Simultaneous Recovery of Struvite and Irrigation Water for Agricultural Purposes Obtained from Dewatering Liquor through Electrodialysis

Wastewater contains resources, which can be recovered for secondary use if treated properly. Besides research in zero liquid discharge solutions, the aim of study was a simultaneous recovery products from wastewater treatment plant’s dewatering liquor. To specific, we investigated struvite and irrigation water using electrodialysis (ED) laboratory experiments. Two were obtained ED—concentrate diluate. The concentrate precipitated to obtain struvite. On average, 11 g wet precipitate (including 17.58% dry solids) 1 L concentrate. Crystal phases confirmed by powder X-ray diffraction (XRD), with showing 94–97% struvite, while remaining 3–6% identified as hazenite. average yield crystal 1.76 g. Both hazenite may further used fertilizer. Next, suggest second ED product, diluate, it meets requirements. Attention paid concentrations dissolved solids (DS) decreased an 93% compared input values In line observed Czech or EU standards indicators, say that diluate agriculture, namely (Category I—water suitable irrigation).