CARTIF Projects

ECOVITA

Research on struvite crystallisation process by consecutive solid-gas exchange stripping and scrubbing system. 

Description

The general objective of this project is to obtain a innovative technical process that allows the production of high quality ecological fertilisers based on struvite (MgNH4PO4·6H20) and ammonium sulphate ((NH4)2SO4), extracting the useful nutrients from digestates, that is to say, recovering phosphate and ammonium from digestate from anaerobic organic waste anaerobic treatment plants for the production of the above-mentioned high-quality fertilisers, in order to reproduce the industrial process derived from the research ina pilot unit that offers results that can be scaled up and reoriented.

Objectives

  • Design a production process for the recovery of phosphorus and nitrogen contained in digestate from agri-food and livestock waste.
  • Develop a prototype of the crystallisation process and the stripping process taking into account technical, economic and environmental criteria, so as to guarantee the optimisation of the operation and the final product in the step to industrial scale.
  • To obtain struvite pellets or granules in shape, size and durability suitable for further use.
  • To obtain a solid or liquid fertiliser (depending on the operation conditions) of ammonium sulphate with a propper presentation for its dosification.

Actions

  • Initial characterization of a digestate current.
  • Design and development of the new intregal nutrient recovery process
  • Construction of the pilot plant and conection to the digestate line.
  • Tests in real conditions in relevant environment. 
  • Study of the struvite characteristics as fertilisers and of the final effluent of the process.

Expected Resultss

  • Operational pilot plant for the demonstration of the process of recovering phosphorus and nitrogen contained in digestate from agri-food and livestock waste.
  • Knowledge on how to prepare a fertiliser in the appropriate dosage format (solid or liquid) for field application.

R&D Line

  • Nutrient recovery from residual currents and second life cycle as fertilisers (struvite, digestate, manure stabilised biologically).

Clients

ICE R&D Projects

04/10/VA

Total Budget: 939,928.74€

CARTIF Budget: 333,307.70 €

Duration: 19/06/2023 – 31/08/2025

Responsible

Jesus Mª Martin Marroquin

Division of Agrifood and Processes

jesmar@cartif.es

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