TY - JOUR
T1 - Density-dependent microbial calcium carbonate precipitation by drinking water bacteria via amino acid metabolism and biosorption
AU - Liu, Xiaoxia
AU - Zarfel, Gernot
AU - van der Weijden, Renata
AU - Loiskandl, Willibald
AU - Bitschnau, Brigitte
AU - Dinkla, Inez J.T.
AU - Fuchs, Elmar C.
AU - Paulitsch-Fuchs, Astrid H.
PY - 2021/9/1
Y1 - 2021/9/1
N2 - 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.
AB - 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.
KW - Biofilm
KW - Drinking water bacteria
KW - DWDS
KW - MCP
KW - Opportunistic pathogen
KW - Scale
U2 - 10.1016/j.watres.2021.117444
DO - 10.1016/j.watres.2021.117444
M3 - Article
AN - SCOPUS:85111004362
SN - 0043-1354
VL - 202
JO - Water Research
JF - Water Research
M1 - 117444
ER -