The ion-exchange process recovers the nutrients in the form of crude fertilizer by using adsorbents like zeolites, which can recover about 100 mg of nutrients per gram of zeolite . To regenerate the zeolites after recovering crude fertilizer, a brine solution was used. The key ingredients of this process include zeolites and regeneration solution, at the same time, majority of energy was consumed in pumping the zeolite bed and for regeneration activities. Microalgae, the third-generation feedstock, was considered as the future of biorefineries as diverse bioproducts and biofuels can be produced from it. The WW after secondary treatment was used for microalgae cultivation. The growth rate of microalgae used in this study was 1 g/d/L of wastewater treated, which was based on .