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The limitations of hydrodynamic removal of biofilms from the dead-ends in a model drinking water distribution system
Simunič, Urh (Avtor), Pipp, Peter (Avtor), Dular, Matevž (Avtor), Stopar, David (Avtor)

URLURL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0043135420303754?via%3Dihub Povezava se odpre v novem oknu
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Izvleček
Biofilm formation and removal from dead-ends is a particularly difficult and understudied area of water distribution system biology. In this work, we have built a model drinking water distribution system to probe the effect of different hydrodynamic flow regimes on biofilm formation and removal in the main pipe and in the dead-end. The test rig was built to include all major drinking water distribution system components with materials and dimensions used in standard plumbing systems. We have simulated the effect of stagnant, laminar, turbulent, and intense turbulent flushing conditions on the growth and removal of biofilms from the main pipe and the dead-end. The growth of the biofilm in the main pipe was not prevented at a volumetric flow rate of 9.4 L min−1 and flow velocity of 2 m s−1. Mature biofilms were more difficult to remove. Biofilms grown under shear stress conditions could withstand significantly higher shear stresses than those to which they were exposed to during growth. The biofilms grew twice as fast in the dead-end when flow in the main pipe was turbulent compared to stagnant conditions. Biofilms in the dead-end were not affected by the flushing conditions in the main pipe (Q = 52 L min−1, Re = 9.0 · 104). The computational fluid dynamics simulation suggests that biofilms cannot be hydrodynamically removed from the dead-end at depths that are larger than one pipe diameter. Biofilms beyond this limit present a possible source for reinoculation and recolonization of the rest of the water distribution system.

Jezik:Angleški jezik
Ključne besede:biofilm control, drinking water distribution systems, hydrodynamic flow, dead-ends, escherichia coli
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2020
Datum objave članka:01.07.2020
Št. strani:Str. 1-13
Številčenje:Vol. 178
UDK:579.842.1/.2:621.643
ISSN pri članku:0043-1354
DOI:10.1016/j.watres.2020.115838 Povezava se odpre v novem oknu
COBISS.SI-ID:12956163 Povezava se odpre v novem oknu
Število ogledov:134
Število prenosov:17
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Gradivo je del revije

Naslov:Water research
Skrajšan naslov:Water res.
Založnik:Elsevier
ISSN:0043-1354
COBISS.SI-ID:26617344 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0401
Naslov:Energetsko strojništvo

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P4-0116
Naslov:Mikrobiologija in biotehnologija živil in okolja

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:J1-8156
Naslov:Stabilni izotopi pri študiju vpliva naraščajoče koncentracije CO2 na kroženje C in Hg v obalnem morju

Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:01.07.2020

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:nadzor biofilmov, modelni vodovodni sistemi, tokovne razmere, hidrodinamični tok, mrtvi rokavi, E. coli

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