose components, AS morphology, and the effects of different AS on mushroom yields from 2015–2017 were examined. In addition, microbial biodiversity and their impact on substrate degradation were studied using 16S gene sequenc based on six different AS on the 3rd (I.F), 6th (I.S), and 10th (I.T) day of Phase I, and Phase II (II). Results showed that the six different AS exhibited differences in the progression of degradation under the same compost condition; the wheat straw, rice straw, and cotton straw induced a significantly higher mushroom yield than did the others (P < 0.05); Thermobispora, Thermopolyspora, and Vulgatibacter genera may play an important role in the different AS degradations. According to our experiments, we can adjust formulations and compost methods to obtain high-yield mushroom compost based on different AS in the future.

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“…The world's largest renewable resource, lignocellulosic biomass consisting primarily of cellulose (30–50%), hemicellulose (20–30%) and lignin (20–30%), has been successfully explored for the production of various value‐added products. Bioconversion of lignocellulosic biomass for the production of biofuels such as ethanol, butanol and biohydrogen has been successfully achieved on a laboratory as well as an industrial scale . Onion is an important vegetable crop cultivated worldwide and has become second topmost horticultural crop.…”

Section: Introductionmentioning

confidence: 99%

Co‐fermentation of agricultural and industrial waste by Naganishia albida for microbial lipid production in fed‐batch fermentation

Sathiyamoorthi

Dikshit

Kumar

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Oleaginous yeast Naganishia albida is well known for its ability to utilize a variety of carbon sources, including lignocellulosic hydrolysates, complex sugars and fatty acids. In this study, crude glycerol derived from the biodiesel industry and onion waste hydrolysate (OWH) were used as potential substrates for microbial lipid production. RESULTS: Both substrates provided sufficient nutrition to support cell growth and lipid production as sole carbon source.Enhanced lipid production and cell growth rate were observed with supplementation of yeast extract as nitrogen source. Co-fermentation of OWH and crude glycerol led to improved biomass as well as lipid production. The highest lipid content of 34.0% (w/w) with 21.1 g L −1 of dry cell weight was obtained after 168 h of fed-batch fermentation with intermittent feeding of crude glycerol and OWH. The lipid concentration was approximately 7 times higher than using mineral medium with crude glycerol as sole carbon source, where a lipid content of 12.6% (w/w) and a maximum biomass of 8.32 g L −1 were obtained at 168 h. CONCLUSION: Optimization of glycerol and OWH feeding could enhance lipid accumulation in N. albida. This study suggests that the co-fermentation of agricultural and industrial waste as substrates can provide a competitive route for single cell oil production.

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Enhanced biohydrogen production from nutrient-free anaerobic fermentation medium with edible fungal pretreated rice straw

Abstract: An edible fungal pretreatment of rice straw was proposed for enhanced hydrogen production while reducing the chemical cost for traditional biological hydrogen production from lignocellulose.

Cited by 35 publications

References 50 publications

Adaptive Enrichment of a Thermophilic Bacterial Isolate for Enhanced Enzymatic Activity

Adaptive Enrichment of a Thermophilic Bacterial Isolate for Enhanced Enzymatic Activity

Bacterial community diversity, lignocellulose components, and histological changes in composting using agricultural straws forAgaricus bisporusproduction

Co‐fermentation of agricultural and industrial waste by Naganishia albida for microbial lipid production in fed‐batch fermentation

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