Optimization of linear alkylbenzene sulfonate (LAS) degradation in UASB reactors by varying bioavailability of LAS, hydraulic retention time and specific organic load rate

• DOI: 10.1016/j.biortech.2012.10.073
• Publication Date: 2012-10-26T03:20:22Z
• Authors: Dagoberto Y. Okada; Tiago P. Delforno; Andressa S. Esteves; Isabel K. Sakamoto; Iolanda C.S. Duarte; Maria B.A. Varesche
• Keywords: Hydraulic retention time; Degradation; Separator (oil production)

Degradation of linear alkylbenzene sulfonate (LAS) in UASB reactors was optimized by varying the bioavailability LAS based on concentration biomass system (1.3-16 g TS/L), hydraulic retention time (HRT), which operated at 6, 35 or 80 h, and co-substrates as specific organic loading rates (SOLR) ranging from 0.03-0.18 COD/g TVS.d. The highest degradation rate (76%) related to lowest SOLR (0.03 TVS.d). Variation HRT between 6 h resulted 18% 55%. discrete changes (ranging 37-53%). According DGGE profiles, archaeal communities exhibited greater than bacterial communities, especially samples that were obtained phase separator. parameters more influence followed HRT.