Effects of Nickel and Cobalt on Kinetics of Methanol Conversion by Methanogenic Sludge as Assessed by On-Line CH 4 Monitoring

Applied and Environmental Microbiology - Tập 65 Số 4 - Trang 1789-1793 - 1999
G. Gonzalez‐Gil1, Robbert Kleerebezem1, G. Lettinga1
1Department of Agricultural, Environmental and Systems Technology, Subdepartment of Environmental Technology, Wageningen Agricultural University, 6700 EV Wageningen, The Netherlands

Tóm tắt

ABSTRACT When metals were added in a pulse mode to methylotrophic-methanogenic biomass, three methane production rate phases were recognized. Increased concentrations of Ni and Co accelerated the initial exponential and final arithmetic increases in the methane production rate and reduced the temporary decrease in the rate. When Ni and Co were added continuously, the temporary decrease phase was eliminated and the exponential production rate increased. We hypothesize that the temporary decrease in the methane production rate and the final arithmetic increase in the methane production rate were due to micronutrient limitations and that the precipitation-dissolution kinetics of metal sulfides may play a key role in the biovailability of these compounds.

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Applied and Environmental Microbiology

Tập 65 Số 4

1789-1793

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