Microbial activity and community structure in a lake sediment used for psychrophilic anaerobic wastewater treatment

Xing, Weihong; Zhao, Yinan; Zuo, Jiane

doi:10.1111/j.1365-2672.2010.04809.x

Cited by 11 publications

(9 citation statements)

References 29 publications

(53 reference statements)

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“…The requirement for a psychrophilic, or psychrotolerant, inoculum for successful LtAD has been proposed as being advantageous. The use of a truly psychrophilic inoculum (from naturally cold environments) has been tested by Xing, Zhao and Zuo ( 2010 ) and Petropoulos et al. ( 2017 ) with promising results.…”

Section: Introductionmentioning

confidence: 99%

Cold adaptation and replicable microbial community development during long-term low-temperature anaerobic digestion treatment of synthetic sewage

Keating

Hughes

Mahony

et al. 2018

FEMS Microbiology Ecology

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The development and activity of a cold-adapting microbial community was monitored during low-temperature anaerobic digestion (LtAD) treatment of wastewater. Two replicate hybrid anaerobic sludge bed-fixed-film reactors treated a synthetic sewage wastewater at 12°C, at organic loading rates of 0.25–1.0 kg chemical oxygen demand (COD) m−3 d−1, over 889 days. The inoculum was obtained from a full-scale anaerobic digestion reactor, which was operated at 37°C. Both LtAD reactors readily degraded the influent with COD removal efficiencies regularly exceeding 78% for both the total and soluble COD fractions. The biomass from both reactors was sampled temporally and tested for activity against hydrolytic and methanogenic substrates at 12°C and 37°C. Data indicated that significantly enhanced low-temperature hydrolytic and methanogenic activity developed in both systems. For example, the hydrolysis rate constant (k) at 12°C had increased 20–30-fold by comparison to the inoculum by day 500. Substrate affinity also increased for hydrolytic substrates at low temperature. Next generation sequencing demonstrated that a shift in a community structure occurred over the trial, involving a 1-log-fold change in 25 SEQS (OTU-free approach) from the inoculum. Microbial community structure changes and process performance were replicable in the LtAD reactors.

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Section: Introductionmentioning

confidence: 99%

Cold adaptation and replicable microbial community development during long-term low-temperature anaerobic digestion treatment of synthetic sewage

Keating

Hughes

Mahony

et al. 2018

FEMS Microbiology Ecology

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“…Tian et al used pig manure as raw material to carry out low‐temperature biogas fermentation at 15°C and found that Methanobacterium formicicum which can convert CO 2 and H 2 into methane in the methanogenesis stage was the most abundant archaeal species. Xing et al fermented algae as raw material at 15°C and found that hydrogen‐consuming Methanomicrobiales and Methanobacteriaceae were dominant. These findings may be related to the ability of hydrogenotrophic methanogens to adapt to a cold environment.…”

Section: Discussionmentioning

confidence: 99%

Construction of biogas metabolic pathway in a low‐temperature biogas fermentation system

Yang

Yin

Wang

et al. 2019

Energy Science & Engineering

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The main objective of this study was to establish the metabolic pathway of a biogas fermentation system active at low temperature, and to describe the bacterial and archaeal methanogenic species responsible. A biogas fermentation inoculum adapted to be active at 9°C was used in a 10‐L batch‐type temperature‐controlled fermentor, using pig manure as the raw material. Fermentation at 9°C was followed for 120 days. A combination of nonbiological and biological factors was analyzed. Species were identified from OTU analysis based on 16S rDNA amplicon sequencing, and correlation analysis was used to study the effect of nonbiological factors, bacterial communities, and archaea communities. Biogas production was most effective between days 50 and 90, where gas production was above 0.70 L/d and the CH4 yield was above 0.36 L/g‐volatile solid. The relative abundance of the first dominant bacterial OTU with 99% identity to Clostridium cellulovorans varied between 16.17% and 27.30%. These bacteria typically degrade cellulose and hemicellulose. The second dominant bacterial OTU (relative abundance 15.23%‐27.15%) was 99% identical to Terrisporobacter petrolearius, a typical fermentative species. The most abundant (4.15%‐37.14%) archaeal OTU was 98% identical to Methanocorpusculum sinense, which is a typical hydrogenotrophic methanogen. A low‐temperature biogas metabolic pathway was constructed, based on abundant bacterial and methanogen OTUs. The most suitable metabolic pathway describes that hydrogen is produced by one part of the community and then used to reduce the produced carbon dioxide into CH4; this seems to be the major pathway by which biogas is produced under low‐temperature conditions.

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“…El quitosano tiene acción antimicrobiana en alimentos, se ha descrito su acción in vitro sobre patógenos contaminantes de productos cárnicos y cecinas mencionando entre los principales, Escherichia coli, causante de graves complicaciones como la colitis hemorrágica y el síndrome urémico hemorrágico, y que su mayor fuente de infección son los alimentos de origen animal, principalmente carne de vacuno molida y leche cruda , Escherichia coli (Li et al, 2006;Xing et al, 2009); Staphylococcus aureus (Li et al, 2006); Listeria monocito genes (Li et al, 2006, Valbuena et al, 2012.…”

Section: Figura 2 Aplicaciones Generales Del Polímero Quitosanounclassified

Efecto del uso de quitosano en el mejoramiento del cultivo del arroz (Oryza sativa L. variedad sd20a)

Zerpa¹,

Rincón

Rincón³

et al. 2017

rev.investig.agrar.ambient.

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En la actualidad existen alternativas tecnológicas para el aprovechamiento de los desechos de crustáceos y su conversión en productos de utilidad como lo son la quitina y su derivado el quitosano. En esta investigación, se utilizó gel de quitosano para aplicarlo a la variedad de arroz SD20 para mejorar su cultivo. El análisis mediante IR del quitosano utilizado mostró similitud con los espectros para cada una de las muestras, confirmando con estos resultados que la utilización de diferentes quitinas obtenidas por la desmineralización con HCl y H3PO4 no afectó la identidad del producto, pues se mantienen las bandas de los grupos funcionales más importantes, demostrándose así que las quitinas se transformaron en una nueva materia prima como el quitosano. Las plantas tratadas con quitosano presentaron alturas mayores, con incrementos de altura hasta de 16,57% en comparación al testigo. Además, produjo un incremento de la raíz de 52% para los 12 días de siembra en comparación con el testigo. Se observó en las plantas de arroz un color verde más intenso que en lote testigo, estos resultados se deben a la capacidad estimulante del quitosano, ya que actúa mejorando el enraizamiento y la producción de área foliar de la planta. Se encontró una diferencia de 1025 kg/ha, y un incremento en la cosecha de 16,21% con respecto al tratamiento sin quitosano. Se concluye que el cultivo de arroz, variedad SD20A, tuvo un desarrollo vegetativo mejor con el tratamiento con quitosano.

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Microbial activity and community structure in a lake sediment used for psychrophilic anaerobic wastewater treatment

Cited by 11 publications

References 29 publications

Cold adaptation and replicable microbial community development during long-term low-temperature anaerobic digestion treatment of synthetic sewage

Cold adaptation and replicable microbial community development during long-term low-temperature anaerobic digestion treatment of synthetic sewage

Construction of biogas metabolic pathway in a low‐temperature biogas fermentation system

Efecto del uso de quitosano en el mejoramiento del cultivo del arroz (Oryza sativa L. variedad sd20a)

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