Ecophysiological interaction between nitrifying bacteria and heterotropic bacteria in autotropic nitrifying biofilms as determined by microautoradiography-fluorescence in situ hybridization

Article Abstract:

A full-cycle 16S rRNA approach and MAR-FISH were used to determine the patterns of utilization of organic matter by the major phylogenetic groups of heterotrophs comprising an autotrophic nitrifying biofilm community to which no organic carbon substrate was added. The hypothesis that such a simple autotrophic nitrifying biofilm is metabolically structured and functionally integrated to maximize the utilization of metabolites of nitrifiers and the stability of the biofilm community is tested.

Genetic aspects, Ribosomal RNA, Genetic research, Bacteria, Nitrifying, Nitrobacteraceae

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Isolation, characterization, and in situ detection of a novel chemolithoautotrophic sulfur-oxidizing bacterium in wastewater biofilms growing under microaerophilic conditions

Article Abstract:

A novel aerobic chemolithotrophic sulfur-oxidizing bacterium, designated strain AO07, from wastewater biofilms growing under microaerophilic conditions is successfully isolated. The use of elemental sulfur, which is the most abundant sulfur pool in the wastewater biofilms, as the electron donor is an effective measure to establish an enrichment culture of strain SO07 and further isolation.

Product information, Testing, Risk factors, Microbiology, Bacteria, Aerobic, Aerobic bacteria, Wastewater

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Succession of internal sulfur cycles and sulfur-oxidizing bacterial communities in microaerophilic wastewater biofilms

Article Abstract:

The succession of sulfur-oxidizing bacterial (SOB) community structure and the complex internal sulfur cycle occurring in wastewater biofilms growing under microaerophilic conditions is analyzed. Microelectrode measurements revealed that active sulfide-oxidizing zones overlapped the spatial distributions of different phylogenetic SOB groups in the biofilms.

Japan, Goods & services distribution, Channels of Distribution, Behavior, Distribution, Sulfur bacteria, Company distribution practices, Sulphur bacteria

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