title: Metagenome or environmental sample from bioreactor sludge metagenone
organism: bioreactor sludge metagenome
description: Nonylphenol Ethoxylate is a non-ionic surfactant used worldwide in the formulation of cleaning products. Its toxicity and presence in the environment is reported in many investigations and it has been classified as an Emerging Contaminants. Biological processes have been proposed for the removal of these compounds from wastewater. However, current studies, mainly via anaerobic digestion, are limited. In this study, we evaluated the removal and degradation of Nonylphenol Ethoxylate from the co-digestion of domestic sewage and commercial laundry wastewater in an expanded granular sludge bed reactor in pilot-scale operated during 637 days with HRT of 41 h, upflow velocity of 7 m h-1 at room temperature 23 oC and different feed composition. In the first phase, the reactor was only fed synthetic substrate for biomass adaptation. Thereafter, in phases II and III the reactor was fed with SS containing 3.5 mg L-1 and 7.6 mg L-1 of NPEO, respectively. In phase IV commercial laundry wastewater was added, to obtain an approximate Nonylphenol Ethoxylate concentration of 5 mg L-1, in phase V the reactor was fed with commercial laundry wastewater and domestic sewage, maintaining a Nonylphenol Ethoxylate concentration of approximately 5 mg L-1.