Organic matter as loose deposits in a drinking water distribution system

Gauthier, Vincent; Gerard, B.; Portal, Jean-Marie; Block, J. C.; Gatel, D.

doi:10.1016/s0043-1354(98)00300-5

Cited by 129 publications

(101 citation statements)

References 39 publications

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“…Therefore, even though the particles contained a large proportion of iron, the other components, namely Al, Ca, and Si, were more indicative of the particulate matter source and the occurrence of discolored water. This explanation is supported by the results of the XRD analysis shown in Figure 8c whereby the compounds Al and Si formed 31.4% of the muscovite-2M1 (KAl 2 (Si,Al) 4 By implementing the hydraulic simulation and network source-tracking model, it was determined that the majority of the water flow passes through old metallic pipes, which indicates that tubercles from corroded pipes could be a potential source of the particulate matter. The hydraulic simulation results with flow paths from the MS WTP to the analysis area are shown in Figure 7b. …”

Section: Results and Discussion For Pj City Particulatesmentioning

confidence: 70%

“…However, use of a full suite of analytical methods would be helpful to clearly characterize the sources of the particulate matter. 4) We recommend that more databases for tubercles, slimes, and particulates be created for improving predictions of the sources of particulate matter. Furthermore, microbiological processes should be further investigated to fully characterize the settling, dislodging and re-suspension processes for slimes in the form of slime in WDSs.…”

Section: )mentioning

confidence: 99%

“…However, recent studies have shown that other sources of particulate matter, aside from corrosion, can play a role in water discoloration [4][5][6][7]. Additionally, it has been reported that the accumulation of particulate matter is related to biological activity, and 1% to 12% of the organic matter may consist of bacterial biomass, thus making deposits an important factor to consider when evaluating the hygienic safety of drinking water [4].…”

Section: Introductionmentioning

confidence: 99%

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Establishment of a Practical Approach for Characterizing the Source of Particulates in Water Distribution Systems

Chae

Kim²,

Choi

et al. 2016

Water

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Water quality complaints related to particulate matter and discolored water can be troublesome for water utilities in terms of follow-up investigations and implementation of appropriate actions because particulate matter can enter from a variety of sources; moreover, physicochemical processes can affect the water quality during the purification and transportation processes. The origin of particulates can be attributed to sources such as background organic/inorganic materials from water sources, water treatment plants, water distribution pipelines that have deteriorated, and rehabilitation activities in the water distribution systems. In this study, a practical method is proposed for tracing particulate sources. The method entails collecting information related to hydraulic, water quality, and structural conditions, employing a network flow-path model, and establishing a database of physicochemical properties for tubercles and slimes. The proposed method was implemented within two city water distribution systems that were located in Korea. These applications were conducted to demonstrate the practical applicability of the method for providing solutions to customer complaints. The results of the field studies indicated that the proposed method would be feasible for investigating the sources of particulates and for preparing appropriate action plans for complaints related to particulate matter.

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Section: Results and Discussion For Pj City Particulatesmentioning

confidence: 70%

Section: )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Establishment of a Practical Approach for Characterizing the Source of Particulates in Water Distribution Systems

Chae

Kim²,

Choi

et al. 2016

Water

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“…Particulate accumulation is known to be related to biological activity (Gauthier et al, 1999). Organic matter in particulate accumulation may consist of 1-12 % of bacterial biomass, making the deposits an important factor in biological safety of drinking water .…”

Section: Identifying Relevant Transport Processes From Current Undersmentioning

confidence: 99%

Modeling particle transport and discoloration risk in drinking water distribution networks

Summeren

Blokker

2017

Drink. Water Eng. Sci.

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Abstract. Discoloration of drinking water is a worldwide phenomenon caused by accumulation and subsequent remobilization of particulate matter in drinking water distribution systems (DWDSs). It contributes a substantial fraction of customer complaints to water utilities. Accurate discoloration risk predictions could improve system operation by allowing for more effective programs on cleaning and prevention actions and field measurements, but are challenged by incomplete understanding on the origins and properties of particles and a complex and not fully understood interplay of processes in distribution networks. In this paper, we assess and describe relevant hydraulic processes that govern particle transport in turbulent pipe flow, including gravitational settling, bedload transport, and particle entrainment into suspension. We assess which transport mechanisms are dominant for a range of bulk flow velocities, particle diameters, and particle mass densities, which includes common conditions for DWDSs in the Netherlands, the UK, and Australia. Our analysis shows that the theoretically predicted particle settling velocity and threshold shear stresses for incipient particle motion are in the same range as, but more variable than, previous estimates from lab experiments, field measurements, and modeling. The presented material will be used in the future development of a numerical modeling tool to determine and predict the spatial distribution of particulate material and discoloration risk in DWDSs. Our approach is aimed at understanding specific causalities and processes, which can complement data-driven approaches.

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“…The accumulation mechanisms via corrosion (direct) and the background concentration of material from upstream or the treatment plant (indirect) have been discussed . The origin of the particles in distribution network is has been widely described (Gauthier et al, 1999;Verberk et al, 2006;Husband et al, 2008;Vreeburg, 2007;Vreeburg et al, 2008); although , this is not the subject of the current paper. There is some criticism expressed towards the PODDS model, e.g.…”

Section: Introductionmentioning

confidence: 99%

Accumulation and modeling of particles in drinking water pipe fittings

Neilands

Bernats

Rubulis

2012

Drink. Water Eng. Sci.

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Abstract. The effect of pipe fittings (mainly T-pieces) on particle accumulation in drinking water distribution networks were shown in this work. The online measurements of flow and turbidity for cast iron, polyethylene and polyvinyl chloride pipe sections were linked with analysis of pipe geometry. Up to 0.29 kg of the total amount mobilized in T-pieces ranging from DN 100/100-DN 250/250. The accumulated amount of particles in fittings was defined as J and introduced into the existing turbidity model PODDS (prediction of discoloration in distribution systems) proposed by Boxall et al. (2001) which describes the erosion of particles leading to discoloration events in drinking water network viz sections of straight pipes. However, this work does not

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Organic matter as loose deposits in a drinking water distribution system

Cited by 129 publications

References 39 publications

Establishment of a Practical Approach for Characterizing the Source of Particulates in Water Distribution Systems

Establishment of a Practical Approach for Characterizing the Source of Particulates in Water Distribution Systems

Modeling particle transport and discoloration risk in drinking water distribution networks

Accumulation and modeling of particles in drinking water pipe fittings

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