2-4-2020: Article in Trouw about CO2 emission waste processors and a link to VSGM READ THE ARTICLE IN TROUW HERE

31-3-2020: VSGM and MPG have signed a cooperation agreement in which both parties indicate that they aim to expand the further application of Neutral as a product in the circular economy

News item MPG-VSGM

VSGM news item

VSGM and MPG have signed a cooperation agreement in which both parties indicate that they aim to expand the further application of Neutral as a product in the circular economy. The aim from an environmental perspective is to make the biggest possible contribution.

VSGM BV has been busy for several years now with the introduction of the so-called MID MIX technology in the Dutch market. Using this technology, organic and inorganic sludge is processed into a secondary raw material for the construction industry.

By adding a limited quantity of quicklime (CaO) to the sludge, the processes of encapsulation and solidification are started in two reactors. Because of the exothermic reaction, moisture is expelled and almost all harmful substances (including heavy metals present in sludge) are encapsulated in new calcium compounds at molecular level. Under natural conditions, no leaching from these substances is possible. That is why the new material – called Neutral – is very suitable for use as a raw material in the construction sector.

In 2019, at the initiative of several water boards, STOWA commissioned engineering company TAUW to carry out an extensive evaluation of the technology. All tests in that study were carried out using the test / prototype installation of VSGM which is operational at the Attero site in Wilp.

In the already published report, STOWA concluded that: “The MID MIX concept is a promising new alternative to sludge final processing. The MID MIX technology requires relatively limited investments and is easy to scale, which could make it an ideal technique for dealing with the current shortages in the final processing capacity. Moreover, because the technique emits very little NOx, it is relatively easy to obtain a permit for an installation.”

A point for attention that emerged from the investigation: How can the guarantee be given that all the output materials produced (Neutral) can be put to good use?

The produced Neutral (still a waste product during the test period) has in the meantime been used commercially, through the mediation of Conovation from Someren, in various tests in the Netherlands as a raw material for the construction industry – for soil stabilisation, as a cement replacement, filler, etc. Based on the results from these trials, direct market demand is already estimated at around 50,000 to 60,000 T annually. All the materials produced meet all the requirements and wishes of the circular economy. Various certification programmes are running within the construction industry and it is expected that a number of certificates will be issued this year.

The MID MIX technology can certainly process larger quantities of sludge. The combination of a low investment, a particularly favourable environmental score and a high degree of flexibility makes MID MIX very attractive. If the processing is scaled up further, the question will once again be asked: What to do with really large quantities of Neutral? The processing of 300,000 T of water board sludge would, after processing with MID MIX technology, result in the production of approximately 200,000 T of Neutral (figures on an annual basis).

To ensure the circular application of Neutral, VSGM is already working with a number of selected partners such as the aforementioned Conovation. After all, it is important to be able to give potential MID MIX users a purchase guarantee (with a positive value) for Neutral.

As indicated at the beginning of this news item, this group of collaborating companies will be expanded with MPG BV from Heijen – MPG originated in 2013 from a collaboration between Mobicem and AVG. While Mobicem specialised in cement, marine transport and mixing installations for infrastructural works, AVG was active in the transport and building materials sector, infrastructure and explosives clearance. Two diverse companies that, in 2013, had a joint need for a mixing installation for dry powders and mortars. This gave rise to MPG, which quickly developed into a serious player in the world of special binders and mortars. (

The tangible result of the cooperation will be the realisation of a calcination (“Reborn”) installation at the new MPG location in Heijen. With the calcination process, it will be possible to convert the Neutral into a secondary quicklime (CaO). This circular quicklime has a CO₂ “footprint” that is approximately 70% lower than that of ordinary quicklime and also has very high-quality properties.

Director of MPG, Mr Gerrit Drenth; “The zoning plan for the site in Heijen allows for such an operation and the permit process is already underway. The entire process fits in perfectly with MPG’s strategy – supplying high-quality raw materials and building materials with the best possible environmental score. The proposed plant would be able to process approximately 100,000 T of Neutral on an annual basis into perfect secondary quicklime. In addition to this process, the plant can also be used for the additional drying of some other raw materials from our range. Our goal is to be operational by the end of 2020.”

Mladen Filipan from VSGM: “With this collaboration we have further expanded the guaranteed sales of the Neutral for our MID MIX users. With this extra sales channel, even large sludge producers can be assured of a circular application of their end product. As a result of this and other collaborations, we can process more than 200,000 T of Neutral per year into a reusable raw material/building material for our MID MIX users. The ultimate goal is to realise an even more extensive platform of circular applications.” “It is expected that a number of other companies will soon formally join this platform. Concrete talks to this end are already underway.” Filipan concludes.

9-1-2020: Stowa presented the report about the MID MIX technology on 9 January 2020. You can DOWNLOAD the FULL report here

7-2-2020: On the website Utilities, there is also an article about MID MIX READ MORE ON THE WEBSITE UTILITIES

23-1-2020: An interesting article on AGRO & Chemie about MID MIX technology READ MORE ON AGRO & CHEMIE

23-1-2020: “Investment of Oost NL in innovative, circular solution for sludge from sewage and water treatment with very low CO2 and almost no nitrogen emissions” according to the Oost NL website. READ MORE ON OOST NL

16-1-2020: VSGM introduced a sludge processing process MID MIX in the Netherlands in 2018. The results from field trials with sludge from four water boards at the pilot plant in Wilp are promising. There is also a great deal of interest from the building materials market to apply the white powdery end product produced by the process in building materials READ MORE ON WATERFORUM

13-1-2020: According to Stowa, who supervised the research, the technique can help to fill the shortfalls in sludge processing capacity. Dutch water boards want to consume less energy, save on costs and recover raw materials. READ MORE ON H2O WATERNETWERK

19-12-2019: Import levy on foreign waste will continue: READ MORE

2-10-2019: The developments with sludge processing in water board country are continuing. A nice technique that makes a useful application of sludge possible: READ MORE

10-7-2019: Feasibility study PACAS in combination with dosing iron compounds, IPMV theme Pulverised Coal: READ MORE