Operational Performance of an AnaerobicAnoxic-Aerobic Treatment System

Authors

  • Andre Luis Calado Araujo Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte, IFRN; Universidade Federal do Rio Grande do Norte, UFRN, Brazil.
  • Danilo Luiz de Magalhães Ferraz Universidade Federal do Rio Grande do Norte, UFRN, Brazil.
  • Paulo Eduardo Vieira Cunha Companhia de Águas e Esgotos do Rio Grande do Norte, CAERN, Brazil.
  • Cícero Fernandes Neto Companhia de Águas e Esgotos do Rio Grande do Norte (CAERN), Brazil.
  • Fernando José Araújo da Silva Universidade Federal do Ceará, UFC, Brazil.

DOI:

https://doi.org/10.21664/2238-8869.2017v6i3.p247-263

Keywords:

Pollution control, Organic matter removal, UASB reactor, Wastewater treatment

Abstract

An anaerobic (UASB) – hybrid aerobic (suspended and attached growth activated sludge) wastewater treatment system was evaluated on the removal of organic matter, solids and nitrogen following its pre-operational phase. Analysis were made weekly based on composite samples, prepared by grab samples taken every four hours, during 24-hour cycle, weighted by flow rate, on each monitoring point (raw sewage, UASB, anoxic chamber, aerobic reactors, return sludge from secondary decanters and final effluent). The plant presented an average flow rate of 908 m3/h with peaks from 10 to 14 h. BOD was removed by 86 % (310 to 41 mg/L) being the highest parcel accounted by UASB reactors (70 %) and removal of total suspended solids reached 63 % (190 to 94 mg/L). Mean removals of TKN (71 %) and Ammonium (77 %) were above the value predicted by design and, probably the nitrification-denitrification process was not the dominant route.

Author Biographies

Andre Luis Calado Araujo, Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte, IFRN; Universidade Federal do Rio Grande do Norte, UFRN, Brazil.

Ph.D. in Civil Engineering at the University of Leeds, LEEDS, England. Lecturer at the Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte, IFRN; and at the Universidade Federal do Rio Grande do Norte, UFRN, Brazil.

Danilo Luiz de Magalhães Ferraz, Universidade Federal do Rio Grande do Norte, UFRN, Brazil.

Master in Sanitary Engineering at the Universidade Federal do Rio Grande do Norte, UFRN, Brazil.

Paulo Eduardo Vieira Cunha, Companhia de Águas e Esgotos do Rio Grande do Norte, CAERN, Brazil.

Ph.D. in Hydraulic and Sanitation at the Escola de Engenharia de São Carlos/USP, EESC/USP, Brazil. Environmental analyst at the Companhia de Águas e Esgotos do Rio Grande do Norte, CAERN, Brazil.

Cícero Fernandes Neto, Companhia de Águas e Esgotos do Rio Grande do Norte (CAERN), Brazil.

University Graduate in Civil Engineering at the Universidade Federal da Paraíba. University Graduate in Sanitary Engineering at the Faculdade de Saúde Pública da Universidade de São Paulo, Brazil. Civil and Sanitary Engineer at Companhia de Águas e Esgotos do Rio Grande do Norte (CAERN), Brazil.

Fernando José Araújo da Silva, Universidade Federal do Ceará, UFC, Brazil.

Ph.D. in Civil Engineering at the Universidade Federal do Ceará, UFC, Brazil. Lecturer at the Universidade Federal do Ceará, UFC, Brazil.

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Published

2017-12-31

How to Cite

ARAUJO, Andre Luis Calado; FERRAZ, Danilo Luiz de Magalhães; VIEIRA CUNHA, Paulo Eduardo; FERNANDES NETO, Cícero; ARAÚJO DA SILVA, Fernando José. Operational Performance of an AnaerobicAnoxic-Aerobic Treatment System. Fronteiras - Journal of Social, Technological and Environmental Science, [S. l.], v. 6, n. 3, p. 247–263, 2017. DOI: 10.21664/2238-8869.2017v6i3.p247-263. Disponível em: https://revistas.unievangelica.edu.br/index.php/fronteiras/article/view/2108. Acesso em: 22 dec. 2024.