- 【Updated on May 12, 2025】 Integration of CiNii Dissertations and CiNii Books into CiNii Research
- Trial version of CiNii Research Automatic Translation feature is available on CiNii Labs
- Suspension and deletion of data provided by Nikkei BP
- Regarding the recording of “Research Data” and “Evidence Data”
Ecological Significance of Sulfate-Reducing Bacteria in Anaerobic Degradation of Propionate.
-
- YAMAGUCHI Takashi
- Dept. of Civil Engineering, Kure National College of Tech.
-
- HARADA Hideki
- Dept. of Environmental Systems Engineering, Nagaoka Univ.of Tech.
-
- ARAKI Nobuo
- Dept. of Civil Engineering, Nagaoka National College of Tech.
-
- YAMAZAKI Shinichi
- Dept. of Civil Engineering, Kochi National College of Tech.
-
- TSENG I-Cheng
- Dept. of Biology, National Cheng Kung University, Taiwan
Bibliographic Information
- Other Title
-
- プロピオン酸の嫌気的分解過程における硫酸塩還元細菌の生態学的位置づけの定量的評価
Search this article
Description
The ecological role of sulfate-reducingb acteria (SRB) in anaerobic degradation of propionate was investigated using two UASB reactors operated in parallel under different feed conditions. Both UASB reactors received the identical organic source with asugar-VFA mixture of 2000mgCOD·l-1, but different levels of sulfate: the first one fed with 33mgS02-4-S·l-1 (sulfate poor, referred to as R1), and other one fed with 1000 mgS02-4-S·l-1 (sulfate rich, R2). Microbial activities in terms of methane production, propionate degradation and sulfate reduction were assessed using sludge samples harvested from the respective reactors after over two years operation.C ontributions of syntrophic proton-reducing acetogenic bacteria (PRB) and of SRB inpropionate oxidation into acetate were separately quantified by conducting specific vial-bottle tests, in which cultivation conditions were subsequently alteredaccording to the thermodynamic oncept.<BR>Methanogenesis predominantly occurred in R1 reactor, and sulfate reducers contributed only 3% of the total COD removal. On the other hand, COD reduction in R2 reactor was performed solely by sulfidogenesis, as a consequence of complete inhibition of methanogenesis by high level sulfide. The major contributor of propionate oxidation in R1 sludge consortium wasa symbiosis between PRB and hydrogenotrophic methanogens, while in R2 sludge consortium SRB were the sole contributor.In spite of much less sulfate load some extent of propionate-oxidizing SRB proliferated in R1 sludge consortium.In the presence of sulfate propionate-oxidizing SRB exerted a oxidizing-potential of 0.84 fold as large as by the symbiosis of PRB and MPB. This finding suggests that propionate-oxidizing SRB mostly grew as fermentative bacteria under such low sulfate level as in R1 reactor.
Journal
-
- ENVIRONMENTAL ENGINEERING RESEARCH
-
ENVIRONMENTAL ENGINEERING RESEARCH 35 447-455, 1998
Japan Society of Civil Engineers
- Tweet
Details 詳細情報について
-
- CRID
- 1390282679089325440
-
- NII Article ID
- 130003775775
-
- ISSN
- 1884829X
- 13415115
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- CiNii Articles
-
- Abstract License Flag
- Disallowed
