Research of dosfolat addition in activated sludge systems for control and decrease the quantity of produced sludge. / Investigação da adição de dosfolat em sistemas de lodos ativados para controle e redução de lodo gerado.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Aiming to study the reduction in waste production in the activated sludge process, a Treatment Pilot Plant was built at Centro Tecnológico de Hidráulica, situated at the campus of Universidade de São Paulo, in São Paulo. The Pilot Plant was composed of two parallel and identical systems, that were operated in the conventional activated sludge process with complete mixing. This study was conducted in three different and successive phases. In each phase, the first system received addition of Dosfolat XS, in order to verify if this product would decrease the quantity of produced sludge, in comparison with the second system, which did not receive any addition. The three phases above mentioned were consisted in the operation of those two systems during 94, 79 and 133 effective days respectively. There was, in the first and second phases, primary effluent feeding at 5m3/day flow and, in the third phase, raw wastewater feeding at 2m3/day. During this three phase experiment, its several parameters were monitored: settleability parameters, total and volatile suspended solids concentration of the sludge in the biologic reactors, and the removal efficiency of BOD, COD, TKN and Phosphorus for those two parallel systems. The results of this study indicated only the efficiency of Dosfolat XS to decrease the quantity of produced sludge in wastewater treated by activated sludge process, in comparison with the activated sludge process without Dosfolat XS addition.

ASSUNTO(S)

ácido fólico dosfolat activated sludge dosfolat lodo ativado folic acid

ACESSO AO ARTIGO

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