The Effect of Treated Sewage Outflow From a Modernized Sewage Treatment Plant on Water Quality of the Breń River

Kowalik, Tomasz; Bogdał, Andrzej; Borek, Łukasz; Kogut, A.V.

doi:10.12911/22998993/59355

Cited by 12 publications

(10 citation statements)

References 1 publication

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“…The results described by Kowalik et al (2015) are quite different from those obtained by this work. They determine the effect of treated sewage discharged from a mechanical-biological sewage treatment plant, modernized in 2007-2008, on the water quality of the Breń River.…”

Section: Discussioncontrasting

confidence: 98%

The contribution of the Guarulhos Municipality (São Paulo State) to the water quality of the Alto Tietê System

et al. 2017

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A contribuição do município de Guarulhos (Estado de São Paulo) para a qualidade de água do Sistema Alto Tietê. Guarulhos (SP) tem apresentado índices de crescimento populacional acima da média da Região Metropolitana de São Paulo (RMSP). A Bacia Hidrográfica do Rio Baquirivu Guaçu (BHRBG), onde se localiza o Rio Baquirivu Guaçu, é o vetor de expansão urbana do município e da região. Este trabalho apresenta uma análise da qualidade das águas do Rio Baquirivu-Guaçu na entrada e na saída do município de Guarulhos, avaliando os efeitos da implantação das ETEs e do uso da terra sobre a qualidade das águas do Rio Baquirivu-Guaçu, entre os anos de 2010 e 2014. Para isto foram elaborados os mapas de uso de terra no período analisado, uma análise do funcionamento das ETEs na área de estudo, e a análise estatística dos Índices de Qualidade de Águas (IQA) e de seus parâmetros nos diferentes pontos do rio. Os dados referentes às análises físico-química e microbiológica do Rio Baquirivu-Guaçu indicam uma qualidade de água na saída do município de Guarulhos (IQA=16), muito inferior àquela que recebe do município de Arujá (IQA=32). Os valores médios, em especial para os parâmetros DBO, OD, TU, ST e CF indicam uma piora na qualidade das águas do Rio Baquirivu-Guaçu no ponto BQGU03850. Os valores dos parâmetros NT, PT e pH foram muito próximos para ambos os pontos da entrada e saída da bacia. A análise entre a evolução do uso da terra e a qualidade da água demonstra as consequências do processo inadequado de crescimento urbano na bacia e que as fontes poluidoras domésticas e industriais representam considerável risco à qualidade das águas, demonstrando que as obras de saneamento realizadas até o momento não foram eficazes na redução de cargas poluidoras das águas do rio Baquirivu-Guaçu.

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Section: Discussioncontrasting

confidence: 98%

The contribution of the Guarulhos Municipality (São Paulo State) to the water quality of the Alto Tietê System

et al. 2017

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“…The load of supplied sewage proved too big in relation to water flow in the stream, which led to worsening of water quality in the watercourse. Also, research conducted by KOWALIK et al [2015] on the Breń River revealed a considerable influence of treated sewage discharge from modernized mechanical and biological sewage treatment plant on the quality of receiving waters. The discharge caused increase in values of 12 out of 17 analysed physicochemical indices in the Breń River, of which in 8 cases these dependencies were statistically significant.…”

Section: Resultsmentioning

confidence: 99%

Influence of Sitkówka sewage treatment plant on the Bobrza River water quality

Kanownik

Policht-Latawiec

Gajda

2017

Journal of Water and Land Development

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The paper presents an analysis of 20 physicochemical elements in the Bobrza River water sampled above and below the treated sewage discharge point. Sitkówka mechanical and biological sewage treatment plant with a value of 289 000 People Equivalent discharges on average 51 000 m 3 of treated sewage daily, which makes up 29% of mean daily flow in the Bobrza River. On the basis of hydrochemical analyses it was stated that the discharge of treated sewage led to worsening of 18 out of 20 studied water quality indices in the Bobrza River. In the river water below the sewage discharge statistically significantly higher values of electrolytic conductivity, dissolved solids, calcium, magnesium, sodium and potassium were registered. A decrease in dissolved oxygen content in the water and increase in its electrolytic conductivity caused a change of water quality class in the Bobrza River from the maximum potential to potential below good. On the other hand, increase in concentrations of dissolved solids and sulphates caused a change of the water class from the maximum potential to good potential. Statistical factor analysis (FA) made possible a reduction of a set of 20 physicochemical elements to four mutually orthogonal factors explaining 95% (above the treatment plant) and 96% (below the treatment plant) of the internal structure of primary data. The first factor is connected with point source pollution (sewage discharge), the second describes oxygen conditions in water, the third results from seasonality and is responsible for the pollutants from natural sources, whereas the fourth factor has not been unanimously defined yet.

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“…On the other hand, studies by Ofman et al [2017] showed that properly treated sewage does not affect the quality of receiving waters. The results of research by Kowalik et al [2015] show that although the discharge of treated sewage to one of the rivers of the southern Poland caused a statistically significant increase in half of the tested physicochemical indicators of the receiving waters and the change in the water quality class from I to II, the concentrations of pollutants in the treated sewage did not exceed the limit values specified in the water law permit. Wąsik et al [2017] showed, however, that although most of the tested physicochemical parameters allowed for the classification of the treated sewage-receiving river to I or II class of water quality, microbiological contamination expressed by the numbers of coliforms and Escherichia coli classified the quality of the river below the point of sewage discharge even to IV and V class.…”

Section: Introductionmentioning

confidence: 97%

Analysis of the Hydraulic Load of a Local WWTP In the South-Eastern Poland Including Hydraulic Capacity of the Sewage Receiver

Młyńska¹,

Młyński²,

Chmielowski³

2022

J. Ecol. Eng.

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The paper constitutes the analysis of hydraulic load of a local wastewater treatment plant in the south-eastern Poland along with the analysis of sewage receiver hydraulic capacity and related receiving waters protection. Assuming that the daily outflow of treated sewage should not exceed 10% of the mean-low flow (SNQ) of the receiver, no case of daily sewage outflow greater than 10%•SNQ = 51 840 m 3 •d -1 was recorded. Moreover, average daily hydraulic load of the treatment plant was lower than the limit value by over 70% and the maximum recorded value -by over 40%. Furthermore, the conducted analysis shows that the particular months differed from each other in the values of the daily hydraulic load of the wastewater treatment plant at the outflow; May was the month with the highest average daily sewage outflow, while September was characterized by the lowest average daily outflow of treated sewage. There was also no clear dependence between the hydraulic load of the WWTP and the day of the week. Daily sewage outflows ranging from 10 000 m 3 •d -1 to 12 000 m 3 •d -1 constituted the largest part of all observations. The daily sewage outflows directed to the receiver prove that there is no threat to the preservation of the water environment quality.

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The Effect of Treated Sewage Outflow From a Modernized Sewage Treatment Plant on Water Quality of the Breń River

Cited by 12 publications

References 1 publication

The contribution of the Guarulhos Municipality (São Paulo State) to the water quality of the Alto Tietê System

The contribution of the Guarulhos Municipality (São Paulo State) to the water quality of the Alto Tietê System

Influence of Sitkówka sewage treatment plant on the Bobrza River water quality

Analysis of the Hydraulic Load of a Local WWTP In the South-Eastern Poland Including Hydraulic Capacity of the Sewage Receiver

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