Searched for: author%3A%22Van+der+Helm%2C+A.W.C.%22
(1 - 10 of 10)
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Ross, P.S. (author), van der Helm, A.W.C. (author), Van Den Broeke, J. (author), Rietveld, L.C. (author)
The application of ozone in water treatment serves many purposes, such as disinfection and degradation of organic micro-pollutants. To optimise the applied ozone dosage by on-line control, real-time information on the actual Ct value, the bromate and assimilable organic carbon concentration (AOC) is necessary. With UV/Vis spectroscopy,...
journal article 2016
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Kramer, O. (author), Jobse, M.A. (author), Baars, E.T. (author), van der Helm, A.W.C. (author), Colin, M.G. (author), Kors, L.J. (author), van Vugt, W.H. (author)
Softening at drinking water treatment plants is often realised by fluidised bed pellet reactors. Generally, sand is used as seeding material and pellets are produced as a by-product. To improve to sustainability, research has been carried out to replace the seeding material by re-using grained and sieved calcite pellets as seeding material. An...
conference paper 2015
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Van der Helm, A.W.C. (author), Bhai, A. (author), Coloni, F. (author), Koning, W.J.G. (author), De Bakker, P.T. (author)
lecture notes 2015
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Van der Helm, A.W.C. (author), Bhai, A. (author), Coloni, F. (author), Koning, W.J.G. (author), De Bakker, P.T. (author)
Three years after Zaatari camp was established in the Hashemite Kingdom of Jordan, to host Syrian refugees, its population has grown to 82,000 persons. Zaatari is one of the largest refugee camps in the world, in one of the most water scarce areas on earth. Since its establishment, drinking water has been delivered by trucks to communal...
conference paper 2015
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Van der Helm, A.W.C. (author), Kramer, O.J.I. (author), Hooft, J.F.M. (author), De Moel, P.J. (author)
In practice, drinking water technologists use simplified calculation methods for aquatic chemistry calculations. Recently, the database stimela.dat is developed especially for aquatic chemistry for drinking water treatment processes. The database is used in PHREEQC, the standard in geohydrology for calculating chemical equilibria in groundwater....
conference paper 2015
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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
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Worm, G.I.M. (author), Kelderman, J.P. (author), Lapikas, T. (author), Van der Helm, A.W.C. (author), Van Schagen, K.M. (author), Rietveld, L.C. (author)
This research deals with the contribution of process simulation models to the factory acceptance test (FAT) of process automation (PA) software of drinking water treatment plants. Two test teams tested the same piece of modified PA-software. One team used an advanced virtual commissioning (AVC) system existing of PA-emulation and integrated...
conference paper 2012
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Ross, P.S. (author), Van der Helm, A.W.C. (author), Van den Broeke, J. (author), Rietveld, L.C. (author)
The application of ozone in water treatment serves many purposes, such as disinfection, degradation of organic micro-pollutants and oxidation of taste, odour and colour producing compounds. A commonly used method to determine the disinfection capacity of ozonation is calculating the exposure of pathogens to ozone, this capacity is expressed as...
conference paper 2012
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van der Helm, A.W.C. (author)
Drinking water treatment plants automation becomes more sophisticated, more on-line monitoring systems become available and integration of modeling environments with control systems becomes easier. This gives possibilities for model-based optimization. In operation of drinking water treatment plants, the processes are usually optimized...
doctoral thesis 2007
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van der Helm, A.W.C. (author), Smeets, P.W.M.H. (author), Bosklopper, Th.G.J. (author)
report 2005
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