The charcoal brick made from beer lees (CBBL) was investigated as the material for purification of lake water. The beer lees containing 67wt percent water were first dried and then the dried beer lees were pressed at high temperature and pressure to make beer lees brick without any binder. The beer lees brick was carbonized in a low oxygen atmosphere to produce charcoal brick. The CBBL is useful for the carrier of microorganisms and it is possible to reduce soluble organisms and soluble nitrogen as same as charcoal. The CBBL contains phosphorus at the ratio of about 2wt percent, which is soluble in water. The addition of 20wt percent CaCO_3 to the dried beer lees in the pressing process is beneficial to prevent solubilization of phosphorus in the CBBL. The CBBL does not have a weak point that it is abased in the purification column compared with the charcoal used in usual water purification.
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