Removing Aggressive Carbon Dioxide From Water Using Melaphyre Bed

Abstract

The experiment was based on filtration of the highly aggressive water through the melaphyre bed. The quartz bed was non-reactive reference material. The aim of this work was to determine the ability of the melaphyre to remove aggressive CO 2 during the chemical reaction. It was noted that a decrease of acidity of the filtrate in comparison to the feed and an increase of its alkalinity and pH. It was calculated that until the moment of exhaustion of the de-acidifying properties of the melaphyre, maximum amount of bound CO 2 added to the water was 29.7 g CO 2 /L of the bed, and maximum amount of the aggressive CO 2 removed from the water was 33.3 g CO 2 /L of the bed. Regarding very high content of the aggressive CO 2 (116 mg/L average) in the feed only 28.76% of this component was subject to transformation into bound and affiliated CO 2 in the filtrate. For the melaphyre bed the CO 2 loss from the experiment system following from desorption was 7.80% of the total load of CO 2 added with the feed. On the quartz bed the loss was slightly lower 4.56%.

Analysis of the influence of rapid filter cycle interruption on filtrate quality

“…Depth filtration, however, is not included among them, even though it is an indispensable process, which is sometimes used as a pre-treatment of membrane, biological or activated carbon filters (Uragami 2017), sometimes preceded by in-line flocculation, but most often used as the main process for the reduction in fine particles and flocs remaining after flocculation followed by sedimentation (Hendricks 2001). There is a number of filtration materials that are used, such as quartz, anthracite, activated carbon, garnet, glass, melaphyre, zeolite and diatomaceous earth (Michel 2017, Logsdon 2002. Quartzite sand, however, is still the most popular single-layer material, anthracite/ quartzite is a double-layer configuration and anthracite/ quartzite/garnet a triple-layer configuration.…”