Comparing activated carbon of different particle sizes on enhancing methane generation in upflow anaerobic digester

Xu, Suyun; He, Chunnian; Luo, Liwen; Lü, Fan; Cui, Lifeng

doi:10.1016/j.biortech.2015.08.018

Cited by 182 publications

(69 citation statements)

References 30 publications

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“…The addition of activated carbon to anaerobic digesters has been evaluated by Xu et al [34]. These authors reported the use of this adsorbent with different particle sizes, reporting an enhancement of methane production associated with the benefits caused by syntrophic metabolism of alcohol and VFAs.…”

Section: Resultsmentioning

confidence: 99%

“…The study by Xu et al [34] on the use of activated carbon in anaerobic digesters reported the development of a layered structure of the anaerobic sludge granule, where the outer layer was dominated by Bacteria and the inner one by Archaea . These authors also attributed the improvement in digester performance to the increased microbial population of methanogenic bacteria and syntrophic metabolism bacteria.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing anaerobic digestion of poultry blood using activated carbon

Cuetos

Martínez

Moreno

et al. 2017

Journal of Advanced Research

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhancing anaerobic digestion of poultry blood using activated carbon

Cuetos

Martínez

Moreno

et al. 2017

Journal of Advanced Research

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“…Interestingly, it appears that conductive materials, including graphite particles (Kato et al, 2012b;Zhao et al, 2015), granular activated carbon Rotaru et al, 2014a;Xu et al, 2015;Dang et al, 2016;Lee et al, 2016), biochar Zhao et al, 2015;, graphene (Tian et al, 2017), carbon nanotubes (CNT) (Li et al, 2015b;Zhang and Lu, 2016), carbon felt (Xu et al, 2016) and carbon cloth (Chen et al, 2014b;Zhao et al, 2015;Lei et al, 2016), but also iron oxides as magnetite (Kato et al, 2012a;Cruz Viggi et al, 2014;Baek et al, 2015;Zhuang et al, 2015a,b;Yamada et al, 2015;Tang et al, 2016;Yang et al, 2016;Yin et al, 2017;Zhang and Lu, 2016;Jing et al, 2017) may increase the rate of electron transfer and may affect metabolic pathways in anaerobic microbial processes by promoting DIET, between bacteria and methanogens. In general, these materials are highly stable, have large surface area, good adsorption capacity and high electric conductivity (Figueiredo et al, 1999;Van der Zee and Cervantes, 2009;Pereira et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes accelerate methane production in pure cultures of methanogens and in a syntrophic coculture

Salvador

Martins

Melle‐Franco

et al. 2017

Environmental Microbiology

131

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Carbon materials have been reported to facilitate direct interspecies electron transfer (DIET) between bacteria and methanogens improving methane production in anaerobic processes. In this work, the effect of increasing concentrations of carbon nanotubes (CNT) on the activity of pure cultures of methanogens and on typical fatty acid-degrading syntrophic methanogenic coculture was evaluated. CNT affected methane production by methanogenic cultures, although acceleration was higher for hydrogenotrophic methanogens than for acetoclastic methanogens or syntrophic coculture. Interestingly, the initial methane production rate (IMPR) by Methanobacterium formicicum cultures increased 17 times with 5 g·L CNT. Butyrate conversion to methane by Syntrophomonas wolfei and Methanospirillum hungatei was enhanced (∼1.5 times) in the presence of CNT (5 g·L ), but indications of DIET were not obtained. Increasing CNT concentrations resulted in more negative redox potentials in the anaerobic microcosms. Remarkably, without a reducing agent but in the presence of CNT, the IMPR was higher than in incubations with reducing agent. No growth was observed without reducing agent and without CNT. This finding is important to re-frame discussions and re-interpret data on the role of conductive materials as mediators of DIET in anaerobic communities. It also opens new challenges to improve methane production in engineered methanogenic processes.

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“…The complimentary DNA (cDNA) was synthesized by the reverse transcription kit (Thermo, USA). The 16S rRNA gene was amplified from DNA and cDNA with the universal primers 515F (5 0 -GTGCCAGCM GCCGCGGTAA-3 0 ) and 806R (5 0 -GGACTACHVGGGTWTCTAAT-3 0 ) (for both bacteria and archaea) (Xu et al, 2015). Two parallel 25 lL PCR reactions were conducted, and the PCR products were pooled for purification using electrophoresis.…”

mentioning

confidence: 99%