Effects of Ca2+ on biological nitrogen removal in reverse osmosis concentrate and adsorption treatment

摘要

This study aims to investigate the effects of calcium ions present in the reverse osmosis (RO) concentrate on the removal of nitrate nitrogen and the absorption process of calcium ions using various carriers. The results of the analysis show that the denitrification of nitrate nitrogen delayed upon the injection of calcium ions at concentrations 500 mg/L. The adsorption of calcium ion was investigated by the development of adsorption isotherm equation, and aerobic granular sludge was found to be excellent. (c) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.