Anoxic Microbial Community Robustness Under Variation of Hydraulic Retention Time and Availability of Endogenous Electron Donors

Autor(es)

Okada, Dagoberto Y. ^[1] ; Costa, Rachel B. ^[2] ; Garcia, Caroline de Cassia B. ^[3] ; Pozzi, Eloisa ^[3] ; Souza, Theo S. O. ^[4] ; Foresti, Eugenio ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Technol, Rua Paschoal Marmo 1888, BR-13484332 Limeira, SP - Brazil

^[2] Sao Paulo State Univ, Inst Chem, Dept Biochem & Chem Technol, R Francisco Degni 55, BR-14800060 Araraquara, SP - Brazil

^[3] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Dept Hydraul & Environm Engn, Polytech Sch, Av Prof Almeida Prado 83, Trav 2, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Biochemistry and Biotechnology; v. 192, n. 2 MAY 2020.
• Citações Web of Science: 0

Resumo

The ADNMED (Anaerobic Digestion, Nitrification, and Mixotrophic Endogenous Denitrification) system comprises a triple chamber configuration that was shown to provide high-quality effluent regarding carbon, nitrogen, and sulfide. Hydraulic retention time (HRT) was 7 h in the anaerobic and anoxic chambers, and 5 h in the aerobic chamber (stage A). Sewage was directly added to the anoxic chamber to provide extra organic electron donors for denitrification (stage B) to improve the nitrogen removal efficiency (stage A 47 +/- 19%). The addition of sewage at a flow rate equivalent to 10% of the feed flow increased nitrogen removal efficiency to 61 +/- 12%. Illumina (R) sequencing revealed a restructuring of the microbial community in the anoxic chamber, according to the availability of the endogenous electron donors for denitrification. At stage A, denitrification was related to the decay of biomass, while the addition of sewage during stage B stimulated the establishment of fermentative bacteria. (AU)

• Processo FAPESP: 12/07375-7 - Remoção de matéria orgânica e de nitrogênio de esgoto sanitário em sistema composto por reator anaeróbio/anóxico interligado a reator nitrificante
• Beneficiário: Dagoberto Yukio Okada
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 09/15984-0 - Produção de bioenergia no tratamento de águas residuárias e adequação ambiental dos efluentes e resíduos gerados
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático