Single and combined inhibition of Methanosaeta concilii by ammonia, sodium ion and hydrogen sulfide.
Bioresour Technol
; 281: 401-411, 2019 Jun.
Article
em En
| MEDLINE
| ID: mdl-30844642
ABSTRACT
Single and combined inhibition of lag time λ and specific methanogenic activity RCH4 of Methanosaeta concilii by NH3, Na+ and H2S were investigated using inhibition tests with a single inhibitor and a 33 full-factorial experiment of NH3, Na+ and H2S concentrations (1.5â¯≤â¯total ammonia nitrogen (TAN)/Lâ¯≤â¯4.5â¯g, 1â¯≤â¯Na+/Lâ¯≤â¯4.3â¯g, 14.2â¯≤â¯total hydrogen sulfide sulfur (THSS)/Lâ¯≤â¯836â¯mg). All three inhibitors significantly increased λ and reduced RCH4 of M. concilii. The half-maximal inhibitory concentrations of NH3, Na+ and H2S for M. concilii were 6.4â¯g TAN/L, 5.2â¯g Na+/L and 1.6â¯g THSS/L. Partial cubic models adequately approximated the corresponding response surfaces of λ and RCH4 from the 33 full-factorial experiment. The inhibitors inhibited RCH4 synergistically, but inhibited λ in a complex manner. The combination of NH3 and Na+ showed the strongest synergistic inhibition of both λ and RCH4.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sódio
/
Methanosarcinales
/
Amônia
/
Sulfeto de Hidrogênio
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2019
Tipo de documento:
Article