Abstract：
:Four anaerobic fluidized bed reactors filled with activated carbon (R1), expanded clay (R2), glass beads (R3) and sand (R4) were tested for anaerobic degradation of LAS. All reactors were inoculated with sludge from a UASB reactor treating swine wastewater and were fed with a synthetic substrate supplemented with approximately 20 mg l(-1) of LAS, on average. To 560 mg l(-1) COD influent, the maximum COD and LAS removal efficiencies were mean values of 97+/-2% and 99+/-2%, respectively, to all reactors demonstrating the potential applicability of this reactor configuration for treating LAS. The reactors were kept at 30 degrees C and operated with a hydraulic retention time (HRT) of 18h. The use of glass beads and sand appear attractive because they favor the development of biofilms capable of supporting LAS degradation. Subsequent 16S rRNA gene sequencing and phylogenetic analysis of samples from reactors R3 and R4 revealed that these reactors gave rise to broad microbial diversity, with microorganisms belonging to the phyla Bacteroidetes, Firmicutes, Actinobacteria and Proteobacteria, indicating the role of microbial consortia in degrading the surfactant LAS.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
de Oliveira LL,Costa RB,Okada DY,Vich DV,Duarte IC,Silva EL,Varesche MBdoi
10.1016/j.biortech.2010.01.141subject
Has Abstractpub_date
2010-07-01 00:00:00pages
5112-22issue
14eissn
0960-8524issn
1873-2976pii
S0960-8524(10)00227-0journal_volume
101pub_type
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