Biological removal of H2S gas in a semi-pilot scale biotrickling filter: Optimization of various parameters for efficient removal at high loading rates and low pH conditions.
Bioresour Technol
; 285: 121328, 2019 Aug.
Article
em En
| MEDLINE
| ID: mdl-31003205
ABSTRACT
In this study, a semi-pilot scale biotrickling filter (BTF) was operated in a continuous co-current mode to remove high concentration of hydrogen sulfide (H2S) at optimum operational conditions. The early startup period of 6â¯days was needed, and then stable removal of H2S gas at inlet concentrations up to about 2000â¯ppm was successfully obtained at gas retention time (GRT) of 15â¯min and liquid recirculation rate (LRR) of 120â¯ml/min. The elimination capacities (ECs) increased linearly with increase in H2S loading rates (HLRs up to 38.5â¯g/m3â¯h), but a gradual decrease in removal efficiency was observed from a volumetric HLR of 18.1â¯g/m3â¯h. The LRR was further decreased from 120 to 30â¯ml/min, and the minimum liquid-gas ratio of 0.24 was found without decrease in removal efficiency. The MiSeq analysis revealed the presence of sulphur oxidizing bacteria (SOB) dominated by Acidithiobacillus caldus (>97%) at all portions of BTF.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Filtração
/
Sulfeto de Hidrogênio
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2019
Tipo de documento:
Article