NOVEL LOW-SALT-REJECTION REVERSE OSMOSIS (LSRRO) SYSTEM, INTEGRATING REGENERATED MEMBRANES AND AN ADAPTED PRETREATMENT MODULE FOR CONCENTRATING ORGANIC EFFLUENTS FROM THE BIOGAS INDUSTRY.

Project funded by CDTI under file number EXP-00157078 / CIIP-20221004

The Eurostars project “NEXT-REVOS” is made up of four partners working in similar fields and industries, but with complementary knowledge and experience. LEF Ingenieros acts as the consortium leader together with RED Inc., KMU, and KTL, all of them Korean companies.

The overall objective of the project is the development of an innovative process for the treatment of digestate derived from the anaerobic treatment of slurry. To this end, a pretreatment of the effluent after centrifugation has been developed, consisting of an ultrafiltration stage that allows the digestate to pass through a three-stage reverse osmosis system (LSRRO). This system combines the feed of each stage with the permeate from the subsequent stage in order to reduce osmotic pressure and energy costs, as well as to increase the efficiency of the reverse osmosis stages by reducing cleaning-in-place operations.

The streams generated by the process—the permeate and the concentrate from the LSRRO—are suitable for discharge to the environment or for reuse, and for use as biostimulants in the agricultural sector, respectively.

The goal is to be pioneers in the next generation of reverse osmosis systems for digestate concentration, offering an integrated, energy-efficient solution with maximum performance, versatility, and easy scalability.

The project has been supported by CDTI and by the European Union (Eurostars programme – Project No. 1946) through the European Association of Innovative SMEs.