Navegando por Assunto "Sewer"

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Acesso aberto (Open Access)
O balanço de massa das unidades componentes de uma estação de tratamento de esgoto e a utilização da estatística multivariada como ferramenta de verificação do comportamento físico, químico, bacteriólogico e de metais no esgoto bruto e tratado. Estudo de caso: estação de tratamento de esgoto doméstico – ETE Sideral - Belém - PA
(Universidade Federal do Pará, 2013-10-04) FARIAS, Flavia da Silva; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593
The mass balance of the component units of a wastewater sewage treatment and use of multivariate statistics as a tool for verifying the behavior of raw sewage and treated, was implemented in ETE Sidereal Municipality of Belem do Para in Brazil. This study observed the entire flowchart constituent of the station that is designed to receive a maximum flow of raw sewage of 73 l / s. and now serves a flow of only 1.7 l / so that decreases in 96% of the station was designed, realizing then that today the Sidereal ETE is oversized. In verifying the constituent physical parts of the station there were not in compliance measures that have been suggested in the executive project and were perceived as "in situ". In the mass held for three types of flows: maximum (73 l / s) averaged 43 l / if current 1.7 l / s realized that the decrease in attendance constituent units of the system decreases somewhere around 97.5% the volume to which the components are designed for and found in the Sewage Treatment Station Sidereal. In the characterization of the metals present in the raw sewage treated and it was found that the Principal Component Analysis of the boron (B) (63.5%) and followed by barium (Ba) with (21.9%) justify 84.48% the coefficient of variation that determine how prevalent metal in the influent. In Effluent Boron (B) showed a coefficient of variation of 73.7% which justifies as the main component in the influent of WWTP. In the characterization of metals in the sludge was observed that with a percentage of 98.8% the Barium (Ba) is the main element found. The results obtained with principal component analysis to characterize the physic-chemical and bacteriological analyzes of raw sewage and treated ETE observed that the variable "total COD" is positively related to component BOD and negatively correlated with the Total Alkalinity . Regarding physic-chemical and bacteriological, high levels of BOD, Fecal coliform, TSS and VSS, from the releases of effluents, making present the highest concentrations of organic load remaining.
Acesso aberto (Open Access)
Plano diretor setorial do sistema de esgotamento sanitário: alternativas de concepção para a área de maior adensamento populacional do município de Belém - PA
(Universidade Federal do Pará, 2005) SILVA, Valdinei Mendes da; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
In this work are proposed conceptions to support the expansion planning of the collecting system, treatment and final disposal of sewer in Belém City, more specifically in the area which has the larger population density (1,143,946 inhabitants) and low Sanitary Sewer System (SSS) assistance rate. For that, actions in order to expand this infra-structure are necessary and it must occur in sustainable, efficient, planned and integrated ways. In the work are analyzed studies and projects already carried out on the planning area. Firstly, it was made a diagnostic of the SSS existent. Then it was elaborated the population projection on the period from 2005 to 2025 and calculated the sewer demand for the next 20 years. Finally, with these data, it was formulated the conception alternatives. The 6 (six) conception alternatives are based on SSS progressive decentralization showing variations concerning the number of Sewer Treatment Stations (STP), collection and transposition features of sanitary sewer among the sewerage system basins and the location of the STSs. The alternative 3 (three) was the best one because it presents sewer treatment closer to its source. The work intends to contribute towards taking decisions in order to expand the SSS in Belém City.