Real-Time Control System Based on the Values of Derivative of the Redox Potential Aiming Nitrogen Removal in a Sequencing Batch Reactor Applied in Treating Dairy Wastewater

Autor(es)

Ribeiro, Rogers ; von Atzingen, Gustavo V. ; Lima, Fabio ; Okamoto, Vitor H. T. ; Arce, Aldo I. C. ; Tomamso, Giovana ; da Costa, Ernane J. X.

• Tipo de documento: Artigo Científico
• Fonte: WATER AIR AND SOIL POLLUTION; v. 228, n. 7 JUL 2017.
• Citações Web of Science: 0

Resumo

This paper presents a real-time control strategy based on the derivative of the oxi-reduction potential (ORP) values for nitrogen removal via nitrite in a sequencing batch reactor (SBR) fed with effluent from an anaerobic sequencing batch reactor (ASBR) treating dairy wastewater. The developed control strategy optimized the length of aerobic and anoxic phases without external carbon source addition. Firstly, a fixed interval length for aeration period was used in the SBR cycle to promote the nitrogen removal; however, this strategy did not allow the proper alternation of anoxic and aerobic conditions, and thus effective removal of nitrogen was not verified. After that, the real-time control strategy was implemented, and the end of nitrification and denitrification processes was determined when the derivative of the oxi-reduction potential (ORP) was close to zero. This strategy provided a removal of 92.2 +/- 9.7 and 63.9 +/- 19.0% for concentrations of TKN-N and NtN, respectively, which were well above those found for the open-loop system-43.8 +/- 21.6 and 26.5 +/- 26.2% for the removal of TKN-N and Nt-N, respectively. (AU)

• Processo FAPESP: 07/54589-4 - Desenvolvimento de sistemas de tratamento biológico de resíduos da agroindústria - estudo de caso: laticínios
• Beneficiário: Rogers Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 08/11120-9 - Tratamento de efluentes de laticínio em reator anaeróbio operado em batelada sequencial em escala piloto
• Beneficiário: Andressa Adriane Pretti
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica