Netherlands: With the use of lime, separation of digestate can be much more efficient

Published 2021년 4월 2일

Tridge summary

HoSt, in partnership with Saxion University of Applied Sciences, has developed a method to recover minerals, specifically nitrogen and phosphate, from digestate over a period of three years. The process involves using lime, which has been shown to enhance separation efficiency, making it economically viable. The research also explores the use of CO2 in biogas to further optimize nitrogen recovery. The design for this separation process, which is more cost-effective than traditional methods, has been delivered and is suitable for implementation in biogas plants.

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Original content

In collaboration with Saxion University of Applied Sciences, HoSt has worked for 3 years on a method to recover minerals from the digestate. Basic research has been carried out on a small scale in the laboratories of the university of applied sciences. It has been found that the use of lime significantly improves the separation efficiency. With the use of lime, it appears to be economically viable to recover nitrogen and phosphate from digestate as separate raw materials. We also looked at the use of CO2. By making smart use of the CO2 present in biogas, it is possible to further optimize the recovery of nitrogen from the digested state. Based on the project, the separation process for digestate has been optimized and a design has ...

Source: Agri Holland