Inactivation of simulated aquaculture stream bacteria at low temperature using advanced UVA- and solar-based oxidation methods

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00119219" target="_blank" >RIV/00216224:14310/21:00119219 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.solener.2021.09.029" target="_blank" >https://doi.org/10.1016/j.solener.2021.09.029</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.solener.2021.09.029" target="_blank" >10.1016/j.solener.2021.09.029</a>

Result language

angličtina

Original language name

Inactivation of simulated aquaculture stream bacteria at low temperature using advanced UVA- and solar-based oxidation methods

Original language description

In this work the effect of water temperature (6 ± 1 °C and 22 ± 1 °C) on inactivation of bacteria (104 –106 CFU mL−1; Pseudomonas spp., Aeromonas spp. and Enterobacter spp.) in simulated aquaculture streams (SAS) using UVA based advanced oxidation processes (AOP) (H2O2-assisted UVA; photocatalysis; H2O2-assisted photocatalysis) and solar driven AOPs (H2O2-assisted solar disinfection, SODIS) was studied. Efficiency at 22 °C in terms of inactivation rate was higher using H2O2-assisted photocatalysis (H2O2/UVA-TiO2/polysiloxane) &gt; H2O2-assisted UVA disinfection (UVA/H2O2 – 10 mg L-1) &gt; photocatalysis (UVA-TiO2/polysiloxane) &gt; UVA disinfection. At low temperature (6 °C) the inactivation rate increased with SODIS/H2O2 &gt; SODIS &gt; H2O2-assisted UVA disinfection (UVA/H2O2 – 10 mg L-1) &gt; H2O2-assisted photocatalysis (H2O2/UVA-TiO2/polysiloxane) &gt; photocatalysis (UVA-TiO2/polysiloxane). The main results indicate that the inactivation rates increased when hydrogen peroxide (10 mg L-1) was used during H2O2-assisted UVA disinfection and photocatalysis. In addition, exposure of SAS to hydrogen peroxide for 24 h (in absence of light) at room temperature decreased the subsequent exposure UVA irradiation dose by almost four times. Drastic increase of inactivation rate was observed at low water temperature (6 ± 1 °C) when UVA- and solar-based AOPs were employed compared to 22 ± 1 °C. The treatment with SODIS proved to be more effective in Finland than in Spain. The effect of the low temperature (6 ± 1 °C) was proposed as a critical factor during UVA disinfection (UVA/H2O2 and photocatalysis) that can increase the disinfection rate constant (kmax) by 1.3–5.2 times, leading to a reduction of the treatment costs (€ m−3) by 1.3–3.3 times. The mechanism of observed enhanced disinfection at low water temperature (6 ± 1 °C) when natural solar light and UVA are employed as irradiation sources for UVA/H2O2 and photocatalytic bacteria inactivation was proposed. No regrowth was observed in case of H2O2-assisted AOPs.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Solar Energy

ISSN

0038-092X

e-ISSN

—

Volume of the periodical

227

Issue of the periodical within the volume

October

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

477-489

UT code for WoS article

000701879200006

EID of the result in the Scopus database

2-s2.0-85115152498