Pilot-scale investigation on the feasibility of simultaneous nitrification and denitrification (SND) in a continuous flow single-stage membrane bioreactor

Autor(es)

Subtil, Eduardo Lucas ^[1] ; Silva, Marina Victoretti ^[1] ; Lotto, Bruna Araujo ^[1] ; Domingues Moretto, Mercia R. ^[1] ; Mierzwa, Jose Carlos ^[2]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC, Modeling & Appl Social Sci Ctr, Ave Estados 5001, BR-09210580 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Sch Engn, Ave Prof Almeida Prado 83, BR-05508900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF WATER PROCESS ENGINEERING; v. 32, DEC 2019.
• Citações Web of Science: 1

Resumo

The aim was to evaluate the effect of three different dissolved oxygen concentration (DO) on membrane fouling and foulants production as well as in the removal of nitrogen and organic matter by Simultaneous Nitrification and Denatrification (SND). For this purpose, a sMBR pilot plant was operated with continuous flow and no separated anoxic zone. Experiments were carried out in three phases, i.e. phase I, II and III, with DO 2.0, 0.8 and 0.4 mg/L, respectively. Under these conditions, a good performance in terms of COD and BOD5,20 was obtained, removals higher than 96% and 97%, respectively. The nitrification was almost complete, even when the dissolved oxygen concentration was the lowest, Phase III. The reduction of DO concentration positively impacted the total nitrogen removal through SND, especially in Phase II, resulting in an average total nitrogen removal of 66%, while in Phase I, the average removal was only 28%. Sludge filterability, membrane performance and total resistance of mixed liquor under SND conditions when the DO was 0.8 +/- 0.1 mgO(2)/L were not significantly affected. Conversely, a significant change was observed when the DO concentration was reduced to 0.4 mg +/- 0.1 mg O-2/L. (AU)

• Processo FAPESP: 16/23684-0 - Uma nova abordagem para o tratamento de esgoto e recuperação de água e energia: desenvolvimento de um biorreator eletroquímico com membranas condutivas (BREMc) operado em condição de nitrificação e desnitrificação simultânea (NDS)
• Beneficiário: Eduardo Lucas Subtil
• Modalidade de apoio: Auxílio à Pesquisa - Regular