Abstract:
:A bench-scale granular autotrophic nitrogen removal bioreactor (completely autotrophic nitrogen removal over nitrite (CANON) system) used for the treatment of synthetic wastewater was analyzed for the identification of microbiota with potential capacity for carbonate and phosphate biomineral formation. 16S ribosomal RNA (rRNA) gene-based studies revealed that different bacterial species found in the granular biomass could trigger the formation of phosphate and calcite minerals in the CANON bioreactor. iTag analysis of the microbial community in the granular biomass with potential ability to precipitate calcium carbonate and hydroxyapatite constituted around 0.79-1.32 % of total bacteria. Specifically, the possible hydroxyapatite-producing Candidatus Accumulibacter had a relative abundance of 0.36-0.38 % and was the highest phosphate-precipitating bacteria in the granular CANON system. With respect to calcite precipitation, the major potential producer was thought to be Stenotrophomonas with a 0.38-0.50 % relative abundance. In conclusion, our study showed evidences that the formation of hydroxyapatite and calcite crystals inside of the granular biomass of a CANON system for the treatment wastewater with high ammonium concentration was a biological process. Therefore, it could be suggested that microorganisms play an important role as a precipitation core and also modified the environment due to their metabolic activities.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Gonzalez-Martinez A,Rodriguez-Sanchez A,Rivadeneyra MA,Rivadeneyra A,Martin-Ramos D,Vahala R,Gonzalez-Lopez Jdoi
10.1007/s00253-016-7914-9subject
Has Abstractpub_date
2017-01-01 00:00:00pages
817-829issue
2eissn
0175-7598issn
1432-0614pii
10.1007/s00253-016-7914-9journal_volume
101pub_type
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