Thermophilic waste air treatment of an airborne ethyl acetate/toluene mixture in a bubble column reactor: Stability towards temperature changes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F19%3A43917853" target="_blank" >RIV/60461373:22330/19:43917853 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22330/20:43917853

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0304389419306879?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0304389419306879?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jhazmat.2019.120744" target="_blank" >10.1016/j.jhazmat.2019.120744</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermophilic waste air treatment of an airborne ethyl acetate/toluene mixture in a bubble column reactor: Stability towards temperature changes

Popis výsledku v původním jazyce

Thermophilic waste air treatment in a lab-scale bubble column reactor (BCR) was used to remove an ethyl acetate/toluene mixture under both mesophilic and thermophilic conditions, at 30–50 °C. Additional tests, e.g., toluene mass transfer measurement and monitoring of microbial population development, explained the observed bioreactor response to the conducted loading tests and temperature changes. The maximum overall elimination capacity at thermophilic conditions (50 °C) was 136.9 g·m-3 h-1, however hysteresis in elimination capacity was observed in response to ascending/descending temperature and inlet concentration changes. Representatives of genera Cupriavidus, Variovorax and order Rhodospirillales were found to be predominant in the degrading microbial population, depending on the operating temperature. Thermobacillus and Blastocatella were abundant at high (50 °C) and low (30 °C) temperatures, respectively. The observed gradual shift in microbial population caused a small yet significant gradual change in developing a preference for toluene at the expense of ethyl acetate, which explains the observed hysteresis. Yet, the whole bioreactor removal efficiency remained similar at the same temperature, thus demonstrating the advantages of using thermophiles in bioreactors with temperature variation, such as robustness and flexibility.

Název v anglickém jazyce

Thermophilic waste air treatment of an airborne ethyl acetate/toluene mixture in a bubble column reactor: Stability towards temperature changes

Popis výsledku anglicky

Thermophilic waste air treatment in a lab-scale bubble column reactor (BCR) was used to remove an ethyl acetate/toluene mixture under both mesophilic and thermophilic conditions, at 30–50 °C. Additional tests, e.g., toluene mass transfer measurement and monitoring of microbial population development, explained the observed bioreactor response to the conducted loading tests and temperature changes. The maximum overall elimination capacity at thermophilic conditions (50 °C) was 136.9 g·m-3 h-1, however hysteresis in elimination capacity was observed in response to ascending/descending temperature and inlet concentration changes. Representatives of genera Cupriavidus, Variovorax and order Rhodospirillales were found to be predominant in the degrading microbial population, depending on the operating temperature. Thermobacillus and Blastocatella were abundant at high (50 °C) and low (30 °C) temperatures, respectively. The observed gradual shift in microbial population caused a small yet significant gradual change in developing a preference for toluene at the expense of ethyl acetate, which explains the observed hysteresis. Yet, the whole bioreactor removal efficiency remained similar at the same temperature, thus demonstrating the advantages of using thermophiles in bioreactors with temperature variation, such as robustness and flexibility.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20801 - Environmental biotechnology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Hazardous Materials

ISSN

0304-3894

e-ISSN

—

Svazek periodika

384

Číslo periodika v rámci svazku

February 2020

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85076243629