Influence of confectionery wastewater pretreatment in vortex layer apparatus on its physical and chemical properties

The paper studies the effect of pretreatment highly concentrated wastewater from confectionery production in a vortex layer apparatus (VLA) on its physical and chemical properties, with aim further use as substrate for dark fermentation biohydrogen. Pretreatment VLA resulted 2.6-fold increase iron content 6.5% soluble oxygen demand after 3 minutes exposure. After VLA, an acetic acid decrease contents propionic, butyric caproic acids were observed. An mono- disaccharides was registered, exposure time physicochemical properties studied. concentration simple sugars makes promising improving process subsequent fermentation.