Microbial analysis in biogas reactors suffering by foaming incidents

Kougias, Panagiotis; Francisci, Davide De; Treu, Laura; Campanaro, Stefano; Angelidaki, Irini

doi:10.1016/j.biortech.2014.05.080

Cited by 41 publications

(37 citation statements)

References 28 publications

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“…For example, studies based on 16S rRNA gene amplicons managed to identify a high number of microbial members possessing important roles during the anaerobic digestion process expanding the information deposited in public databases (Kougias et al 2014;Luo et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Microbial community changes in methanogenic granules during the transition from mesophilic to thermophilic conditions

Zhu

Kougias

Treu

et al. 2016

Appl Microbiol Biotechnol

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Upflow anaerobic sludge blanket (UASB) reactor is one of the most applied technologies for various high-strength wastewater treatments. The present study analysed the microbial community changes in UASB granules during the transition from mesophilic to thermophilic conditions. Dynamicity of microbial community in granules was analysed using high-throughput sequencing of 16S ribosomal RNA gene amplicons, and the results showed that the temperature strictly determines the diversity of the microbial consortium. It was demonstrated that most of the microbes which were present in the initial mesophilic community were not found in the granules after the transition to thermophilic conditions. More specifically, only members from family Anaerolinaceae managed to tolerate the temperature change and contributed in maintaining the physical integrity of granular structure. On the contrary, new hydrolytic and fermentative bacteria were quickly replacing the old members in the community. A direct result from this abrupt change in the microbial diversity was the accumulation of volatile fatty acids and the concomitant pH drop in the reactor inhibiting the overall anaerobic digestion process. Nevertheless, by maintaining deliberately the pH levels at values higher than 6.5, a methanogen belonging to Methanoculleus genus emerged in the community enhancing the methane production

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Section: Introductionmentioning

confidence: 99%

Microbial community changes in methanogenic granules during the transition from mesophilic to thermophilic conditions

Zhu

Kougias

Treu

et al. 2016

Appl Microbiol Biotechnol

Self Cite

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show abstract

“…and Microthrix sp. (Kougias et al, 2014c), (4) inappropriate mixing pattern (Kougias et al, 2014a), and (5) inappropriate reactor configuration (Li et al, 1996). Addition of an antifoaming agent, strengthening of mixing, and optimal design of the digester are usually used to resolve AD foaming when the system is operated at high OLRs.…”

Section: Analysis Of the Stability Of The Ad Processmentioning

confidence: 99%

Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and cow manure

Dong

Liu²,

Li³

et al. 2015

Bioresource Technology

157

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“…and Microthrix sp. (Kougias et al, 2014c), (4) inappropriate mixing pattern (Kougias et al, 2014a;Subramanian and Pagilla, 2014), and (5) inappropriate reactor configuration (Kendall et al, 2006). Addition of an antifoaming agent, strengthening of mixing, and optimal design of the digester are usually used to resolve AD foaming when the system is operated at high OLRs.…”

Section: Raw Materialsmentioning

confidence: 99%

Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and pig manure

Liu

Liu²,

Li³

et al. 2015

Bioresource Technology

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Microbial analysis in biogas reactors suffering by foaming incidents

Cited by 41 publications

References 28 publications

Microbial community changes in methanogenic granules during the transition from mesophilic to thermophilic conditions

Microbial community changes in methanogenic granules during the transition from mesophilic to thermophilic conditions

Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and cow manure

Effects of feedstock ratio and organic loading rate on the anaerobic mesophilic co-digestion of rice straw and pig manure

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