Evaluation of pathogens persistence in soil cultivated with eucalyptus and fertilized with sewage sludge

Author(s)

Marianne Fidalgo de Faria

• Document type: Master's Dissertation
• Press: Botucatu. 2016-03-07.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agronômicas. Botucatu
• Defense date: 2015-07-28
• Advisor: Robert Boyd Harrison; Iraê Amaral Guerrini

Abstract

The application of sewage sludge on agricultural land has been considered the most suitable practice for final disposal of this organic waste daily generated in large quantities in urban areas. Within the agriculture context, the forestry sector stands out as potential candidate for the use of organic waste due to several peculiarities that have the incorporation of organic matter as a source of benefits. The sewage sludge contains many pathogens such as helminth ova, bacteria, viruses, protozoa and fungi, which restrict your application on soil in some countries. In Brazil, the CONAMA Resolution nº. 375/2006, came out after several years of discussion involving acceptable risks for the use of sewage sludge in agriculture and established maximum limits for pathogens concentration in sludge to be applied on soil. The main studies involving the survival time of pathogens in soils fertilized with sewage sludge were conducted in North America and Europe, making the tropical regions at a disadvantage due to the lack of specific information. The present study evaluated the persistence of viable Ascaris spp ova, fecal coliforms, Salmonella spp and enteroviruses in soil cultivated with Eucalyptus and fertilized with sewage sludge in an area located in the city of Avare, State of Sao Paulo, Brazil, following the method developed by the United States Environmental Protection Agency (USEPA) and adopted by CONAMA Resolution nº 375/2006. Two different sewage sludge were applied on soil surface, one from Sewage Treatment Plant of Jundiai and other from Sewage Treatment Plant of Taubate. The average time estimated for fecal coliform's survival were 54 and 93 weeks for Jundiai and Taubate sludge, respectively. Because of ... (AU)

• FAPESP's process: 14/03024-0 - EVALUATION OF PATHOGENS PERSISTENCE IN AGRICULTURAL SOIL CULTIVATED WITH EUCALIPT AND FERTILIZED WITH SEWAGE SLUDGE.
• Grantee: Marianne Fidalgo de Faria Guidorizzi
• Support Opportunities: Scholarships in Brazil - Master