Optimizing the production of short and medium chain fatty acids (SCFAs and MCFAs) from waste activated sludge using different alkyl polyglucose surfactants, through bacterial metabolic analysis.
J Hazard Mater
; 384: 121384, 2020 02 15.
Article
en En
| MEDLINE
| ID: mdl-31605978
ABSTRACT
Alkyl polyglucose is an environmentally-friendly biosurfactant, which is able to enhance short-chain fatty acids production with different carbon chain lengths and concentrations, during sludge anaerobic fermentation. This presents a promising strategy for sludge re-utilization by effectively converting hazardous sludge into value-added compounds. The maximum yield of short-chain fatty acids produced from sludge was 479.3 and 462.2 mg COD/g VSS, following pretreatment with APG06 and APG1214, respectively. To the best of our knowledge, the short-chain fatty acid production performance by sludge fermentation reported here, achieved a higher level than reported in previous studies. Additionally, these findings indicate that the production of medium-chain fatty acids from sludge can be induced by alkyl polyglucoses. Finally, the microbial community and enzyme activity were also assessed to reveal the mechanism of short-/medium-chain fatty acids biosynthesis under alkyl polyglucose pretreatment. This study demonstrates that alkyl polyglucose provides an environmentally-friendly and effective strategy for enhancing the production of short-/medium-chain fatty acids from waste activated sludge. These findings are useful for the assessment of alkyl polyglucose-assisted production of short-/medium-chain fatty acids, as well as for understanding the interactions between short-/medium-chain fatty acids and microbial communities with key enzymes, to establish short-/medium-chain fatty acids metabolic pathways during sludge fermentation.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Aguas del Alcantarillado
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Tensoactivos
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Reactores Biológicos
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Ácidos Grasos Volátiles
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Microbiota
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Glucanos
Idioma:
En
Revista:
J Hazard Mater
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2020
Tipo del documento:
Article