Atmospheric methane removal by methane-oxidizing bacteria immobilized on porous building materials

TY - JOUR

T1 - Atmospheric methane removal by methane-oxidizing bacteria immobilized on porous building materials

AU - Ganendra, G

AU - De Muynck, W

AU - Ho, A.

AU - Hoefman, S.

AU - De Vos, P.

AU - Boeckx, P.

AU - Boon, N.

N1 - Reporting year: 2014 Metis note: 5657, ME

PY - 2014

Y1 - 2014

N2 - Biological treatment using methane-oxidizing bacteria (MOB) immobilized on six porous carrier materials have been used to mitigate methane emission. Experiments were performed with different MOB inoculated in building materials at high (similar to 20 % (v/v)) and low (similar to 100 ppmv) methane mixing ratios. Methylocystis parvus in autoclaved aerated concrete (AAC) exhibited the highest methane removal rate at high (28.5 +/- 3.8 mu g CH4 g(-1) building material h(-1)) and low (1.7 +/- 0.4 mu g CH4 g(-1) building material h(-1)) methane mixing ratio. Due to the higher volume of pores with diameter > 5 mu m compared to other materials tested, AAC was able to adsorb more bacteria which might explain for the higher methane removal observed. The total methane and carbon dioxide-carbon in the headspace was decreased for 65.2 +/- 10.9 % when M. parvus in Ytong was incubated for 100 h. This study showed that immobilized MOB on building materials could be used to remove methane from the air and also act as carbon sink.

AB - Biological treatment using methane-oxidizing bacteria (MOB) immobilized on six porous carrier materials have been used to mitigate methane emission. Experiments were performed with different MOB inoculated in building materials at high (similar to 20 % (v/v)) and low (similar to 100 ppmv) methane mixing ratios. Methylocystis parvus in autoclaved aerated concrete (AAC) exhibited the highest methane removal rate at high (28.5 +/- 3.8 mu g CH4 g(-1) building material h(-1)) and low (1.7 +/- 0.4 mu g CH4 g(-1) building material h(-1)) methane mixing ratio. Due to the higher volume of pores with diameter > 5 mu m compared to other materials tested, AAC was able to adsorb more bacteria which might explain for the higher methane removal observed. The total methane and carbon dioxide-carbon in the headspace was decreased for 65.2 +/- 10.9 % when M. parvus in Ytong was incubated for 100 h. This study showed that immobilized MOB on building materials could be used to remove methane from the air and also act as carbon sink.

KW - international

U2 - 10.1007/s00253-013-5403-y

DO - 10.1007/s00253-013-5403-y

M3 - Article

SN - 0175-7598

VL - 98

SP - 3791

EP - 3800

JO - Applied Microbiology and Biotechnology

JF - Applied Microbiology and Biotechnology

IS - 8

ER -