Abstract：
:Performance stability is a key issue when managing anaerobic digesters. However it can be affected by external disturbances caused by micropollutants. In this study the influence of phenol on the methanization of cellulose was evaluated through batch toxicity assays. Special attention was given to the dynamics of microbial communities by means of automated ribosomal intergenic spacer analysis. We observed that, as phenol concentrations increased, the different steps of anaerobic cellulose digestion were unevenly and progressively affected, methanogenesis being the most sensitive: specific methanogenic activity was half-inhibited at 1.40 g/L of phenol, whereas hydrolysis of cellulose and its fermentation to VFA were observed at up to 2.00 g/L. Depending on the level of phenol, microbial communities resisted either through physiological or structural adaptation. Thus, performances at 0.50 g/L were maintained in spite of the microbial community's shift. However, the communities' ability to adapt was limited and performances decreased drastically beyond 2.00 g/L of phenol.
journal_name
Biodegradationjournal_title
Biodegradationauthors
Chapleur O,Madigou C,Civade R,Rodolphe Y,Mazéas L,Bouchez Tdoi
10.1007/s10532-015-9751-4subject
Has Abstractpub_date
2016-02-01 00:00:00pages
15-27issue
1eissn
0923-9820issn
1572-9729pii
10.1007/s10532-015-9751-4journal_volume
27pub_type
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