Nitrate green removal by fixed-bed columns packed with waste biomass. Modelling and friction parameter estimation
Natural and waste waters pollution by nitrates is considered a major environmental problemdue to the possible consequences on human health and on water bodies through eutrophi-cation phenomenon. Hazelnut shell were employed as packing material in a large lab-scalecolumn for the removal of nitrate from wastewaters, comparing the process performanceswith those obtained in batch system. A nitrate removal efficiency up to about 67% wasobserved in batch mode at low pH and with a sorbent mass concentration of 8 g/L with0.5 mm size.