Performance of the constructed wetland systems in pollutants removal from hog wastewater

  • Antonio Teixeira de Matos Universidade Federal de Viçosa
  • Wallison da Silva Freitas Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas Gerais
  • Paola Alfonsa Vieira Lo Monaco Universidade Federal de Viçosa
Keywords: waste management, pig waste, wetlands systems, cultivated beds

Abstract

The main objective of this work was to evaluate the efficiency of a constructed wetland systems (CWS) for pollutants removal, in mono crop and multi crop with three different species of plants, originated from hog wastewater treatment (HW). Therefore, 5 CWS of 24.0 m x 1.1 m x 0.7 m were constructed, sealed with a membrane of polyvinyl chloride (PVC) and filled with 0.4 m of small gravel. In CWS1, CWS2 and CWS3 grown to cattail (Typha latifolia L.), Alternanthera philoxeroides (Mart.) Griseb. and Tifton 85 grass (Cynodon dactylon Pers.), respectively. In the bed of CWS4 was planted at 1st third Alternanthera, cattail, in the 2nd third and tifton-85 grass and in the 3rd third of. The CWS5 was not planted and it was used as control. After passing through a filter filled with crushed bagasse of sugar cane, the HW was applied to the CWS in a flow of 0.8 m3 d-1, which corresponded to a hydraulic detention time of 4.8 days. According to the results it was shown that the five CWS(s) had statistically nearly the same removal of pollutants, and the average removal efficiency of TSS, COD, BOD and Zn, were 91, 89, 86 and 94%, respectively. Also high removals were obtained concerning the ST, N-total, NH4+ and P-total, with average values of 62, 59, 52 and 50%, respectively. The plants in all planted CWS worked in a similar way maintaining the system efficiency and the non cultivated CWS presented analogous capacity of pollutants removal when compared to the cultivated CWS(s).

Author Biographies

Antonio Teixeira de Matos, Universidade Federal de Viçosa
Engenheiro Agrícola D.S em Solos e Nutrição de Plantas - UFV Professor do Departamento de Engenharia Agrícola e Ambiental da UFV Área: conservação do solo e da água; manejo e tratamento de resíduos agroindustriais; qualidade do meio físico e ambiental
Wallison da Silva Freitas, Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas Gerais
Engenheiro Agrícola D.S em Recursos Hídricos e Ambientais - UFV Professor do Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas Gerais Area: Recursos hídricos e ambientais
Paola Alfonsa Vieira Lo Monaco, Universidade Federal de Viçosa
Paola Alfonsa Vieira Lo Monaco Engenheira Agrícola D.S em Recursos Hídricos e Ambientais Professora do Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo - IFE Professora (lotação provisória) do Departamento de Engenharia Agrícola e Ambiental da Universidade Federal de Viçosa - MG Aréa: Recursos Hídricos e Ambientais
Published
25/08/2010
Section
Papers