Culture scale-up and immobilisation of a mixed methanotrophic consortium for methane remediation in pilot-scale bio-filters.
Environ Technol
; 38(4): 474-482, 2017 Feb.
Article
em En
| MEDLINE
| ID: mdl-27267085
ABSTRACT
Robust methanotrophic consortia for methane (CH4) remediation and by-product development are presently not readily available for industrial use. In this study, a mixed methanotrophic consortium (MMC), sequentially enriched from a marine sediment, was assessed for CH4 removal efficiency and potential biomass-generated by-product development. Suitable packing material for bio-filters to support MMC biofilm establishment and growth was also evaluated. The enriched MMC removed â¼7-13% CH4 under a very high gas flow rate (2.5â
Lâ
min-1; 20-25% CH4) in continuous-stirred tank reactors (â¼10â
L working volume) and the biomass contained long-chain fatty acids (i.e. C16 and C18). Cultivation of the MMC on plastic bio-balls abated â¼95-97% CH4 in pilot-scale non-sterile outdoor-operated bio-filters (0.1â
Lâ
min-1; 1% CH4). Contamination by cyanobacteria had beneficial effects on treating low-level CH4, by providing additional oxygen for methane oxidation by MMC, suggesting that the co-cultivation of MMC with cyanobacterial mats does not interfere with and may actually be beneficial for remediation of CH4 and CO2 at industrial scale.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Ocupacionais do Ar
/
Consórcios Microbianos
/
Metano
Idioma:
En
Revista:
Environ Technol
Assunto da revista:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Austrália