Performance of digester decant system with biological filter followed by constructed wetland and solar reactor in the treatment of domestic sewage

  • Glícia Pinto Barra Reinaldo Universidade Federal Rural do Semi-Árido - UFERSA
  • Rafael Oliveira Batista Universidade Federal Rural do Semi-Árido - UFERSA
  • Paulo César Moura da Silva UFERSA
  • Luis César de Aquino Lemos Filho Universidade Federal Rural do Semi-Árido - UFERSA
  • Miguel Ferreira Neto Universidade Federal Rural do Semi-Árido - UFERSA
  • Delfran Batista dos Santos Instituto Federal de Educação, Ciência e Tecnologia Baiano
Keywords: sustainability, sanitation, wastewater

Abstract

This study aimed to analyze the performance of digester decant system with biological filter followed by constructed wetland and solar reactor in the treatment of domestic sewage from Milagres rural community in Apodi-RN. The treatment system was monitored for the period of October and November 2010, 48 days after planting Pennisetum purpureum Schumach. Samples of domestic sewage were collected at different stages of treatment, in four replications on time, to determine physicochemical and microbiological characteristics about the system performance. The results indicated significant removal of turbidity, biochemical oxygen demand, chemical oxygen demand, total solids, suspended solids, phosphorus and oil and grease using the set digester decant with biological filter, followed by constructed wetland and solar reactor; the association of average solar radiation of 28.73 MJ m-2 d-1, effluent depth of 0.10 m on reactor and time of sun exposure of 12 hours provided removal of fecal coliform up to 99.99% of domestic sewage in Apodi, RN, the treated effluent met microbiological standard of the Brazilian guidelines for agricultural use with restrictions.

Author Biographies

Glícia Pinto Barra Reinaldo, Universidade Federal Rural do Semi-Árido - UFERSA
http://lattes.cnpq.br/1423516676064122
Rafael Oliveira Batista, Universidade Federal Rural do Semi-Árido - UFERSA
Depto de Ciências Ambientais e Tecnológicas
Paulo César Moura da Silva, UFERSA
Depto de Ciências Ambientais e Tecnológicas
Luis César de Aquino Lemos Filho, Universidade Federal Rural do Semi-Árido - UFERSA
Depto de Ciências Ambientais e Tecnológicas
Miguel Ferreira Neto, Universidade Federal Rural do Semi-Árido - UFERSA
Depto de Ciências Ambientais e Tecnológicas
Delfran Batista dos Santos, Instituto Federal de Educação, Ciência e Tecnologia Baiano
Instituto Federal de Educação, Ciência e Tecnologia Baiano
Published
24/08/2012
Section
Papers