Treatment aerobic conjugate of sludges of septic tanks and household organic solid wastes

  • Monica Maria Pereira da Silva Universidade Estadual da Paraíba- UEPB
  • José Tavares de Sousa Universidade Estadual da Paraíba-UEPB
  • Beatriz Susana Ovruski Ceballos Universidade Estadual da Paraíba-UEPB
  • Wanderson Barbosa da Silva Feitosa
  • Valderi Duarte Leite Universidade Estadual da Paraíba-UEPB
Keywords: Septic tank, sludges, co-composting, biossolids

Abstract

It was aimed at to evaluate the co-composting as technological alternative to the treatment of sludges of septic tanks with household organic solid wastes originating from cities of small and medium loads. The sludges and the domiciliary organic solid waste were collected in Cabaceiras, Caraúbas and Queimadas, state of Paraíba. The experiment consisted of four treatments with three repetitions, totaling 12 reactors, of cylindrical configuration in polyethylene of 100 L of capacity. Each reactor was fed with 50 kg substratum with variable composition in function of the sludge fraction: 0%, 10%, 20% and 30%. The manual turning was accomplished three times a week and the temperature was monitored daily. The total destruction of helminth eggs in period differentiated in function of the sludges fraction (14, 28, 35 and 63 days) and the medium transformation of 54.1% of sludges in biosolids class A and class B, with favorable characteristics to the use in agricultural cultures in 91 days, expressed the viability of the treatment for co-composting of sludges of tanks septic multichamber of collective use for the cities of small and medium load.

Author Biographies

Monica Maria Pereira da Silva, Universidade Estadual da Paraíba- UEPB
Bióloga. Especialista em Educação Ambiental. Mestra em Desenvolvimento e Meio Ambiente. Dra. em Recursos Naturais/UFCG (2008). Profa. do Departamento de Biologia da UEPB.
José Tavares de Sousa, Universidade Estadual da Paraíba-UEPB
Mestre em Recursos Hídricos, UFPB (1986), Doutor em Hidráulica e Saneamento, USP (1996). Professor do curso de Engenharia Sanitária e Ambiental da Universidade Estadual da Paraíba (DQ/CCT/UEPB). Diretor do
Beatriz Susana Ovruski Ceballos, Universidade Estadual da Paraíba-UEPB
Bioquímica pela Universidade Nacional de Tucumán. Mestre em Microbiologia e Imunologia pela Universidade Federal de São Paulo (UNIFESP/EPM). Doutora em Ciências (Microbiologia Ambiental) na USP. Professora Titular da Universidade Estadual da Paraíba (UEPB).
Wanderson Barbosa da Silva Feitosa
Químico Industrial/UEPB. Mestrando em Recursos Naturais/UFCG
Valderi Duarte Leite, Universidade Estadual da Paraíba-UEPB
Mestre em Recursos Hídricos, UFPB (1986), Doutor em Hidráulica e Saneamento. Professor DQ/CCT/UEPB
Published
21/12/2009
Section
Papers