Practical aspects, experiences and strategies by using UV/VIS sensors for long-term sewer monitoring

Gruber, Günter; Bertrand-Krajewski, Jean-Luc; Beneditis, Jérôme De; Lettl, Wolfgang

doi:10.2166/wpt.2006020

Cited by 26 publications

(23 citation statements)

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“…The obtained data show that Finnish municipalities rarely use technologies such as dissolved oxygen or turbidity measurements in sewers, which are the main instruments that have been used elsewhere in Europe in highly instrumented wastewater networks (Gruber et al, 2006). We found that the majority of the Finnish wastewater networks use magnetic flow meters and flow measurements based on the operation time of pumps.…”

Section: Resultsmentioning

confidence: 92%

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Measurement and Control Practices in Finnish Wastewater Networks

Poutiainen

Heinonen‐Tanski

2010

Water Environment Research

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In this paper, we describe measurement and control practices in Finnish wastewater networks. We have surveyed the 14 largest wastewater treatment plants in the country, which account for approximately 40% of total Finnish treatment capacity. It was found that these plants still only rely on a few, traditional measurement techniques. The treatment processes could be improved, and the treatment could be made more energy‐efficient by installing modern instrumentation. We review some recent developments in wastewater plant instrumentation technology and suggest improvements to Finnish plants.

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Section: Resultsmentioning

confidence: 92%

“…This new sensor technology offers several advantages compared with classical turbidometry, wet-chemistry, or UV analyzers (online). The sensors can be installed in situ, as automated cleaning systems are available (Gruber et al, 2006).…”

Section: Measurement Informationmentioning

confidence: 99%

Measurement and Control Practices in Finnish Wastewater Networks

Poutiainen

Heinonen‐Tanski

2010

Water Environment Research

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“…Para el caso específico de plantas de tratamiento de aguas residuales (PTAR), la espectrometría UV-Vis en línea (219 longitudes de onda en el rango de UV hasta Visible: 200-745 nm, con pasos de 2,5 nm) puede ser utilizada para el monitoreo y control en la entrada y salida de dichas plantas, así como para monitorear las diferentes etapas del tratamiento. Lo anterior tiene el propósito de determinar las dinámicas de las cargas y eficiencias de remoción de materiales orgánicos (como DQO y DBO5), nitratos, nitritos y sólidos suspendidos totales (SST) [2][3] a escalas temporales adecuadas y eventualmente utilizar esa información para la toma de decisiones en tiempo real. Además de los métodos utilizados para la calibración de los captores [4][5] y el análisis de las series de tiempo de espectros de absorbancia UV-Vis, es necesario conocer si las series de tiempo son persistentes (memoria a largo plazo), si contienen ruido aleatorio (ruido blanco), si tienen un comportamiento determinístico o si son anti-persistentes (no correlacionadas) y comprender el comportamiento del fenómeno que las genera [6].…”

Section: Introductionunclassified

Estimación del exponente de HURST y dimensión fractal para el análisis de series de tiempo de absorbancia UV-VIS

Nossa

Angulo

Méndez

2014

Cien.Ing.Neogranadina

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<p>El objetivo de este trabajo es estimar el exponente o parámetro de Hurst y la dimensión fractal para el análisis de series de tiempo de espectrometría UV-Vis, utilizando el análisis de componentes principales PCA (<em>Principal Component Analysis</em>). El análisis se realiza para comprender si las series de tiempo de absorbancia UV-Vis son persistentes, anti-persistentes, determinísticas o si son ruido blanco. Se utilizaron tres diferentes series de tiempo de absorbancia UV-Vis para tres diferentes sitios de estudio: (i) Planta de tratamiento de aguas residuales Salitre (PTAR) en Bogotá; (ii) Estación elevadora de Gibraltar en Bogotá (EEG); y (iii) Planta de tratamiento de aguas residuales San Fernando (PTAR) en Itagüí (sur de Medellín). Cada una de las series de tiempo tiene igual número de muestras (5705). Se redujo la dimensionalidad de los espectros de absorbancia, dada su alta correlación, con PCA y se utilizó para cada sitio de estudio la primera componente principal. Esta componente principal explicó entre el 82% al 94% de la variabilidad para los tres sitios de estudio. Se determinaron los exponentes de Hurst: (i) 0.8 para PTAR Salitre; (ii) 0.85 para EEG; y (iii) 0.89 para PTAR San Fernando. A partir de los valores de los exponentes de Hurst se determinan las dimensiones fractales para las tres series de tiempo de absorbancia UV-Vis en los tres sitios de estudio y se obtiene en promedio una dimensión fractal de 1153. Las tres series de tiempo de absorbancia UV-Vis son persistentes y con alta auto-similitud, dado que el exponente de Hurst es mayor a 0.5.</p>

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“…Currently, the suspended particles concentration in wastewater is either measured through sampling either through turbidity or UV-Vis spectroscopy (Gruber et al 2005;Ruban et al 2006). The major drawback of the first method is the time delay between the sampling and the measurement which forbids any real time retroaction on the water regulation.…”

Section: Introductionmentioning

confidence: 99%

Suspended particles in wastewater: their optical, sedimentation and acoustical characterization and modeling

Pallarès

François

Pons

et al. 2011

Water Science and Technology

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Wastewater regulation and treatment is still a major concern in planetary pollution management. Some pollutants, referred to as particulate matter, consist of very small particles just suspended in the water. Various techniques are used for the suspended particles survey. Few of them are able to provide real-time data. The development of new, real time instruments needs the confrontation with real wastewater. Due its instability, the modeling of wastewater in terms of suspended solids was explored. Knowing the description of real wastewater, we tried to produce a synthetic mixture made of basic organic ingredients. A good agreement in terms of turbidity and settling velocity was observed between the artificial wastewater matrix and the real one. The investigation of the individual contribution of the different compounds to the acoustical signal showed a more complex dependence. Thus the modeling of wastewater with reference to turbidity and settling velocity is not sufficient to describe it acoustically. Further studies should lead to a good comparison of the acoustical and turbidity behavior of wastewater.

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Practical aspects, experiences and strategies by using UV/VIS sensors for long-term sewer monitoring

Cited by 26 publications

References 0 publications

Measurement and Control Practices in Finnish Wastewater Networks

Measurement and Control Practices in Finnish Wastewater Networks

Estimación del exponente de HURST y dimensión fractal para el análisis de series de tiempo de absorbancia UV-VIS

Suspended particles in wastewater: their optical, sedimentation and acoustical characterization and modeling

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