African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Economic viability of the agricultural recycling of sewage sludge in Brazil

Monica Kristina Foltran Marcon
  • Monica Kristina Foltran Marcon
  • Universidade Estadual do Oeste do Parana (UNIOESTE), Programa de Pos-Graduacao, Mestrado em Engenharia de Energia na Agricultura. Rua Universitaria, 2069, CEP 85819-130, Cascavel, Parana, Brazil.
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Elisandro Pires Frigo
  • Elisandro Pires Frigo
  • Universidade Federal do Parana (UFPR), Campus Palotina - Rua Pioneiro, 2153, CEP 85950-000, Palotina, Parana, Brazil.
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Carlos Eduardo Camargo Nogueira
  • Carlos Eduardo Camargo Nogueira
  • Universidade Estadual do Oeste do Parana (UNIOESTE), Programa de Pos-Graduacao, Mestrado em Engenharia de Energia na Agricultura. Rua Universitaria, 2069, CEP 85819-130, Cascavel, Parana, Brazil.
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Helton Jose Alves
  • Helton Jose Alves
  • Universidade Federal do Parana (UFPR), Campus Palotina - Rua Pioneiro, 2153, CEP 85950-000, Palotina, Parana, Brazil.
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Leandro Paiola Albrecht
  • Leandro Paiola Albrecht
  • Universidade Federal do Parana (UFPR), Campus Palotina - Rua Pioneiro, 2153, CEP 85950-000, Palotina, Parana, Brazil.
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Juliana Pires Frigo
  • Juliana Pires Frigo
  • Universidade Federal da Integracao Latino-Americana (UNILA). Avenida Silvio Americo Sasdelli, 1842, CEP 85866-000, Foz do Iguacu, Parana, Brazil.
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  •  Received: 17 December 2014
  •  Accepted: 26 April 2015
  •  Published: 14 May 2015

Abstract

The sewage sludge can be used for agricultural recycling as biosolids, since all the legal requirements are fulfilled, in plantations whose edible part does not have contact with the ground, thus its use is not allowed with the oleraceous, tubers, roots and flooded cultures. Considering that, from data collected by the Sanitation Company of Paraná (SANEPAR), the agronomic analysis reports of 10 lots of biosolids processed at Ouro Verde Sludge Management Unit, in the city of Foz do Iguaçu, Brazilian state of Paraná, were checked, relating the concentration of nutrients N, P, K, Ca and Mg. Assuming the biosolids are given to farmers, responsible for transportation costs, the material becomes attractive only when equivalent to mineral fertilizers cost. By determining the price of fertilizers by the lot of biosolids, the distance that justifies its utilization was established. The main results found allow the conclusion that biosolids have from R$30.83 to R$167.32 of fertilizers per ton, considering the worst and best case scenario, respectively. The compensatory distance has exceeded 1500 km, increasing the possible use by producers from other cities or states. The reduction of the humidity content in the material is directly proportional to economy granted to the producer.

 

Key words: Biosolids, fertilizer, cost.