FEASIBILITY STUDY OF CONSTRUCTED WETLANDS FOR THE TREATMENT OF DAIRY EFFLUENTS

Contenido principal del artículo

Fernanda Deister Moreira
Claudéty Barbosa Saraiva
Sue Ellen Costa Bottrel
Edgard Henrique Oliveira Dias

Resumen

This work aimed at characterizing the effluent of a small dairy in terms of flow and physical-chemical composition and at assessing constructed wetland for its treatment. The dairy produced an effluent with an average flow of 2.81 m³.d¹ and the following characteristics: 574-4155 mg.L¹ of BDO; 1531-7912 mg.L¹ of TSS; and 23-173 mg.L¹ of TKN. Using median values of BOD, three treatment systems were designed: batch activated sludge (BAS) and waste stabilisation ponds (WSP), commonly applied for the treatment of dairy effluents; and constructed wetlands (CW) as an alternative system. In terms of area requirements based on the removal of BOD, the BAS system (2.1 m²) was more advantageous than CW (15.0 m²) and WSP (46.5 m²). However, considering the removal of TKN and TSS, the WC system showed to be an attractive option for the treatment of the effluent studied. Next, a new CW system was designed aiming at removing BOD, TSS and TKN. In this case, the limiting parameter was the TKN, and not the BOD as expected. The designed CW system presented satisfactory hydraulic retention time (HRT) when compared to ranges reported in the literature, even when minimum, mean and maximum concentrations of NTK were considered for the design, corroborating the robustness of CW systems. The findings of this study confirm, therefore, the wide variation of the characteristics of dairy effluents as well as the ability of CW systems to absorb such variations without compromising the efficiency of the treatment system.

Detalles del artículo

Cómo citar
[1]
Moreira, F.D., Saraiva, C.B., Bottrel, S.E.C. y Dias, E.H.O. 2021. FEASIBILITY STUDY OF CONSTRUCTED WETLANDS FOR THE TREATMENT OF DAIRY EFFLUENTS. Revista AIDIS de ingeniería y ciencias ambientales: Investigación, desarrollo y práctica. 14, 1 (abr. 2021), 176–193. DOI:https://doi.org/10.22201/iingen.0718378xe.2021.14.1.70251.
Biografía del autor/a

Fernanda Deister Moreira, Programa de Pós Graduação em Saneamento, Meio Ambiente e Recursos Hídricos (SMARH), Universidade Federal de Minas Gerais (UFMG). Minas Gerais, Brasil.

Mestranda no Programa de Pós Graduação em Saneamento, Meio Ambiente e Recursos Hídricos da UFMG.

Claudéty Barbosa Saraiva, Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG). Minas Gerais, Brasil

Professora e Pesquisadora - Empresa de Pesquisa Agropecuária de Minas Gerais

Sue Ellen Costa Bottrel, Departamento de Engenharia Sanitária e Ambiental (ESA), Universidade Federal de Juiz de Fora (UFJF). Minas Gerais, Brasil.

Professor do Departamento de Engenharia Sanitária e Ambiental - Universidade Federal de Juiz de Fora

Edgard Henrique Oliveira Dias, Universidade Federal de Juiz de Fora

Professor do Departamento de Engenharia Sanitária e Ambiental - Universidade Federal de Juiz de Fora