Microbial populations associated with fixed- and floating-bed reactors during a two-stage anaerobic process
Int. microbiol
; 10(4): 245-251, dic. 2007. ilus, tab
Article
in En
| IBECS
| ID: ibc-62538
Responsible library:
ES15.1
Localization: ES15.1 - BNCS
ABSTRACT
Microbial populations associated with methanogenic fixed- or floating-bed bioreactors used for anaerobic digestion of lignocellulosic waste were investigated. Fluorescent in situ hybridization (FISH) was used to characterize microorganisms in samples obtained from different heights in the reactors, which were operated in a semi-continuous manner (feeding and mixing once every 2 days). The FISH results showed that Methanosaeta concilii cells were most numerous at the bottom of both reactors. M. concilii cells were more abundant in the fixed-bed reactor (FXBR), which performed better than the floating-bed reactor (FLBR). Species of the Methanosarcina genera (mainly M. barkeri and M. mazei) were also observed in the FLBR but rarely in the FXBR. Methane production in each of the reactors ranged from 0.29 to 0.33 m3 CH(4)/kg COD(rem) (chemical oxygen demand removed). The removal of volatile fatty acids (VFA; 70-75 h) in the FXBR was more efficient than in the FLBR (AU)
RESUMEN
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Collection:
National databases
/
Spain
Health context:
SDG3 - Target 3.9 Reduce the amount of deaths produced by dangerous chemicals and the pollution of the air, water and soil
Health problem:
Water, Sanitation and Hygiene
Database:
IBECS
Main subject:
Sludge Digestion
/
Wastewater
Type of study:
Risk factors
Language:
English
Journal:
Int. microbiol
Year:
2007
Document type:
Article
Institution/Affiliation country:
Technical University of Munich/Germany