Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Trabalhador São-carlense Avenue 400, 13566-590 São Carlos, SP, Brazil.
Bioresour Technol. 2013 Jan;128:125-33. doi: 10.1016/j.biortech.2012.10.073. Epub 2012 Oct 26.
Degradation of linear alkylbenzene sulfonate (LAS) in UASB reactors was optimized by varying the bioavailability of LAS based on the concentration of biomass in the system (1.3-16 g TS/L), the hydraulic retention time (HRT), which was operated at 6, 35 or 80 h, and the concentration of co-substrates as specific organic loading rates (SOLR) ranging from 0.03-0.18 g COD/g TVS.d. The highest degradation rate of LAS (76%) was related to the lowest SOLR (0.03 g COD/g TVS.d). Variation of the HRT between 6 and 80 h resulted in degradation rates of LAS ranging from 18% to 55%. Variation in the bioavailability of LAS resulted in discrete changes in the degradation rates (ranging from 37-53%). According to the DGGE profiles, the archaeal communities exhibited greater changes than the bacterial communities, especially in biomass samples that were obtained from the phase separator. The parameters that exhibited more influence on LAS degradation were the SOLR followed by the HRT.
采用改变系统生物质浓度（1.3-16 g TS/L）、水力停留时间（HRT，分别为 6、35 或 80 h）和共基质浓度（以特定有机负荷率（SOLR）表示，范围为 0.03-0.18 g COD/g TVS.d）来优化 UASB 反应器中直链烷基苯磺酸盐（LAS）的降解。LAS 的最高降解率（76%）与最低 SOLR（0.03 g COD/g TVS.d）有关。HRT 在 6 和 80 h 之间的变化导致 LAS 的降解率在 18%到 55%之间变化。LAS 的生物可利用性的变化导致降解率发生离散变化（范围为 37-53%）。根据 DGGE 图谱，与细菌群落相比，古菌群落的变化更大，尤其是在来自相分离器的生物质样本中。对 LAS 降解表现出更大影响的参数是 SOLR，其次是 HRT。
