Implantação de células experimentais para a avaliação de codisposição de resíduos sólidos de serviço de saúde e resíduos sólidos domiciliares: resultados preliminares

Abstract

The treatment and final disposal of hospital solid wastes have been subjects of controversies related to the available technological alternatives and to the risks to the environment and public health. The present work evaluates the physico-chemical and toxicological characterization of leachate of healthcare solid wastes (HSW) and municipal household solid wastes (MSW) collected by the municipal service of waste collection (Companhia Municipal de Limpeza Urbana COMLURB), in Rio de Janeiro city and the aim was to support the discussion about the need of a differential treatment and final disposal of hospital wastes. The solid wastes were disposed as follows: C1 contains 100% of MSW, C2 contains 100% of HSW and C3 contains 98% of USW mixed with 2% of de HSW. Leachates generated from new sanitary landfills are characterized by high levels of biodegradability. However, the results showed a low biodegradability level in the leachate from the experimental cells C1, C2 and C3. The physico-chemical results also indicate that microorganisms are still at the stage of adaptation to the environment. The results has shown more similarities than differences in the leachate generated from the disposal of MSW, HSW and their codisposal during a period of 60 days of experimental cells operation.