Density-dependent microbial calcium carbonate precipitation by drinking water bacteria via amino acid metabolism and biosorption

被引：15

作者：

Liu, Xiaoxia ^{[1
,6
]}

Zarfel, Gernot ^{[2
]}

van der Weijden, Renata ^{[1
,4
]}

Loiskandl, Willibald ^{[6
]}

Bitschnau, Brigitte ^{[5
]}

Dinkla, Inez J. T. ^{[1
]}

Fuchs, Elmar C. ^{[1
,7
]}

Paulitsch-Fuchs, Astrid H. ^{[2
,3
]}

机构：

[1] European Ctr Excellence Sustainable Water Technol, Wetsus, Leeuwarden, Netherlands

[2] Med Univ Graz, Diagnost & Res Ctr Mol BioMed, Graz, Austria

[3] Carinthia Univ Appl Sci, Sch Hlth Sci & Social Work, Biomed Sci, Klagenfurt, Austria

[4] Wageningen Univ, Sub Dept Environm Technol, Wageningen, Netherlands

[5] Graz Univ Technol, Inst Phys & Theoret Chem, Graz, Austria

[6] Univ Nat Resources & Life Sci, Inst Hydraul & Rural Water Management, Vienna, Austria

[7] Univ Twente, Fac Sci & Technol, Opt Sci Grp, Twente, Netherlands

来源：

WATER RESEARCH | 2021年 / 202卷

关键词：

MCP; DWDS; Biofilm; Scale; Drinking water bacteria; Opportunistic pathogen; MICROCOCCUS-LUTEUS; MINERALIZATION; RESISTANCE; CORROSION; BIOFILMS; QUALITY; METALS; STRAIN; GROWTH; MODEL;

D O I：

10.1016/j.watres.2021.117444

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Drinking water plumbing systems appear to be a unique environment for microorganisms as they contain few nutrients but a high mineral concentration. Interactions between mineral content and bacteria, such as microbial calcium carbonate precipitation (MCP) however, has not yet attracted too much attention in drinking water sector. This study aims to carefully examine MCP behavior of two drinking water bacteria species, which may potentially link scaling and biofouling processes in drinking water distribution systems. Evidence from cell density evolution, chemical parameters, and microscopy suggest that drinking water isolates can mediate CaCO3 precipitation through previously overlooked MCP mechanisms like ammonification or biosorption. The results also illustrate the active control of bacteria on the MCP process, as the calcium starts to concentrate onto cell surfaces only after reaching a certain cell density, even though the cell surfaces are shown to be the ideal location for the CaCO3 nucleation.

引用

页数：13

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