| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water leaning technology for the river and the like which enhances a sticking ability of microorganisms and algae as well as enhances a decompositional ability of organic materials with microorganisms and algae by reducing a rate of water stream coming into contact with a mortar containing charcoal in a water purification technology using the mortar containing charcoal. SOLUTION: A charcoal containing mortar layer 10 having charcoal incorporated into mortar is formed on the surface of a mass 1 (a mass of concrete, a mass of natural stone, a mass of rubble or the like). This mass A for water cleaning is installed at the bottom of a river and the like in numerously accumulated state.</p> |
