Agri Separation Technologies B.V.

Agri Separation Technologies B.V. has developed a Manure Separator which, without the use of chemicals, gives extremely good results, especially on removing phosphorus and nitrogen. Per ton of fresh manure a cake fraction is derived of  ~ 150 kg. In this cake fraction 87% of the phosporus is present and 30% of the nitrogen resides. The process is completely mechanical. No chemicals are being used at all.

Agri Separation Technologies is a subsidiairy of Evodos B.V. The AST-Manure separator is being developed through a combination of the unique Evodos centrifugal technology and some classical proven technologies. It works without chemicals and with a low energy consumption. The separation efficiency (Trennscharfe) is extremely high. The cost of processing a ton of manure are low.

The AST-Manure separator has been thoroughly tested at the Agricultural University of Wageningen (WUR), The Netherlands. The WUR-university owns a testfarm at which the testprogram has been executed. The overall conclusion of the WUR-report is:

Quote: “The results show extemely high separation results for P-total, dry matter and organic material. The separation efficiency for P for the complete process is 87%”.

The test is executed with manure from the WUR-testfarm: proefboerderij Sterksel. This farm has a mix of sows and pigs. The testresults are the following:

Of 1002 kg manure 154 kg is extracted as a cake fraction. This cake fraction is stackable. It has a dry solid content of 25%.

Of the incoming untreated manure the following components are being concentrated in the stackable cake fraction:

component	separation efficiency
N-total		29,50%
P-total		86,80%
K-total		14,60%
NH4-N		24,00%
Dry matter		63,60%
Raw/harsh ash		49,70%
Organic matter		68,80%

The Chemical Oxygene Demand (COD) of the liquid fraction is reduced  to ~ 50 gr/liter after processing with the AST-technology.

The AST-manure separators are built in a 20 ft container. They are on the market and ready to deliver.

For more information you can download the leaflet of the AST-Manure separator. You can also download the complete testreport of the WUR / testfarm at Sterksel, however this is in Dutch.

1. Leaflet AST-Manure separator

2. Testreport Testfarm Sterksel (Dutch)

Figure: Impression of the AST-manure separator with a roll-container below it

Leasing of Evodos equipment now possible

Now, it's possible to lease the Evodos equipment on an individual basis, through a leasing facility arranged by Evodos. Through this facility we make it easier for you to finance your Evodos equipment. You can improve your pay-back periods and shorten your balance sheet at the same time.

We are proud to have have been able to arrange this facility. This caters for the cost of capital, not the operations. Maintenance contract can be provided separately by Evodos or its distributors.

It is posssible to get ownership of the Evodos machines at the end of the leasing period.

The facilities apply to all of the Evodos machines, including the specific ones brought to market by the subsidiaries of Evodos. Examples of these are the Algea Harvester machines and the Manure Separation machines.

Peter Albrecht, a former senior banker and the financial and strategic advisor of Evodos, has arranged the initial contacts with the lease companies.

Evodos is currently active in arranging a so called Vendor Lease Agreement, to make it even easier for you. We will keep you informed about the progress.

Technotopic: High separation efficiency explained

The Evodos technology uses the Spiral Plate Technology (SPT) as separation mechanism. By using the innovative SPT technology, particles are separated from a mixture with high separation efficiency. Independent of their consistency or form and in a mechanical way.
Processing mixtures with greasy/sticky soft solids give especially good results. Because of the high separation efficiency the usage of flocculants or coagulants becomes absolete in most cases.

At the www.evodos.eu website you can see what the results are for a large number of applications. In this article we go deeper into he reasons for these spectaculair separation results.

The Evodos SPT technology uses curved vanes which can articulate to the verticular ax at which they are mounted. At the outer side of the vanes is a drum which moves at exactly the same speed as the vanes and the vertical ax. The vanes touch the drum, which fixates their position. Two vanes, together with a piece of the ax and a piece of the drum form a bananashaped space. All sides of this bananashaped space do not move from each other during the separation process, during which the bananashaped space itself turns at high speed.

Figure: Rotor with SPT-vane package

The amount of bananashaped spaces can be chosen. This is dependent on the number of vanes which are mounted in the drum.
After the mixture has been brought to speed it flows slowly from the bottom to the upper part through each bananashaped space. The speed is set in such a way that the flow of the mixtures is laminair.

The distance each particle has to travel before hitting one of the vanes is only a few millimeters, because of the small distance (measured in the direction of the G-force) between two vanes.

Important: The flow direction of the mixture is vertical. De direction a particle moves in comparison to the flow is horizontal. Therefore no turbulance and/or cross flow appears.

The combination of laminair flow, low speed and particles moving in a direction perpendicular to the flow of the mixture leads to the fact that also very small particles will be separated effectively.

Comparison with other technologies:
Using the geometry of several machines (decantercentrifuge, stacked disk separator) the distance is calculated which a particle has to travel in the direction of the centrifugal force. Dividing this distance with the delay time in the respective machines gives the global speed (which we name fall speed) which the particles need to develop at minimum to hit a rotating part. The table below gives these different speeds:

It is interesting to see that the fall speed of the Evodos technology is very low in comparison with other techniques. This low fall speed contributes to:

- High separation efficiency,
- No use of flocculants or coagulants (the exception of course is for solved
  matter),
- Low energy consumption and low wear.