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Zinc deprivation of methanol fed anaerobic granular sludge bioreactors

Overview of attention for article published in Journal of Industrial Microbiology & Biotechnology, February 2008
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Title
Zinc deprivation of methanol fed anaerobic granular sludge bioreactors
Published in
Journal of Industrial Microbiology & Biotechnology, February 2008
DOI 10.1007/s10295-008-0315-z
Pubmed ID
Authors

Fernando G. Fermoso, Gavin Collins, Jan Bartacek, Piet N. L. Lens

Abstract

The effect of omitting zinc from the influent of mesophilic (30 degrees C) methanol fed upflow anaerobic sludge bed (UASB) reactors, and latter zinc supplementation to the influent to counteract the deprivation, was investigated by coupling the UASB reactor performance to the microbial ecology of the bioreactor sludge. Limitation of the specific methanogenic activity (SMA) on methanol due to the absence of zinc from the influent developed after 137 days of operation. At that day, the SMA in medium with a complete trace metal solution except Zn was 3.4 g CH4-COD g VSS(-1) day(-1), compared to 4.2 g CH4-COD g VSS(-1) day(-1) in a medium with a complete (including zinc) trace metal solution. The methanol removal capacity during these 137 days was 99% and no volatile fatty acids accumulated. Two UASB reactors, inoculated with the zinc-deprived sludge, were operated to study restoration of the zinc limitation by zinc supplementation to the bioreactor influent. In a first reactor, no changes to the operational conditions were made. This resulted in methanol accumulation in the reactor effluent after 12 days of operation, which subsequently induced acetogenic activity 5 days after the methanol accumulation started. Methanogenesis could not be recovered by the continuous addition of 0.5 microM ZnCl2 to the reactor for 13 days. In the second reactor, 0.5 microM ZnCl2 was added from its start-up. Although the reactor stayed 10 days longer methanogenically than the reactor operated without zinc, methanol accumulation was observed in this reactor (up to 1.1 g COD-MeOH L(-1)) as well. This study shows that zinc limitation can induce failure of methanol fed UASB reactors due to acidification, which cannot be restored by resuming the continuous supply of the deprived metal.

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Mendeley readers

The data shown below were compiled from readership statistics for 31 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Indonesia 1 3%
Poland 1 3%
Unknown 29 94%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 8 26%
Researcher 7 23%
Student > Master 6 19%
Professor 2 6%
Student > Bachelor 2 6%
Other 4 13%
Unknown 2 6%
Readers by discipline Count As %
Environmental Science 9 29%
Agricultural and Biological Sciences 7 23%
Chemical Engineering 2 6%
Engineering 2 6%
Chemistry 2 6%
Other 5 16%
Unknown 4 13%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 April 2013.
All research outputs
#7,845,805
of 12,503,594 outputs
Outputs from Journal of Industrial Microbiology & Biotechnology
#695
of 956 outputs
Outputs of similar age
#77,663
of 144,712 outputs
Outputs of similar age from Journal of Industrial Microbiology & Biotechnology
#12
of 15 outputs
Altmetric has tracked 12,503,594 research outputs across all sources so far. This one is in the 23rd percentile – i.e., 23% of other outputs scored the same or lower than it.
So far Altmetric has tracked 956 research outputs from this source. They receive a mean Attention Score of 3.6. This one is in the 21st percentile – i.e., 21% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 144,712 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 35th percentile – i.e., 35% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 15 others from the same source and published within six weeks on either side of this one. This one is in the 20th percentile – i.e., 20% of its contemporaries scored the same or lower than it.