Abstract：
:The environmental conditions during culture enrichment, which ultimately determine its maximum specific biodegradation rate (qmax) and affinity for the target pollutant (Ks), play a key role in the performance of bioreactors devoted to the treatment of methane emissions. This study assessed the influence of Cu(2+) and CH4 concentration and the effective CH4 supply rate during culture enrichment on the structure and biodegradation kinetics of methanotrophic communities. The results obtained demonstrated that an increase in Cu(2+) concentration from 0.05 to 25 μM increased the qmax and Ks of the communities enriched by a factor of ≈ 3, even if the Cu(2+) concentration did not seem to have an effect on the enzymatic "copper switch" and only pMMO was detected. In addition, high Cu(2+) concentrations supported lower diversity coefficients (Hs ≈ 1.5× lower) and apparently promoted the growth of more adapted methanotrophs such as Methylomonas. Despite no clear effect of CH4 concentration on the population structure or on the biodegradation kinetics of the communities enriched was recorded at the two low CH4 concentrations studied (1 and 8%), a higher agitation rate increased the qmax by a factor of ≈ 2.3 and Ks by a factor of ≈ 3.1.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Cantera S,Lebrero R,García-Encina PA,Muñoz Rdoi
10.1016/j.jenvman.2016.02.002subject
Has Abstractpub_date
2016-04-15 00:00:00pages
11-20eissn
0301-4797issn
1095-8630pii
S0301-4797(16)30043-3journal_volume
171pub_type
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