Continuous acidogenic fermentation: Narrowing the gap between laboratory testing and industrial application.
Bioresour Technol
; 282: 407-416, 2019 Jun.
Article
em En
| MEDLINE
| ID: mdl-30884461
ABSTRACT
This study explored the potential of acidogenic fermentation of sewage sludge (SS) in an 80â¯L automatized pilot scale platform. A high-rate VFA production was obtained at HRT 5â¯d and pH 9, with a volatile fatty acid (VFA) yield of 336â¯mgâ¯VFAâ¯g-1â¯VS and a VFA productivity of 2.15â¯kgâ¯VFAâ¯m-3â¯d-1. During co-fermentation of SS with OFMSW, a reversible pH shift from pH 9 to pH 6, evidenced a higher acidogenic activity which promoted the butyrate metabolic pathway, with 13.97â¯gâ¯CODâ¯L-1 of butyric acid and a VFA peak 23.2â¯gâ¯CODâ¯L-1. The results show the degree of flexibility of mixed culture fermentation systems, where other pH control methods other than steady control could be used to enhance the fermentation process. Ultrafiltration was a feasible technology to obtain a VFA rich permeate where 12.3-26.6â¯gâ¯CODâ¯L-1 could be recovered.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácidos Graxos Voláteis
/
Fermentação
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2019
Tipo de documento:
Article