Enhancing acidogenic fermentation of waste activated sludge via urea hydrogen peroxide pretreatment: Performance and mechanisms.
Bioresour Technol
; 386: 129483, 2023 Oct.
Article
em En
| MEDLINE
| ID: mdl-37454957
ABSTRACT
Improving the anaerobic treatment performance of waste activated sludge (WAS) to achieve resource recovery is an indispensable requirement to reduce carbon emissions, minimize and stabilize biosolids. In this study, a novel strategy by using urea hydrogen peroxide (UHP) to enhance SCFAs production through accelerating WAS disintegration, degrading recalcitrant substances and alleviating competitive suppression of methanogens. The SCFAs production and acetate proportion rose from 436.9 mg COD/L and 31.3% to 3102.6 mg COD/L and 54.1%, respectively, when UHP grew from 0 to 80 mg/g TSS. Mechanism investigation revealed that OH, O2 and urea were the major contributors to accelerate WAS disintegration with the sequence of OH> O2 > urea. Function microbes related to acidification and genes associated with acetate production ([EC2.3.1.8] and [EC2.7.2.1]) were upregulated while genes encoding propionic acid production ([EC6.4.1.3] and [EC6.2.1.1]) were downregulated. These results raised the application prospects of UHP in WAS resource utilization.
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Coleções:
01-internacional
Base de dados:
MEDLINE
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Esgotos
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Ácidos Graxos Voláteis
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2023
Tipo de documento:
Article