Optiflux® RO design with center port pressure vessels for water treatment plant Dinxperlo, The Netherlands

2010 ◽  
Vol 5 (1) ◽  
Author(s):  
Ron C.M. Jong ◽  
Marc J. Kalf ◽  
Walter G.J. van der Meer
Keyword(s):  
Water Treatment ◽  
The Netherlands ◽  
Pressure Vessel ◽  
Membrane Filtration ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Pressure Vessels ◽  
Feed Water ◽  
Hydraulic Pressure ◽  
Pressure Losses

Recent commissioned Vitens NF and RO treatment plants are provided with the Optiflux® stack configuration. Aim of the Optiflux® concept is to optimize the permeate flow in RO/NF plants by minimizing hydraulic pressure losses and the osmotic pressure difference across the membrane surface. An increase in permeate productivity of 20% can be achieved, for both NF and RO membrane filtration systems, by lowering the number of membrane modules per pressure vessel to three, which leads to lower hydraulic pressure losses. In one pressure vessel of 6 elements with 3 elements in each side and a center port in the middle; the feed water flows in the two directions (each side of the pressure vessel) and passes through the 3 elements of each side and the retentate is collected in the center port and feeds the second stage with the same principal. The permeate flows via the center tube of the spiral wound membranes and is collected in the permeate tank. The first full scale plant of 320 m3/h based on this concept is already commissioned at the 20th November 2006 at Vitens drinking water treatment plant Dinxperlo in The Netherlands.

Enhancing the particle removal efficiency of a drinking water treatment plant by membrane filtration

2001 ◽  
Vol 1 (5-6) ◽  
pp. 377-380
Author(s):  
G. Hagmeyer ◽  
O. Kiepke ◽  
W. Dautzenberg ◽  
R. Gimbel
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Pressure Vessel ◽  
Membrane Filtration ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Pressure Vessels ◽  
Particle Removal ◽  
Reservoir Water ◽  
Particle Counter

In the first step of the project funded by the German Federal Ministry for Education and Research (BMBF) three UF pilot systems (about 10 m3/h) were evaluated for drinking water treatment of reservoir water. In the second step a 150 m3/h pilot plant with 12 6 m long pressure vessels was installed in the waterworks of Roetgen. One of the unique features of the pilot is, that the inlet and outlet flows of every pressure vessel are monitored. Further on a particle counter is installed. With this particle counter the filtrate of every pressure vessel can be monitored automatically by switching magnetic valves.

Experiences with the World’s Largest Municipal Waste Water Treatment Plant Using Membrane Technology

2006 ◽  
Vol 1 (4) ◽  
Author(s):  
N. Engelhardt ◽  
W. Lindner
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Activated Sludge ◽  
Membrane Filtration ◽  
Anthropogenic Impacts ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Economic Point

With the commissioning of the waste water treatment plant Nordkanal, which has been dimensioned for a design capacity of 80,000 population equivalents, new worldwide standards for the implementation of large membrane-activated sludge plants have been created both from a technical and from an economic point of view. The hitherto successful operation of this plant has already now contributed towards this technology becoming suitable for use in large waste water treatment plants. The now two years the waste water treatment plant Nordkanal has been in operation have once again demonstrated that even on a large scale, membrane-activated sludge plants are able to reliably produce purified effluent of excellent quality, while simultaneously providing a small-sized design. They prove advantageous everywhere small-sized designs are sought after and the purified effluent has to meet high or special requirements. Wherever purification requirements are intensified in the foreseeable future, whether with regard to the hygienisation of effluent, or in the framework of re-using purified waste water as industrial water or potable water or in order to protect natural drinking water resources from critical anthropogenic impacts, the membrane bioreactor process or membrane filtration is trend setting and will increasingly gain in importance.

Biological P-Removal: State of the Art in The Netherlands

1993 ◽  
Vol 27 (5-6) ◽  
pp. 317-328 ◽  
Author(s):  
W. van Starkenburg ◽  
J. H. Rensink ◽  
G. B. J. Rijs
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
The Netherlands ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Chemical Precipitation ◽  
Waste Water Treatment Plant ◽  
Factors Affecting ◽  
P Removal

In the Netherlands the effluent requirements of municipal waste water treatment plants for P will become stricter in 1995. Depending on the design capacity of the waste water treatment plant the effluent requirement will be 1 mg/l P for plants with a treatment capacity of over 100,000 p.e. and 2 mg/l for a lower capacity. From all the P-removal techniques, such as chemical precipitation, fluid-bed pellet reactor and magnetic separation, the most promising technique in the Netherlands would seem to be biological P-removal with or without a combination of the three other techniques. In this paper a description is given of biological P-removal, especially the principle, the factors affecting biological P-removal performance, the different modifications and an example of each system in the Netherlands.

Development of a predictive model to determine the temporal variability in mine feed water quality towards informing and forecasting plant operating strategy – a South African coal mine water treatment plant case study

2016 ◽  
Vol 11 (3) ◽  
pp. 621-633
Author(s):  
J. Nathoo ◽  
E. Hong Gay ◽  
N. Hussain
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Coal Mine ◽  
Mine Water ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Feed Water ◽  
Unsteady State ◽  
Mine Water Treatment ◽  
Brine Treatment

The feed water quality associated with mine water treatment is typically characterised by a dynamic variability resulting from the fact that the final feed water to the water treatment plant (WTP) can be an amalgamation of water streams emanating from a number of sources. Consequently, the ability to deal with the dynamic nature of the feed water quality towards successful and sustainable mine water treatment goes beyond a proactive approach and requires a systemic, predictive approach. This paper discusses the development of an unsteady state mass balance model on a surface dam located on a coal mine towards predicting the dynamic fluctuations in total dam volume and its total dissolved solids (TDS) concentration in the feed water to a NuWater 20 MLD mobile WTP, comprising chemical conditioning, ultrafiltration and reverse osmosis (RO). The unsteady state mass balance, incorporated water entering the dam via the opencast pits, underground compartments, seasonal rainfall and the RO brine return. Water leaving the dam comprised the feed water to the WTP, partial brine treatment, surface evaporation and seepage. Validation of the model using actual data over an 8-month period showed excellent results. The model showed that without water treatment, the dam would overflow in 218 days. Although the dam's volume could be sustained at the ideal volume by treating 14.2 MLD, its TDS would exceed the maximum environmental limit in 197 days. Consequently, the combination of a 13.2 MLD WTP with a 1 MLD brine treatment plant provided the optimal water treatment strategy to sustainably maintain the dam's TDS concentration and volume within acceptable limits over the 5-year investigation period. This paper demonstrates the importance of using a predictive methodology for forecasting feed water characteristics and as an early warning system for most water treatment systems that are subjected to dynamic conditions.

Control of bulking in a full scale plant by addition of talc (PE 8418)

1998 ◽  
Vol 37 (4-5) ◽  
pp. 297-301 ◽  
Author(s):  
D. H. Eikelboom ◽  
J. Grovenstein
Keyword(s):  
Water Treatment ◽  
The Netherlands ◽  
Settling Velocity ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Aeration Tank ◽  
Problem Type ◽  
Normal Plant ◽  
Free Particles ◽  
Mineral Product

A very severe bulking problem (Type 021N) in the water treatment plant of Bodegraven in The Netherlands was solved by the addition of a specially shaped talqueous powder, PE 8418. After addition of this mineral product, the SVI dropped almost instantaneously from 850 ml/g to 250 ml/g and over the next 2 weeks decreased further to 100 to 125 ml/g. A ratio PE 8418/biomass of 0.6:1 was sufficient to keep the SVI at this level. The settling velocity of the sludge increased from <1.0m/h to 1.5 m/h. These settling properties allowed normal plant operation. During the first 2 weeks of the experiment, scum on the final clarifier and the aeration tank caused some problems. It is assumed that the complete incorporation of PE 8418 particles into the flocs takes some time, if a large quantity of this product is added at once. Meanwhile, free particles may contribute to stabilization of gas bubbles, viz. flotation of activated sludge.

Study of Adsorbability of the Colloidal Particles from Different Stages of a Conventional Water Treatment Plant

2011 ◽  
Vol 71-78 ◽  
pp. 3037-3042
Author(s):  
Na Wang ◽  
Jun Ma
Keyword(s):  
Water Treatment ◽  
Membrane Filtration ◽  
Colloidal Particles ◽  
Membrane Surface ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Sem Images ◽  
Filtration Experiment ◽  
Clarified Water

The adsorbability of colloidal particles from different stages of a conventional water treatment plant was studied with the assistance of micro-membrane filtration experiment. The microfiltration (MF) performance and the scanning electron microscope (SEM) images of the foulants on membrane surface were investigated. The results showed that the particles in the ozonated water (OW) had the strongest adsorbability, and stronger than that in the clarified water (CW); and the particles in the sand filtrated water (SFW) had relatively weaker adsorbability than that in the raw water (RW). The particles in the sand filter backwash water (SFBW) were mainly consisted of detached aggregates and had weak attachment with the membrane surface.

Interactions of Sewerage and Waste-Water Treatment: Practical Examples in The Netherlands

1993 ◽  
Vol 27 (5-6) ◽  
pp. 1-9 ◽  
Author(s):  
J. H. J. M. van der Graaf
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
The Netherlands ◽  
Water Cycle ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water System ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Small Scale

Various interactions of sewerage and waste-water treatment are discussed for the typical situation in the Netherlands. Sewerage and waste-water treatment are no longer necessary when each house has its own integrated waste-water system; however, costs seem to be high. The same applies for small-scale waste-water treatment versus centralisation. However, centralized waste-water treatment plants suffer from specific problems due to high fluctuations, not only in hydraulic but also in biological load. With stringent effluent standards the need increases for complete treatment instead of by-passing the peak flows. Besides, the application of buffering tanks may change in favour of an increase in the hydraulic capacity of the waste-water treatment plant. Finally, a new, integrated, attitude on water-cycle problems must be advocated.

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