The proper disposal of sewage sludge (SS) interferes, directly or indirectly, in the life of the whole society. In Brazil, the sewage sludge is usually disposed in landfills, when they exist. Besides the high cost, which can represent up to 50% of the cost of operating a sewage treatment plant (STP), the disposal of this waste, with high organic load, further aggravated the problem of urban waste management. The recycling of organic matter and nutrients present in this waste is the main benefit for the environment, which can also partially replace the use of chemical fertilizers. At the time when long-term studies on this subject were started, the Brazilian edafo-climatic conditions were incipient to serve as the only basis for establishing a national standard. Thus, the Resolution CONAMA No. 375 was published based only on preliminary results available from national research and regulations of other countries. In order to allow further improvements, a review of this Resolution after seven years after its original publication was scheduled. This book is based on the results of the Workshop held at the Agronomy Institute of Campinas (Campinas, SP-Brazil) between May 19 and 20 of 2009, plus other technical opinions. The subjects were addressed by researchers and trained technicians involved for long time with the issue of agricultural use of sewage sludge in Brazil. The invited foreign speakers were Dr Michael Warne (Australia) and Dr. Anthony Hay (USA).

Text in Portuguese


Aline R. Coscione
Adriana M. Pires
Thiago Nogueira

Translated by
Kleper de Oliveira Rocha