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Polish Journal of Microbiology
Volume 67 (2018): Numero 1 (January 2018)
Accesso libero
A Low-Tech Bioreactor System for the Enrichment and Production of Ureolytic Microbes
Masataka Aoki
Masataka Aoki
,
Takuya Noma
Takuya Noma
,
Hiroshi Yonemitsu
Hiroshi Yonemitsu
,
Nobuo Araki
Nobuo Araki
,
Takashi Yamaguchi
Takashi Yamaguchi
e
Kazuyuki Hayashi
Kazuyuki Hayashi
| 09 mar 2018
Polish Journal of Microbiology
Volume 67 (2018): Numero 1 (January 2018)
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Article Category:
original-paper
Pubblicato online:
09 mar 2018
Pagine:
59 - 65
Ricevuto:
16 mag 2017
Accettato:
27 set 2017
DOI:
https://doi.org/10.5604/pjm-2018-6144
Parole chiave
DHS bioreactor system
,
enrichment culture
,
microbially induced carbonate precipitation (MICP)
,
ureolytic microbes
© 2021 Masataka Aoki et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Fig. 1.
Schematic diagram of the down-flow hanging sponge bioreactor system used in this study.
Fig. 2.
Time course changes in the potential urease activity of down-flow hanging sponge bioreactor enrichments.The standard errors of the mean of potential urease activity values (n = 3) were smaller than the size of the filed circles; therefore, they are not shown.
Fig. 3.
Time-course changes in the pH (●) and oxidation-reduction potential (ORP; ☐) values of the effluent from the down-flow hanging sponge bioreactor.
Fig. 4.
Scatter plot of potential urease activities and biomass concentrations observed in the down-flow hanging sponge bioreactor enrichments.The numbers associated with the filled circles are the sampling times for the bioreactor enrichments. The error bars are the standard error of the mean (n = 3), and filed circle symbols without error bars have standard errors that are smaller than the size of the circle.
Fig. 5.
Fluorescence in situ hybridization analysis.(A) and (B) Representative photomicrographs of a down-flow hanging sponge bioreactor enrichment collected on day 130 after in situ hybridization with the phylum Firmicutes-targeted LGC354mix probe. Photomicrographs of DAPI-stained cells (A) and the LGC354mix-stained cells (B) in an identical field. Scale bars = 10 μm [in (A) and (B)]. (C) Detection rates (% DAPI-stained cells) of EUB338mix and LGC354mix probe-targeted microbial populations in down-flow hanging sponge bioreactor enrichments. The error bars in (C) are the standard error of the mean from 10 different microscopic fields.
Fig. 6.
Mineralogy and surface morphology of precipitates obtained by a down-flow hanging sponge bioreactor enrichment collected on day 105.(A) X-ray diffraction pattern of the induced precipitates. The peaks marked with filled circles arose from calcite. (B)-(D) Representative scanning electron microscopy images of the induced precipitates. (B) Dodecahedron-like crystals. (C) A cluster of hexahedral-like crystals. (D) A cluster of irregular-shaped crystals. Scale bar = 10 μm [in (B)−(D)].
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