Estudo comparativo das caracterÃsticas dos lÃquidos percolados gerados no Aterro Metropolitano â PB e no Aterro da Muribeca â PE

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The way of final disposition used for homely urban solid waste in Brazil and throughout the world has been sanitary embankment, which can be applied for both small and big communities. It is important to mention in this method, the treatment of the liquids that are not generated inside the heap of refuse, named leachate, which produces the percolate when mixed with the rain. This percolate has particular characteristics which must be diagnosed. This work aims at the characterization and the comparative study between the quality of the percolate generated in âLandfill Metropolitano of JoÃo Pessoaâ and that generated in âLandfill of Muribeca â Recifeâ. The âLandfill Metropolitanoâ is located in the south area of JoÃo Pessoa city and is considered a ânew embankmentâ. It started operating in 2003, and has an area of 100 ha, while âLandfill of Muribeca, with an area of 60 ha is located in Recife Metropolitan Region, and is considered an âold embankmentâ. It has been operating for 20 years but still receives new refuse. The research development was set for the period from January 2004 to July 2005. Physic-chemical parameters were analyzed â pH, electric conductance, total alkalinity, chloride, phosphorus, DBO5, DQO, total solids, volatile total solids and dissolved total solids, heavy metals â iron, copper, zinc, cadmium, cobalt, manganese, nickel, lead and chromium; and microbiologic â total coliforms and thermotolerant coliforms. The results showed that both landfills under study did not present meaningful difference, despite their different age. As an example, pH for both varies from 7.5 to 8.5 as for the heavy metals. Only iron presented relevant value, while microbiologic parameters, most of the time, presented a variation of 106 to 108. In terms of DBO5 DQO the percolate of âLandfill of Muribecaâ varied from 138 to 6,746 mgO2/L and 1,718 to 10,097 mgO2/L respectively. Concerning percolate of âLandfill Metropolitanoâ there was a DBO variation from 178 to 13,157 mgO2/L and for DQO from 2604 to 21,166 mgO2/L. The parameters analyzed were also related with precipitation and with landfill age, while the gravimetric composition of each was considered in relation to the parameters of major influence on the characterization of the leachate

ASSUNTO(S)

precipitaÃÃo engenharia civil age percolado leachate precipitation idade

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