DESIGNING CLINOPTILOLITE-RICH TUFF COLUMNS FOR ADSORPTIVE FILTRATION OF WATER WITH ENHANCED AMMONIUM CONCENTRATION

摘要

The objective of this study was to determine the feasibility at the laboratory, and to evaluate the pilot potential in the field operation for ammonium removal out of the drinking water with enhanced ammonium concentration by applying Slovakian clinoptilolite-rich tuff deposited at the Eastern Slovakian municipality Nizny Hrabovec. Detailed technological parameters (specific and shipping weights, porosity, sphericity, abrasion) were determined for the Slovakian clinoptilolite-rich tuff, and compared with some other foreign samples incl. common water treatment adsorption materials like active coke and silica sand. Kinetic dependence upon temperature, pH and flow rates by regenerant recovery were examined, and as much as possible analytical data from zeolite filtration and elution were collected to enable successful demonstration of laboratory experiments to the field. The zeolite ion exchange pilot installation (ZIEPI) with a hydraulic loading rate of 900 L/h was situated then at the field experimental facility of Water Research Institute in Vajnory, the closed vicinity of Bratislava, during autumn 1986.