O emprego da análise de imagem na determinação da distribuição de tamanho de partículas da areia presente no esgoto sanitário

Prado, Gustavo Silva do; Campos, José Roberto

doi:10.1590/s1413-41522009000300014

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…As wastewater enters a treatment facility, it typically flows through a step called preliminary treatment. This stage, which removes gross solids and coarse suspended and floating matter, has not received much research attention, and it is highly dependent on the initial design characteristics of the plant [3][4][5]. However, its impact on the management, operation, and maintenance of one of these wastewater treatment plants (WWTPs), as well as its influence on the performance of the subsequent treatment stages, is very important.…”

Section: Introductionmentioning

confidence: 99%

Gross Solids Content Prediction in Urban WWTPs Using SVM

Pérez

Fernández

et al. 2021

Water

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The preliminary treatment of wastewater at wastewater treatment plants (WWTPs) is of great importance for the performance and durability of these plants. One fraction that is removed at this initial stage is commonly called gross solids and can cause various operational, downstream performance, or maintenance problems. To avoid this, data from more than two operation years of the Villapérez Wastewater Treatment Plant, located in the northeast of the city of Oviedo (Asturias, Spain), were collected and used to develop a model that predicts the gross solids content that reaches the plant. The support vector machine (SVM) method was used for modelling. The achieved model precision (Radj2 = 0.7 and MSE = 0.43) allows early detection of trend changes in the arrival of gross solids and will improve plant operations by avoiding blockages and overflows. The results obtained indicate that it is possible to predict trend changes in gross solids content as a function of the selected input variables. This will prevent the plant from suffering possible operational problems or discharges of untreated wastewater as actions could be taken, such as starting up more pretreatment lines or emptying the containers.

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Section: Introductionmentioning

confidence: 99%

Gross Solids Content Prediction in Urban WWTPs Using SVM

Pérez

Fernández

et al. 2021

Water

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“…The initial pre-treatment phase is of great importance for the proper functioning of WWTP (wastewater treatment plants) [1]; however, as indicated by several authors [2,3], the next steps of these facilities have been studied further given their great impact on water recovery. Parameters such as pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD) and suspended solids (SS) in later stages have been the subject of numerous studies [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Sand Content Prediction in Urban WWTPs Using MARS

Pérez

Fernández

et al. 2020

Water

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The pre-treatment stage of wastewater treatment plants (WWTP), where most of the larger waste, including sand and fat, is removed, is of great importance for the performance and durability of these plants. This work develops a model that predicts the sand content that reaches the plant. For this purpose, data were collected from one operation year of the Villapérez Wastewater Treatment Plant located in the northeast of the city of Oviedo (Asturias, Spain) and the MARS (Multivariate Adaptive Regression Splines) method was used for modelling. The accuracy of the MARS model developed using the determination coefficient is R2 = 0.74 for training data and R2 = 0.70 in validation data. These results indicate that it is possible to predict trend changes in sand production as a function of input variables changes such as flow rate, pH, ammonia, etc. This will prevent the plant from possible operational problems, as actions could be taken, such as starting up more pre-treatment lines or emptying the containers, so that the arrival of the sand can be assumed without any problem. In this way, the possibility of letting sand contents over the established limits pass that could affect the following processes of the treatment plant is avoided.

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Tamanho de bolhas de ar formadas por difusores não porosos na água

Neto

2015

Eng. Sanit. Ambient.

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RESUMONeste estudo foram realizados experimentos para investigar o tamanho de bolhas de ar formadas a partir de difusores não porosos em um tanque de água.O tamanho das bolhas individuais e o diâmetro de Sauter foram avaliados usando uma técnica de processamento de imagens. Os resultados confirmam que a vazão de ar e o diâmetro do orifício são parâmetros importantes que controlam a distribuição do tamanho das bolhas e o diâmetro de Sauter.Análise dimensional é realizada para fornecer uma relação adimensional geral para predição do diâmetro de Sauter (usando uma escala de comprimento adequada, baseada na vazão de ar) e o número de Reynolds na saída do orifício. Essa relação apresenta bom ajuste aos dados experimentais obtidos neste estudo e a partir de investigações anteriores disponíveis na literatura, incluindo também experimentos com múltiplos orifícios. Finalmente, são apresentadas aplicações potenciais da relação adimensional obtida.Palavras-chave: análise dimensional; bolhas; diâmetro de Sauter; processamento de imagens; plumas.

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O emprego da análise de imagem na determinação da distribuição de tamanho de partículas da areia presente no esgoto sanitário

Cited by 3 publications

References 11 publications

Gross Solids Content Prediction in Urban WWTPs Using SVM

Gross Solids Content Prediction in Urban WWTPs Using SVM

Sand Content Prediction in Urban WWTPs Using MARS

Tamanho de bolhas de ar formadas por difusores não porosos na água

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