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The stability of the reactors under dynamic conditions, that is, sequentially alternating pollutants (SAP), shock loads, and starvation periods was assessed. Two support materials were used: expanded clay (EC) that does not adsorb 2\u2010FB or DCM, and granular\u2010activated carbon (GAC) that adsorbs 180 mg\u2009g<jats:sup>\u22121<\/jats:sup> of 2\u2010FB and 390 mg\u2009g<jats:sup>\u22121<\/jats:sup> of DCM. The reactors were inoculated with a 2\u2010FB\u2010degrading strain (FB2) and a DCM degrader (TM1). 2\u2010FB was fed at organic loads ranging from 0 to 800 mg\u2009L<jats:sup>\u22121<\/jats:sup>\u2009d<jats:sup>\u22121<\/jats:sup>, while DCM was fed at 0\u2013250 mg\u2009L<jats:sup>\u22121<\/jats:sup>\u2009d<jats:sup>\u22121<\/jats:sup>. 2\u2010FB or DCM were never detected at the outlet of the GAC reactor, while in the EC reactor outlet small amounts were observed. Nevertheless, the highest biological elimination capacity was observed in the EC reactor (over 700 mg\u2009L<jats:sup>\u22121<\/jats:sup>\u2009d<jats:sup>\u22121<\/jats:sup> of 2\u2010FB). DGGE analysis revealed a fairly stable bacterial community with the largest shifts occurring during starvation periods and changes in feed composition. Several bacterial strains isolated from the reactors showed capacity for 2\u2010FB degradation, while only strain TM1 degraded DCM. Biotechnol. Bioeng. 2008;99: 800\u2013810. \u00a9 2007 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/bit.21630","type":"journal-article","created":{"date-parts":[[2007,8,24]],"date-time":"2007-08-24T21:50:10Z","timestamp":1187992210000},"page":"800-810","source":"Crossref","is-referenced-by-count":10,"title":["Treatment of halogenated organic compounds and monitoring of microbial dynamics in up\u2010flow fixed bed reactors under sequentially alternating pollutant scenarios"],"prefix":"10.1002","volume":"99","author":[{"given":"Maria A.E.","family":"Emanuelsson","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. 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