Biological pretreatment enhances the activity of functional microorganisms and the ability of methanogenesis during anaerobic digestion

Zhao, Yingying; Xu, Congfeng; Ai, Shiqi; Wang, Haipeng; Gao, Yamei; Yan, Lei; Mei, Zili; Wei-dong, Wang

doi:10.1016/j.biortech.2019.121660

Cited by 67 publications

(26 citation statements)

References 46 publications

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“…where the degradation of the surface and of the physico-chemical structure was not really as on Myrothecium verrucaria (MV). Similar results were obtained or observed in [14 ] , [15 ] , [ 16] , [ 17] , [ 18], [ 19] , [20 ].…”

Section: Discussionsupporting

confidence: 90%

The Effects of <em>Myrothecium verrucaria</em> (MV) on Corn Stover During Co-Composting Process Under Room Temperature Conditions

Hopla¹,

Yao²,

Lei³

et al. 2021

Preprint

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In China, the production of crop straw has been estimated to be approximately 800 Million tons yearly of which about 40% was burned. Corn stover is one of the main agricultural wastes in China. It has shown that lignin in corn stover could be effectively removed byMyrothecium verrucaria. The effects of the pretreatment of corn strover by Myrothecium verrucaria on compost were studied. The results showed that corn stover pretreatment by Myrothecium verrucaria, the Cellulose, Hemicellulose, and lignin were degraded and the results were 33.43%, 11.53% and 18.70% respectively. Scanning electron microscope (SEM) analysis showed that the surface structure of corn stover was changed. Fourier transform infrared spectroscopy (FTIR) analysis showed that the degradation products of lignin were increased. The exposed area of cellulose and hemicellulose was increased. Compared with the control group, the pH value was stable and the temperature was higher. The content of nitrogen in the material decreased, while the contents of total phosphorus and total potassium increased.The C/N ratio of materials decreased after composting.The results showed that the pretreatment of Myrothecium verrucaria improve the degradation of lignocelluloses, a great contribution was made to reduce the causes loss of plant nutrient and to fight against environmental pollution.

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Section: Discussionsupporting

confidence: 90%

The Effects of <em>Myrothecium verrucaria</em> (MV) on Corn Stover During Co-Composting Process Under Room Temperature Conditions

Hopla¹,

Yao²,

Lei³

et al. 2021

Preprint

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“…In 2019, Zhao et al [70] demonstrated that BP enhances the hydrolytic ability of microbial populations and the production of biogas during AD. The corn stover was pretreated with a microbial consortium (BYND-9), which led to an increase of 62.85% compared to the control.…”

Section: Microbial Consortiamentioning

confidence: 99%

“…Methanosarcina (5.21%) was the predominant archaea in the untreated stover, and Methanosaeta (10.82%) was the most active in the BP. This is relevant, because of methanogenic archaea, Methanosaeta characterized by the property of capturing acetic acid, can significantly increase the methane production [70].…”

Section: Microbial Consortiamentioning

confidence: 99%

Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

et al. 2020

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The pretreatment of lignocellulosic biomass (LC biomass) prior to the anaerobic digestion (AD) process is a mandatory step to improve feedstock biodegradability and biogas production. An important potential is provided by lignocellulosic materials since lignocellulose represents a major source for biogas production, thus contributing to the environmental sustainability. The main limitation of LC biomass for use is its resistant structure. Lately, biological pretreatment (BP) gained popularity because they are eco-friendly methods that do not require chemical or energy input. A large number of bacteria and fungi possess great ability to convert high molecular weight compounds from the substrate into lower mass compounds due to the synthesis of microbial extracellular enzymes. Microbial strains isolated from various sources are used singly or in combination to break down the recalcitrant polymeric structures and thus increase biogasgeneration. Enzymatic treatment of LC biomass depends mainly on enzymes like hemicellulases and cellulases generated by microorganisms. The articles main purpose is to provide an overview regarding the enzymatic/biological pretreatment as one of the most potent techniques for enhancing biogas production.

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“…Methanosaeta was the dominant methanogen in the cattle manure fermentation (Gao et al 2017). The activity of Methanosaeta increased from 2.0% to 10.1%, which significantly enhanced the ability of the community to capture acetic acid and reduce CO2 to methane with biological pretreatment (Zhao et al 2019). Methanobacterium, a type of hydrogenotrophic methanogen, was only found at the second HRT.…”

Section: Phylogenetic Analysis For 16s Rrna Of Archaea In Biofilm and Digestatementioning

confidence: 99%

Anaerobic digestion of dairy manure in a fixed bed CSTR: Methane production performance and microbial diversity

Wang

Zhao

Anyi

et al. 2020

BioRes

Self Cite

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To improve the fixed bed and continuous stirred-tank reactor (CSTR) technology relative to the rate of treatment of dairy manure (DM), a continuous stirred tank-treated DM with immobilized carrier biofilm was investigated for 20 days (hydraulic retention time (HRT) was 10 d). Methane productivity, biofilm characteristics, and microbial diversities of the biofilm and digestate were measured. The highest content of extracellular polymeric substances (EPS), proteins, and polysaccharides occurred at 15 days of digestion. An agglomeration phenomenon was observed using a scanning electron microscope on the biofilm. This indicated that the biofilm consisting of EPS was stable during the second HRT. Microbial diversities in digestate and carrier biofilm were characterized using a 16S rRNA sequencing technique. Results showed that the dominant bacterial communities were Pseudomonas (17% to 26%), Clostridium (13% to 21%), and Bacteroidetes (7% to 16%), while the archaea communities were Methanocorpusculum (25% to 37%), Methanosarcina (15% to 33%), Methanoculleus (11% to 15%), and Methanosaeta (13% to 18%). The methane production rate was significantly correlated with bacterial communities (Pseudomonas, Clostridium, Altererythrobacter atlanticus), archaeal communities (Methanosarcina, Methanoculleus, Methanosaeta, and Methanoplanus), and biofilm characteristics (chemical oxygen demand (COD) and EPS). These findings showed that a carrier biofilm could efficiently increase methane production.

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Biological pretreatment enhances the activity of functional microorganisms and the ability of methanogenesis during anaerobic digestion

Cited by 67 publications

References 46 publications

The Effects of <em>Myrothecium verrucaria</em> (MV) on Corn Stover During Co-Composting Process Under Room Temperature Conditions

The Effects of <em>Myrothecium verrucaria</em> (MV) on Corn Stover During Co-Composting Process Under Room Temperature Conditions

Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

Anaerobic digestion of dairy manure in a fixed bed CSTR: Methane production performance and microbial diversity

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