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Behaviors of nitrifiers in a novel biofilm reactor employing hangingsponge-cubes as attachment site
- Source :
-
Water Science & Technology . 1999, Vol. 39 Issue 7, p23. 0p. - Publication Year :
- 1999
-
Abstract
- Fluorescence in-situ hybridization (FISH) and DO microelectrodes were applied to biofilms developed in a novel reactor named DHS (downflow hanging sponge-cubes), to investigate the mechanisms of simultaneous carbon removal and nitrification. The DHS reactor was employed as an aerobic post-treatment process after an UASB anaerobic pre-treatment process receiving a municipal sewage. The presence ratio of Nitrosomonas and Nitrobacter cells to total cells of the DHS biomass was estimated by FISH technique to be 1.4% and 0.18%, respectively. Cell concentrations of both nitrifying bacteria were in good agreement with the magnitudes of ammonia-oxidizing and nitrite-oxidizing activities evaluated from batch tests. The habitats of both nitrifiers were the interior space of sponge-cubes, rather than within the biofilms attached onto sponge-cube surfaces. DO microelectrodes verify that the sponge-cubes insides were kept aerobically throughout the whole reactor height excluding the inlet vicinity portion. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITRIFYING bacteria
*MICROBIAL ecology
*WASTEWATER treatment
Subjects
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 39
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 8405817
- Full Text :
- https://doi.org/10.2166/wst.1999.0319