Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. João Dagnone, 1100 - Jd. Santa Angelina, CEP 13563-120 São Carlos, SP, Brazil.
Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. João Dagnone, 1100 - Jd. Santa Angelina, CEP 13563-120 São Carlos, SP, Brazil.
Bioresour Technol. 2014 Sep;167:316-23. doi: 10.1016/j.biortech.2014.06.002. Epub 2014 Jun 17.
The aim of this study was to evaluate the removal of linear alkylbenzene sulfonate (LAS) in an anaerobic fluidized bed reactor (AFBR) treating wastewater containing soap powder as LAS source. At Stage I, the AFBR was fed with a synthetic substrate containing yeast extract and ethanol as carbon sources, and without LAS; at Stage II, soap powder was added to this synthetic substrate obtaining an LAS concentration of 14 ± 3 mg L(-1). The compounds of soap powder probably inhibited some groups of microorganisms, increasing the concentration of volatile fatty acids (VFA) from 91 to 143 mg HAc L(-1). Consequently, the LAS removal rate was 48 ± 10% after the 156 days of operation. By sequencing, 16S rRNA clones belonging to the phyla Proteobacteria and Synergistetes were identified in the samples taken at the end of the experiment, with a remarkable presence of Dechloromonas sp. and Geobacter sp.
本研究旨在评估在处理含有肥皂粉作为 LAS 来源的废水的厌氧流化床反应器 (AFBR) 中去除直链烷基苯磺酸盐 (LAS) 的效果。在第一阶段，AFBR 以含有酵母提取物和乙醇作为碳源的合成基质为食，不含 LAS；在第二阶段，将肥皂粉添加到这种合成基质中，得到 LAS 浓度为 14±3mgL(-1)。肥皂粉中的化合物可能抑制了某些微生物群体，导致挥发性脂肪酸（VFA）的浓度从 91mgHAcL(-1)增加到 143mgHAcL(-1)。因此，在 156 天的运行后，LAS 的去除率为 48±10%。通过测序，在实验结束时采集的样本中鉴定出属于变形菌门和互营菌门的 16S rRNA 克隆，其中明显存在脱硫单胞菌属和地杆菌属。
