Four samples were collected from biological reactors treating wastewater containing an anionic surfactant (linear alklybenzene sulfonate - LAS)

Four samples were collected from biological reactors treating wastewater containing an anionic surfactant (linear alklybenzene sulfonate - LAS), aiming to analyze the microbial structure. Two reactors were fed with wastewater containing LAS (~10 mg/L), at a hydraulic retention time (HRT) of 35 h. Reactor R1L was fed with a synthetic wastewater containing LAS and reactor RL1 was fed with a laundry wastewater diluted (1:25). LAS degradation rate was 82±9% and 45±16% in the reactors RL1 and RS1, respectively. The samples were collected from the biomass in the sludge-blanket (SB) and phase-separator (PS) from reactors RL1 and RS1. These samples were named as SB-RL1, PS-RL1, SB-RS1 and PS-RS1. The samples were sequenced in a 454 platform. The four samples were sequenced in a run using barcodes (SBRL1: CGACGTGACT; PS-RL1: TACACACACT; SB-RS1: TACACGTGAT; PS-RS1: TACAGATCGT).