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BIBTEX RIS

Laundry wastewater and domestic sewage pilot-scale anaerobic treatment: Microbial community resilience regarding sulfide production

2019; Elsevier BV; Volume: 251; Linguagem: Inglês

10.1016/j.jenvman.2019.109495

1095-8630

Alana Gandra Lima de Moura, Victor Borin Centurion, Dagoberto Yukio Okada, Fabrício Motteran, Tiago Palladino Delforno, Viviane Maia Barreto de Oliveira, Maria Bernadete Amâncio Varesche,

Wastewater Treatment and Nitrogen Removal

In this study, the removal of anionic surfactant Linear Alkylbenzene Sulfonate (LAS) from laundry wastewater was evaluated in co-digestion with domestic sewage, using a pilot-scale Expanded Granular Sludge Bed reactor. Surfactant influent concentration was enhanced from 5 ± 3 mg LAS L-1 (stage I) to 19 ± 10 mg LAS L-1 (stage II) and 36 ± 19 mg LAS L-1 (stage III) throughout reactor operation. Sulfide levels higher than 20 mg L-1 influenced LAS removal efficiency, which decreased from 71% to 55% and 32% in stage I, II and III, respectively. Acclimation of microbial population was verified and higher relative abundance of the genera similar to Cytophaga, Bacteroides, Syntrophus and Syntrophobacter in the early stages (adaptation and stage I) was replaced by higher relative abundance of the genera Anaerophaga, Nitrosovibrio, Sulfurovum and Desulfovibrio in the last stages (stage II and III).