Avaliação da higienização do resíduo de caixa de areia de estações de tratamento de esgoto operadas pela CESAN

AUTOR(ES)

Luciana Harue Yamane

DATA DE PUBLICAÇÃO

2007

RESUMO

The process of treatment for wastewater produces solid waste that need to be constantly removed for to keep the treatments efficiency, amongst it, the waste deposited in the deep of the grit removal. The grit removal has the objective of to remove from wastewater the grit and others particulas, including the organics, presents in the wastewater in nature, that to be dragged to the deep by sedimentation process. Although not to be to receive had importance, a time that is to embed this waste in ditches or to make use in the ground without treatment, currently, this waste it is starting to be a problem in management of stations in what it is mentioned to handle, treatment and final destination, had requirements by sanitations companies. Had necessity of to search new sources of attainment of grit, the grit removal waste it could be an option to be use in the civil construction since either carried through the disinfection of the material. The objective this work it was to evaluate the efficiency of the lime stabilization and the natural insolation in the disinfection of the grit removal waste through evaluation in the reduction of the bacteria to coliform group and helmintos eggs. The methodology used in this work has 2 stages. In the first stage, Preliminary Study, search to know the physics and microbiological characteristics of the grit, to develop procedures to collect and mount of the experiments and to test process of disinfection through to lime stabilization, chlorination and natural insolation. In the second stage, Pilot Study, evaluated the efficiency to lime stabilization in the disinfection through of the repetition to experiments. As results, the lime stabilization to leave of the dosage to 10% it can be considered efficient in removal to bacterial and helmintos eggs after one week of the treatment and the dosage to leave to 15% efficient after 48 hours of the treatment and the preliminary analysis searching to use the disinfection grit demonstrate to be viable your application in the civil construction and guarantee the security in the handle, transport and final destination.

ASSUNTO(S)

desinfecção desinfectante residuos solidos, domesticos e industriais areia cal

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