| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for purifying water quality by economically, safely and easily suppressing the propagation of algae such as green algae, blue green algae and diatoms in a closed water system.SOLUTION: Provided is a water purification method in a closed water system characterized in that a microorganism preparation essentially consisting of dry particulates obtained by fermenting a natural plant with a hay bacillus, in which the number of bacterial cells is 1×10pieces/g or more and the average particle diameter is 0.8 mm or lower is charged to a closed water system in the ratio of 100 to 10,000 g per 300 m.</p> |
