RevoCaP Q&A

During our RevoCaP webinar on November 7, we received a number of questions from the viewers that are answered below.

Please have a look at our data sheet for the P product with typical values: revocap2509_3.pdf.

The metals analysed are based on legal and customer demands for both feed and fertiliser market.

The latest pilot trials showed a concentration of 1 mg Selenium per kg of RevoCaP. We can measure other essential elements, if needed.

Ash2Phos is designed and optimized for sewage sludge ash, but from a chemical perspective, it would certainly be possible to mix in other types of ash. However, the process also requires aluminium and iron, not just phosphorus.

Moreover, the profitability is linked to the phosphorus content, which is why, for example, it is not attractive to mix in ashes that would dilute the phosphorus concentration.

From a legal point of view, we will only be able to use raw material that is accepted by the FPR regulation (EU Regulation 2019/1009), since we are aiming at a CE marking for RevoCaP and also to fulfil the legislation regarding organic farming.

Yes, we aim at having a CE mark for RevoCaP and go through the certification according to Regulation 2019/1009. It is correct that we need to fulfil the CMC 13 and do the Module D1 conformity process¹.

¹CMC 13 in the Fertilising Products Regulation (EU) 2019/1009 refers to one of the Component Material Categories (CMCs) that define which types of materials can legally be used to make an EU fertilising product that can be CE-marked.

There are several studies ongoing on the fate of PFAS in incineration, which have concluded that PFAS does not end up in the ash, however shorter chained PFAS can end up in the scrubber water and need to be handled correctly in the incineration plants handling sewage sludge ash.

The incineration of the sewage sludge will detoxify it from microplastics, organics and pharmaceuticals. We have measured PFAS and total fluorine in the ashes and not found any, which also means that we cannot measure PFAS in RevoCaP. We will track TOC, PAH and Dioxins in the ashes as well as PFAS in the final product to fulfil all safety and legal limits. The phosphorus product RevoCaP is produced in the Ash2Phos process via chemical recycling, i.e., the sewage sludge ashes are not used directly as a fertiliser. Also, the Ash2Phos process has a detoxification step that removes almost all heavy metals from the sewage sludge ashes.

The HCl supply for the Ash2Phos plant in the DOW ValuePark is supplied by new partners, delivering the acid to Schkopau. The project continues as planned and there are no effects on its feasibility.

RevoCaP is not soluble in water but is has a solubility of app. 80% in neutral ammonium citrate. We are currently conducting trials with RevoCaP, which will provide us with more detailed information about the product's solubility at different pH levels, since pH and general soil condition is influencing all fertilising material’s efficiency once applied.

We are currently testing different techniques and binding agents to achieve the best outcome in terms of usability in different fertilizing technologies as well as yield performance. Once completed we will inform about the outcome by end of 2026.

RevoCaP Q&A

It seems you have found a very efficient way of extracting and thereby reducing toxic metals, which toxic metals have you been focusing on?

What is the selenium content in your final product, and does it vary depending on source? Also, what about other essential elements?

Is it only sewage sludge ash you plan to use as raw material for the Ash2Phos plants?

RevoCaP will be CMC 13 in the FPR Regulation (1019/1009). For any product using CMC 13 a Modul D1 conformity assessment will be necessary. Will EasyMining do the conformity assessment for RevoCaP?

Having read in the press in July 2025 that DOW is stopping production of chlor-alkali products in Schkopau by April 2027, how will this influence Easy Mining’s OPEX and overall feasibility?

Plant availability is linked to a material’s solubility in water / citric acid, how does RevoCaP react? Reaction with Fe and Ca in the soil solution?

Do you have results, regarding the density and particle size distribution in fertiliser granules/prills? How well do they fit existing spreading technology? Are there results available, showing the stability of the prills compared to competitors, e.g., powder blends, during handling and transport.