Assessing the syngas biomethanation in anaerobic sludge digestion under different syngas loading rates and homogenisation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F22%3A43924245" target="_blank" >RIV/60461373:22320/22:43924245 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0016236122007888" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236122007888</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fuel.2022.123929" target="_blank" >10.1016/j.fuel.2022.123929</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Assessing the syngas biomethanation in anaerobic sludge digestion under different syngas loading rates and homogenisation

Popis výsledku v původním jazyce

Gasification offers digestate conversion into syngas, which can be metabolised to CH4 by a mixed anaerobic consortium. However, low gas-liquid mass transfer and CO presence can limit further scale-up. The present study assessed syngas biomethanation (55% H2, 45% CO) in a thermophilic lab-scale continuous anaerobic digester processing sewage sludge. Different syngas loading rates and mechanical stirring compared to pneumatic mixing were investigated. Results showed that anaerobic culture acclimation for CO utilisation is unnecessary. Moreover, the mechanical stirring replacement for the pneumatic system enhanced the gas-liquid mass transfer rate. Hence, the biological conversion of CO and H2 was improved by 30%. Nevertheless, increased pH to 8.6 resulted in acetic acid accumulation (&gt;7.5 g/L). These findings improve syngas biomethanation efficiency and suggest including a proper pH control before further scale-up.

Název v anglickém jazyce

Assessing the syngas biomethanation in anaerobic sludge digestion under different syngas loading rates and homogenisation

Popis výsledku anglicky

Gasification offers digestate conversion into syngas, which can be metabolised to CH4 by a mixed anaerobic consortium. However, low gas-liquid mass transfer and CO presence can limit further scale-up. The present study assessed syngas biomethanation (55% H2, 45% CO) in a thermophilic lab-scale continuous anaerobic digester processing sewage sludge. Different syngas loading rates and mechanical stirring compared to pneumatic mixing were investigated. Results showed that anaerobic culture acclimation for CO utilisation is unnecessary. Moreover, the mechanical stirring replacement for the pneumatic system enhanced the gas-liquid mass transfer rate. Hence, the biological conversion of CO and H2 was improved by 30%. Nevertheless, increased pH to 8.6 resulted in acetic acid accumulation (&gt;7.5 g/L). These findings improve syngas biomethanation efficiency and suggest including a proper pH control before further scale-up.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Fuel

ISSN

0016-2361

e-ISSN

1873-7153

Svazek periodika

320

Číslo periodika v rámci svazku

15 July 2022

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

123929

Kód UT WoS článku

000806815600001

EID výsledku v databázi Scopus

2-s2.0-85127207496