Treatment of Liquid Fraction of Digestate by Integrated Process Struvite Precipitation—Forward Osmosis

The research undertaken in this paper was aimed at determining the effect of struvite precipitation, one potential products that can be obtained during digestate management, on performance non-pressurized membrane process—forward osmosis (FO). using an integrated precipitation—forward process to treat liquid changes properties organic substances present treated solution (particle size distribution, ζ-potential) analysed as well. study conducted for fraction municipal waste biogas plant digestate. results demonstrate suitability recovering water from It found forward a pre-treated by chemical precipitation leads higher flux values and increased salt concentration receiving (from 0.5 3 mol/dm3 NaCl). There is practically no concomitant infiltration into solution. Therefore, use NaCl draw recovery highest volume per unit time. An analysis particle distribution shows removal macromolecular compounds mainly takes place simultaneously with struvite. increase solution, which allows greater recovery, resulted aggregation concentrated molecules.