Microbiological study of two-stage anaerobic digestion during start-up

G. K. Anderson; B. Kasapgil; O. Ince

doi:10.1016/0043-1354(94)90054-X

Microbiological study of two-stage anaerobic digestion during start-up

G. K. Anderson^*, B. Kasapgil, O. Ince

^*Corresponding author for this work

Newcastle University

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

The changes in the microbial population of a two-stage anaerobic digestion system in terms of number and composition were studied during the start-up phase. The numbers of methanogens and non-methanogens slightly decreased in the upflow filter, whereas in the pre-acidification stage the number of acidogens was reasonably constant. Variations in the morphology of the methanogens occurred along the filter, for example the numbers of Methanosarcina and filamentous bacteria species decreased considerably in the drain, possibly becoming attached to the biofilm along the reactor, whereas in the pre-acidification stage only a few Methanosarcina species were identified. Slight variations within the bacterial populations occurred in terms of composition and numbers in the filter. The number of viable methanogens varied in the filter effluent depending on the OLR changes but this did not adversely affect the COD removal efficiency of the upflow filter. Among the autofluorescent methanogenic population, Methanococcus, Methanobacterium, Methanobrevibacteria, and Methanosarcina species were tentatively identified in the filter.

Original language	English
Pages (from-to)	2383-2392
Number of pages	10
Journal	Water Research
Volume	28
Issue number	11
DOIs	https://doi.org/10.1016/0043-1354(94)90054-X
Publication status	Published - Nov 1994
Externally published	Yes

Funding

Acknowledgements--The authors would like to acknowledge the support of the University of Newcastle upon Tyne, in particular the Environmental Engineering Group which has allowed the use of its facilities for this study. Bahar Kasapgil would like to acknowledge to Turkish Ministry of Education and Sport for the financial support and expresses her gratitude to METU, Turkey, for the encouragement through these studies. Orhan Ince would also like to express his deep gratitude to Istanbul Technical University, Environmental Engineering Department, Turkey, for their full support.

Funders	Funder number
METU
Ministry of Sports and Education

Keywords

anaerobic upflow filter
bacterial composition
contact digester
enumeration
methanogenic bacteria
two-phase anaerobic digestion

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abstract = "The changes in the microbial population of a two-stage anaerobic digestion system in terms of number and composition were studied during the start-up phase. The numbers of methanogens and non-methanogens slightly decreased in the upflow filter, whereas in the pre-acidification stage the number of acidogens was reasonably constant. Variations in the morphology of the methanogens occurred along the filter, for example the numbers of Methanosarcina and filamentous bacteria species decreased considerably in the drain, possibly becoming attached to the biofilm along the reactor, whereas in the pre-acidification stage only a few Methanosarcina species were identified. Slight variations within the bacterial populations occurred in terms of composition and numbers in the filter. The number of viable methanogens varied in the filter effluent depending on the OLR changes but this did not adversely affect the COD removal efficiency of the upflow filter. Among the autofluorescent methanogenic population, Methanococcus, Methanobacterium, Methanobrevibacteria, and Methanosarcina species were tentatively identified in the filter.",

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AB - The changes in the microbial population of a two-stage anaerobic digestion system in terms of number and composition were studied during the start-up phase. The numbers of methanogens and non-methanogens slightly decreased in the upflow filter, whereas in the pre-acidification stage the number of acidogens was reasonably constant. Variations in the morphology of the methanogens occurred along the filter, for example the numbers of Methanosarcina and filamentous bacteria species decreased considerably in the drain, possibly becoming attached to the biofilm along the reactor, whereas in the pre-acidification stage only a few Methanosarcina species were identified. Slight variations within the bacterial populations occurred in terms of composition and numbers in the filter. The number of viable methanogens varied in the filter effluent depending on the OLR changes but this did not adversely affect the COD removal efficiency of the upflow filter. Among the autofluorescent methanogenic population, Methanococcus, Methanobacterium, Methanobrevibacteria, and Methanosarcina species were tentatively identified in the filter.

KW - anaerobic upflow filter

KW - bacterial composition

KW - contact digester

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Microbiological study of two-stage anaerobic digestion during start-up

Abstract

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Keywords

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