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Comparison of Particle-Associated Bacteria from a Drinking Water Treatment Plant and Distribution Reservoirs with Different Water Sources

Liu, G. (author), Ling, F.Q. (author), Van der Mark, E.J. (author), Zhang, X.D. (author), Knezev, A. (author), Verberk, J.Q.J.C. (author), Van der Meer, W.G.J. (author), Medema, G.J. (author), Liu, W.T. (author), Van Dijk, J.C. (author)

This study assessed the characteristics of and changes in the suspended particles and the associated bacteria in an unchlorinated drinking water distribution system and its reservoirs with different water sources. The results show that particle-associated bacteria (PAB) were present at a level of 0.8–4.5?×?103 cells ml?1 with a biological...

journal article 2016

document

Conversion of organic micropollutants with limited bromate formation during the Peroxone process in drinking water treatment

Knol, A.H. (author), Lekkerkerker-Teunissen, K. (author), Houtman, C.J. (author), Scheideler, J. (author), Ried, A. (author), Van Dijk, J.C. (author)

Advanced oxidation with O3 / H2O2 (peroxone) was conducted on pilot plant scale on pre-treated Meuse river water to investigate the conversion of organic micropollutants (OMPs) and the formation of bromate. Fourteen selected model compounds were dosed to the pre-treated river water on a regular basis to assess the efficiency of the peroxone...

journal article 2015

document

Natural manganese deposits as catalyst for decomposing hydrogen peroxide

Knol, A.H. (author), Lekkerkerker-Teunissen, K. (author), Van Dijk, J.C. (author)

Drinking water companies (are intending to) implement advanced oxidation processes (AOP) in their treatment schemes to increase the barrier against organic micropollutants (OMPs). It is necessary to decompose the excessive hydrogen peroxide after applying AOP to avoid negative effects in the following, often biological, treatment steps. A...

journal article 2015

document

Natural manganese deposits as catalyst for decomposing hydrogen peroxide (discussion paper)

Knol, A.H. (author), Lekkerkerker-Teunissen, K. (author), Van Dijk, J.C. (author)

Drinking water companies more and more implement Advanced Oxidation Processes (AOP) in their treatment schemes to increase the barrier against organic micropollutants (OMPs). It is necessary to decompose the excessive hydrogen peroxide after applying AOP to avoid negative effects in the following, often biological, treatment steps. A drinking...

journal article 2015

document

Assessment of calculation methods for calcium carbonate saturation in drinking water for DIN 38404-10 compliance

De Moel, P.J. (author), Van der Helm, A.W.C. (author), Van Rijn, M. (author), Van Dijk, J.C. (author), Van der Meer, W.G.J. (author)

The new German standard on the calculation of calcite saturation in drinking water, DIN 38404-10, 2012 (DIN), marks a change in drinking water standardization from using simplified equations applicable for nomographs and simple calculators to using extensive chemical modeling requiring computer programs. The standard outlines the chemical...

journal article 2013

document

The loop is broken; interview

Van Dijk, T. (author)

Professor of Hydraulic Engineering Han Vrijling is sad to see how attention for dikes is fading in the Netherlands. “Everyone talks about innovation like it’s a roast chicken that flies into your mouth of its own accord.”

journal article 2013

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Flow cytometry total cell counts: A field study assessing microbiological water quality and growth in unchlorinated drinking water distribution systems

Liu, G. (author), Van der Mark, E.J. (author), Verberk, J.Q. (author), Van Dijk, J.C. (author)

e objective of this study was to evaluate the application of flow cytometry total cell counts (TCCs) as a parameter to assess microbial growth in drinking water distribution systems and to determine the relationships between different parameters describing the biostability of treated water. A one-year sampling program was carried out in two...

journal article 2013

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Kallisto: Pilotonderzoek naar behandeling van riooloverstortwater en effluent van regenwaterbuffertanks

Broeders, E. (author), Menkveld, W. (author), Schellekens, D. (author), Van Dijk, P. (author), Van Nieuwenhuijzen, A. (author), Langeveld, J.G. (author)

De waterkwaliteit in de rivier de Dommel is onvoldoende voor het bereiken van een goede ecologische toestand. In de toekomst zijn daarom aanvullende maatregelen vereist. Onder het motto ´Samen, Slim, Schoon´ is Waterschap De Dommel met de gemeente Eindhoven en negen andere gemeenten in het stroomgebied van de Dommel daarom het project Kallisto...

journal article 2013

document

Zandmotor moet zandhonger stillen; interview

Van Dijk, T. (author)

Een kunstmatig schiereiland bij Ter Heijde moet de kust voeden met sediment. Wetenschappers kijken of zo’n ‘zandmotor’ het Nederlandse antwoord kan zijn op de zeespiegelstijging

journal article 2012

document

Destructive laboratory tests with PVC push-fit joints

Marques Arsenio, A. (author), Vreeburg, J.H.G. (author), Bouma, F. (author), Van Dijk, J.C. (author)

In 2010 the Dutch drinking water network stretched for almost 116,000 km supplying water to more than 16 million people. Almost 50% was made of PVC. The analysis of the failure registration of 5 Dutch drinking water companies showed that ca. 29 % of the total number of failures in the PVC Dutch network is detected at joints. In the Netherlands,...

conference paper 2012

document

Continous assessment of a drinking water PVC pipe

Marques Arsenio, A. (author), Vreeburg, J.H.G. (author), Wielinga, M.P.C. (author), Van Dijk, J.C. (author)

In 2010 the Dutch drinking water network stretched for almost 116,000 km supplying water to more than 16 million people. Almost 50% was made of PVC. The analysis of the failure registration of 5 Dutch drinking water companies showed that ca. 29 % of the total number of failures in the PVC Dutch network is detected at joints. In the Netherlands,...

conference paper 2012

document

Waterchemie voor drinkwater modeleren met PHREEQC

De Moel, P.J. (author), Van Dijk, J.C. (author), Van der Meer, W. (author)

journal article 2012

document

'Drinkwater: De volgende prooi?'

Van Dijk, H. (author)

public lecture 2011

document

Effects of ozonation and temperature on the biodegradation of natural organic matter in biological granular activated carbon filters

Van der Aa, L.T.J. (author), Rietveld, L.C. (author), Van Dijk, J.C. (author)

Four pilot (biological) granular activated carbon ((B)GAC) filters were operated to quantify the effects of ozonation and water temperature on the biodegradation of natural organic matter (NOM) in (B)GAC filters. The removal of dissolved organic carbon (DOC), assimilable organic carbon (AOC) and oxygen and the production of carbon dioxide were...

journal article 2011

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A bottom-up approach of stochastic demand allocation in water quality modelling

Blokker, E.J.M. (author), Vreeburg, J.H.G. (author), Beverloo, H. (author), Klein Arfman, M. (author), Van Dijk, J.C. (author)

An “all pipes” hydraulic model of a drinking water distribution system was constructed with two types of demand allocations. One is constructed with the conventional top-down approach, i.e. a demand multiplier pattern from the booster station is allocated to all demand nodes with a correction factor to account for the average water demand on...

journal article 2010

document

Effects of ozonation and temperature on biodegradation of natural organic matter in biological granular activated carbon filters

Van der Aa, L.T.J. (author), Rietveld, L.C. (author), Van Dijk, J.C. (author)

Four pilot (biological) granular activated carbon ((B)GAC) filters were operated to quantify the effects of ozonation and water temperature on the biodegradation of natural organic matter (NOM) in (B)GAC filters. Removal of dissolved organic carbon (DOC), assimilable organic carbon (AOC) and oxygen and the production of carbon dioxide were taken...

journal article 2010

document

A bottom-up approach of stochastic demand allocation in water quality modelling

Blokker, E.J.M. (author), Vreeburg, J.H.G. (author), Beverloo, H. (author), Klein Arfman, M. (author), Van Dijk, J.C. (author)

An “all pipes” hydraulic model of a DMA-sized drinking water distribution system was onstructed with two types of demand allocations. One is constructed with the conventional op-down approach, i.e. a demand multiplier pattern from the booster station is llocated to all demand nodes with a correction factor to account for the average water emand...

journal article 2010

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An innovative treatment concept for future drinking water production: Fluidized ion exchange – ultrafiltration – nanofiltration – granular activated carbon filtration

Li, S. (author), Heijman, S.G.J. (author), Verberk, J.Q.J.C. (author), Van Dijk, J.C. (author)

A new treatment concept for drinking water production from surface water has been investigated on a pilot scale. The treatment concept consists of fluidized ion exchange (FIEX), ultrafiltration (UF), nanofiltration (NF), and granular activated carbon filtration (GAC). The FIEX process removed calcium and other divalent cations; the UF membrane...

journal article 2009

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Arsenic in drinking water: A worldwide water quality concern for water supply companies

Van Halem, D. (author), Bakker, S.A. (author), Amy, G.L. (author), Van Dijk, J.C. (author)

For more than a decade it has been known that shallow tube wells in Bangladesh are frequently contaminated with arsenic concentrations at a level that is harmful to human health. By now it is clear that a disaster of an unheard magnitude is going on: the World Health Organization has estimated that long-term exposure to arsenic in groundwater,...

journal article 2009

document

The Dutch secret: How to provide safe drinking water without chlorine in the Netherlands

Smeets, P.W.M.H. (author), Medema, G.J. (author), Van Dijk, J.C. (author)

The Netherlands is one of the few countries where chlorine is not used at all, neither for primary disinfection nor to maintain a residual disinfectant in the distribution network. The Dutch approach that allows production and distribution of drinking water without the use of chlorine while not compromising microbial safety at the tap, can be...

journal article 2009