Sand-Cycle receives positive feedback in Norwegian pilot research

Sand-cycle receives positive feedback of researchers that have used Sand-Cycle in their pilot testing with continuous sand filtration at WwTW Gardermoen in Norway. They are enthusiastic about the use of this tool and reported their positive feedback.

International Water Association (IWA) publication

The research, executed on behalf of the Regional Research Council of the city of Oslo, focused upon nitrogen en phosphorus removal in a continuous sand filter after MBBR treatment. Very low effluent levels were consistently established; results have been published by IWA in the 80th Volume, Issue 2, of Water Science & Technology (see this link: to read the full article).

Robust and easy to use tool

The research team indicated Sand-Cycle to be a very convenient tool for monitoring good operating filter conditions. The results are reliable and, in addition, Sand-Cycle contributed to the quality and intensity of the research. Quick interventions were possible, once Sand-Cycle detected process anomalies, reducing valuable research off-time. These positive experiences with Sand-Cycle confirm what other users already have experienced. Sand-Cycle frequently receives positive feedback from other (inter)national references.

Sand-Cycle dashboard

The Sand-Cycle dashboard below clearly illustrates the recorded distinction between a good and bed performing filter. The scatter between the average and the standard deviation values indicates the homogenity level of the system. Greater spread (thicker band) implies that few parts of the filters flow significantly faster or slower. This case of thick band also depicts relatively lower performance level of the filter.

The figure above is a Sand-Cycle dashboard of the pilot at RWZI Gardermoen on March 1st 2018. The graph shows the average sand circulation speed (blue line) during 48 hours and the related standard deviation (upper and lower gray lines). In this way, this graph gives realtime insight whether the filter is running good or bad.







BW Products participates with Sand-Cycle in Export Carrousel XII

BW Products has the ambition to introduce her Sand-Cycle technology worldwide. Therefore, BW Products enlarged her network within Europe earlier this year by starting a collaboration with Nordic Water. To explore the possibilities outside Europe, the company is now going to exploit the expertise of the project Export Carrousel.

Export Carrousel XII

BW Products participates with Sand-Cycle in the Export Carrousel XII. As a result, BW Products will work together with a group of international students of NHL Stenden University. In the coming six months they will explore the market in Southeast Asia for Sand-Cycle. In this part of the world a lot of continuous sand filters have been realized. Therefore, the potential market for Sand-Cycle is enormous. Moreover, all those filters can improve their performance by installing Sand-Cycle as monitoring and control tool. Consequently a significant decrease in operational costs is feasible. In addition, Sand-Cycle is suitable for all types of continuous sand filters.


During the first week of the new university year 2019-2010, the kick-off of the 12th edition of the Export Carrousel took place in the Kanselarij in the city of Leeuwarden. The goal was to introduce the companies and their products to the students and vice versa. For this purpose, the organization prepared presentations and round the table conversations.

Representing BW Products, CEO Hans Wouters explained more about Sand-Cycle and the related export question BW Products has to the students. The group of students will use several methods to research the potential market in Southeast Asia. For example, they will be executing a broad sector scan. In the end, the expected results will be an easy to read export plan. In order to achieve this end product, the students are assisted by their mentors of NHL Stenden University, external advisors and employees of BW Products.

The project Export Carrousel forms the specialization minor International Business. The student are following this minor at NHL Stenden University. The Province of Friesland supports and made this project possible.

BW Products and Nordic Water bundle knowledge and innovation


Sneek/Noordwijk, March 15th 2019

BW Products and Nordic Water bundling knowledge and innovation

Added together they have years of experience in the field of separation technology in general and with continous sand filtration in particular. Therefore, BW Products and Nordic Water have decided to start a collaboration during the beginning of 2019. As a result both parties get access to each others products. The goal is to offer clients complete solutions in a faster and better way. 

Already both partners notice that this collaboration is leading to a lot of synergy. This synergy in projects, research and product development is of great advantage for the joint customer base. One example is the removal of medicine residues from water. An actual problem, wherefore the world is asking solutions. For research projects in this field, the available knowledge and experience that BW Products and Nordic Water have with ‘downstream continuous filtration installations’ can be optimally utilized. One of the research projects will start soon at the demo-site of the WaterCampus in the RWZI Leeuwarden.

Hans Wouters of BW Products and Ronald Piepers of Nordic Water Benelux are delighted with the collaboration. “Our combined knowledge is huge, so this is good news for our clients”, according to Hans. Ronald adds: “For BW Products it also means that they get a very mature partner, with a lot of knowledge, an enormous network in Europe and exceptionally well in sales and service. Also, both parties are now able to assist each other in inventing and developing new solutions.”

Since 2017 BW Products has introduced the Sand-Cycle technology to the market ( Sand-Cycle was developed monitor continuous sand filters optimally and to optimalize the treatment proces. The technology becomes now available for Nordic Water and can be implemented in current and new installations.

During the recent AquaNL 2019 fair, both parties confirmed there collaboration during a joint press moment and a firm hand shake (see this news article of the Water Alliance)

More information is available by contacting:

Hans Wouters
BW Products BV
+31 515 79 65 50 / + 31 650 74 85 73

Ronald Piepers
Nordic Water Benelux BV
+ 31 71 763 06 21 / +31 6 230 550 96


Friese “water tech” voorop bij internationale ambitie

Gedeputeerde Sander de Rouwe met vier ondernemers in discussie, op bezoek bij Acquaint in Leeuwarden. 

Nog niet zo lang geleden lichtte Hans Wouters, CEO van Brightwork BV en BW Products onze slimme innovatie Sand-Cycle ( toe aan gedeputeerde Sander de Rouw. Tijdens deze door Water Allianc georganiseerde kennismaking, hebben wij samen met 3 andere Friese WaterTech frontrunners Acquaint B.V.., Wafilin Systems B.V.. en Hydraloop Systems – Smart water savings, onze bedrijfsvisie, producten en (export)uitdagingen gepresenteerd. Zie deze link voor het artikel sandcycle watertechnology

Sand-Cycle wint Water Industry Award

In een druk bezochte bijeenkomst in Birmingham ontvingen Chris Heslegrave van Aquabio en Hans Wouters de Water Industry Achievement Award voor de meest innovatieve technologie van het jaar. De jury waardeerde de eenvoud van de vinding en de waarde ervan voor de water industrie. Deze Award is een mooie erkenning voor de vinding.


Water Industry Achievement Award 2017 nominee

BW Products together with Aquabio (UK) are selected finalists of the Water Industry Achievement Award 2017 in the category “Most Innovative New Technology of the Year”. We are selected for our latest development “Sand-Cycle”, successfully introducing RFID technology in the water treatment industry.

The Award is used to underline the industry’s leading innovations and best practices in the market today. Please refer to the list of nominees we are competing against:

On May 23th 2017 the Award Ceremony will take place in the VOX Conference Centre in Birmingham, UK

Logo Award Industry UK

Sand-Cycle succesfully introduced at WwTW Franeker filter plant

A real time MBF monitoring system has been succesfully implemented at the Franeker municipal waste water treatment works operated by Wetterskip Fryslan in the Netherlands. The system has been developed in close collaboration with Brightwork ( and allows the operators to continuously monitor the actual filter operational status: "Installing SandCycle showed to be the best way to get the most out of my continuous sand filters. Clear dashboards show extremely effective to optimize filter operations. Direct savings are now at hand". The monitoring system may be applied at all continuous sand filter plants: e.g. AquaBiofilter, AstraSand, DynaSand, HydraSand etc.

Please visit for more information.