Biofiltration as a treatment technology in water and wastewater purification ... Biofilters contain filter medium grains (e.g., sand, granular activated carbon) that are covered with biofilms.
Water straight from ... and fluoride added by water treatment plants, and even heavy metals such as lead, chromium or arsenic (in trace amounts). The activated carbon filters used in most pitchers ...
With an activated carbon system, impurities are filtered ... They set the standard for water treatment systems,” Pesanti said. The EPA also provides guidance on its website.