Disposição de lodo adensado de ETA em ETE com tratamento primário quimicamente assistido / Thickened water treatment sludge disposal in a wastewater treatment presenting a chemically enhanced primary treatment

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

23/08/2011

RESUMO

Treatment systems, even for water potabilization or to reduce the amount of pollutants in wastewater, include physical, chemical and biological processes, and waste generation are inherent to water or sewage treatment plants. Solid waste generated in water treatment plants have inorganic characteristic, being removed from raw water by chemical and physical processes and also products used in the conditioning of water and coagulation. The wastes generated in sewage treatment plants are derived from biochemical reactions and from decomposition of organic matter present in wastewater. As some studies have pointed to similar disposal solutions for both types of waste, despite their different characteristics, the purpose of this study was to evaluate the possibility of combined treatment of such waste, using the many advantages of each material and checking the impacts that they could generate in the sewage treatment. Using this premise, the potential use of a thickened sludge from a water treatment plant as to assist in a wastewater treatment plant was evaluated. The study and surveys presented here had the purpose to point a viable technical solution for the disposal of sludge generated in a water treatment plant narrow in the sludge treatment plant, transported and released at sewage treatment plant in Itatiba, São Paulo, Brazil. Based on the work developed, it was confirmed that the thickening of sludge in geotec bags allows water drained from them to be released into rivers, because it meets the discharge Brazilian standards required; the thickened sludge did not impair the efficiency of sewage treatment on organic load removal or suspended solids removal, mainly because the process adopted also uses coagulants. However, limiting the increase in the release is determined by project conditions, especially as the influent volume and solids load

ASSUNTO(S)

lodo lodo - reaproveitamento agua - estações de tratamento - eliminação de residuos aguas residuais - estações de tratamento gerenciamento de residuos sludge sludge water wastewater waste management

ACESSO AO ARTIGO

Documentos Relacionados