Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial

A toolbox of methods must be available for the remediation lakes and water bodies suffering from eutrophication. One method suggested is hypolimnetic withdrawal based on a closed-circuit system. Prior to start pilot-scale test at Lake Hönsan, Sweden, laboratory trial with containers filled bottom sediment this lake was performed. peristaltic pump distributed equal volume four columns, two glass beads filter material Polonite, then back surface containers. The reactive medium (RFM) removed phosphate (PO4-P) efficiently (98.6%), despite relatively low influent concentration (390 µg L?1). control column beads, 2.9% PO4-P. anoxic sediment, containing 2.47 mg P g?1, released PO4-P, which indicated by increased in near-bottom water. redirected after RFM filtration had high pH (x¯=11.1); however, an equalization took place mass lower but still value (x¯=8.7) compared (x¯=7.02). This article reports pros cons full-scale system using proposed method.