Stirring-based control strategy for microaerobic H2S removal in sequencing batch anaerobic digesters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F21%3A43923169" target="_blank" >RIV/60461373:22320/21:43923169 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0016236121015775" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236121015775</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuel.2021.121696" target="_blank" >10.1016/j.fuel.2021.121696</a>

Result language

angličtina

Original language name

Stirring-based control strategy for microaerobic H2S removal in sequencing batch anaerobic digesters

Original language description

Microaeration in fermenters is challenging due to the rapid increase of H2S concentration upon the start of stirring, which makes biogas utilization less attractive. On these occasions, apparent H2S production exceeds the ability of sulfur-oxidizing bacteria (SOB) to remove H2S, which results in peak H2S concentrations in biogas. This study shows that such peaks can be reduced by stirring optimization. For the first time, the effect of the stirring intensity on microaeration was evaluated in a lab-scale sequencing batch reactor and supported by a biokinetic mathematical model. Single stirring intensity (15, 25, 35, and 55 RPM) and gradually increasing stirring intensity (15 to 35 RPM) were compared. Despite achieving a stably low concentration of H2S in the fermenter at low stirring speed, the accumulation of volatile fatty acids in liquid occurred. However, with gradually increasing stirring intensity, slower stirring at the beginning of the cycle led to the slower release of H2S, thereby, winning more time for SOB to remove H2S from biogas. H2S peaks were reduced by this strategy and no accumulation of volatile fatty acids in the liquid phase was observed. Since microaeration is zero-waste chemical-free desulfurization method, its optimization and H2S peaks reduction can help to expand its use.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20801 - Environmental biotechnology

Project

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Continuities

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

Fuel

ISSN

0016-2361

e-ISSN

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Volume of the periodical

306

Issue of the periodical within the volume

121696

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

"Nestránkováno"

UT code for WoS article

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EID of the result in the Scopus database

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