Design of bio-absorbent systems for the removal of hydrocarbons from industrial wastewater: pilot-plant scale

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F21%3AN0000122" target="_blank" >RIV/60460709:41210/21:N0000122 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2305-6304/9/7/162" target="_blank" >https://www.mdpi.com/2305-6304/9/7/162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/toxics9070162" target="_blank" >10.3390/toxics9070162</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Design of bio-absorbent systems for the removal of hydrocarbons from industrial wastewater: pilot-plant scale

Popis výsledku v původním jazyce

The objective of this study was the development and design of a treatment system at a pilot-plant scale for the remediation of hydrocarbons in industrial wastewater. The treatment consists of a combined approach of absorption and biodegradation to obtain treated water with sufficient quality to be reused in fire defense systems (FDSs). The plant consists of four vertical flow columns (bioreactors) made of stainless steel (ATEX Standard) with dimensions of 1,65 x 0,5 m and water volumes of 192,4 L. Each bioreactor includes a holder to contain the absorbent material (Pad Sentec polypropylene). The effectiveness of the treatment system has been studied in wastewater with high and low pollutant loads (concentrations higher than 60,000 mg L-1 of total petroleum hydrocarbons (TPH) and lower than 500 mg L-1 of TPHs, respectively). The pilot-plant design can function at two different flow rates, Q1 (180 L h(-1)) and Q2 (780 L h(-1)), with or without additional aeration. The results obtained for strongly polluted wastewaters showed that, at low flow rates, additional aeration enhanced hydrocarbon removal, while aeration was unnecessary at high flow rates. For wastewater with a low pollutant load, we selected a flow rate of 780 L h(-1) without aeration. Different recirculation times were also tested along with the application of a post-treatment lasting 7 days inside the bioreactor without recirculation. The microbial diversity studies showed similar populations of bacteria and fungi in the inlet and outlet wastewater. Likewise, high similarity indices were observed between the adhered and suspended biomass within the bioreactors. The results showed that the setup and optimization of the reactor represent a step forward in the application of bioremediation processes at an industrial/large scale.

Název v anglickém jazyce

Design of bio-absorbent systems for the removal of hydrocarbons from industrial wastewater: pilot-plant scale

Popis výsledku anglicky

The objective of this study was the development and design of a treatment system at a pilot-plant scale for the remediation of hydrocarbons in industrial wastewater. The treatment consists of a combined approach of absorption and biodegradation to obtain treated water with sufficient quality to be reused in fire defense systems (FDSs). The plant consists of four vertical flow columns (bioreactors) made of stainless steel (ATEX Standard) with dimensions of 1,65 x 0,5 m and water volumes of 192,4 L. Each bioreactor includes a holder to contain the absorbent material (Pad Sentec polypropylene). The effectiveness of the treatment system has been studied in wastewater with high and low pollutant loads (concentrations higher than 60,000 mg L-1 of total petroleum hydrocarbons (TPH) and lower than 500 mg L-1 of TPHs, respectively). The pilot-plant design can function at two different flow rates, Q1 (180 L h(-1)) and Q2 (780 L h(-1)), with or without additional aeration. The results obtained for strongly polluted wastewaters showed that, at low flow rates, additional aeration enhanced hydrocarbon removal, while aeration was unnecessary at high flow rates. For wastewater with a low pollutant load, we selected a flow rate of 780 L h(-1) without aeration. Different recirculation times were also tested along with the application of a post-treatment lasting 7 days inside the bioreactor without recirculation. The microbial diversity studies showed similar populations of bacteria and fungi in the inlet and outlet wastewater. Likewise, high similarity indices were observed between the adhered and suspended biomass within the bioreactors. The results showed that the setup and optimization of the reactor represent a step forward in the application of bioremediation processes at an industrial/large scale.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

TOXICS

ISSN

2305-6304

e-ISSN

2305-6304

Svazek periodika

9

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

000676983800001

EID výsledku v databázi Scopus

2-s2.0-85110841419