生物濾過法による富栄養化した池沼の藻類除去

概要

論文の詳細を見る
Biological filter treatment process with contact media such as plastic resins, ceramics etc. were used in water and wastewater treatment. However, there have been few reports on its application to environment restoration.The purpose of this study was to evaluate the removal efficiency of algae in a polluted pond using biological filter treatment process. Two experimental systems were conducted to remove algae for promoting tansparency of polluted water in Oozutsumi pond, locating at south of Sendai city. One is called as horizontal flow system packed with ringlace as a contact medium, the other is upflow filtration system packed with nonwoven fabric.It was observed that partial of Chlorophyll-a removed in the system was degraded and preyed by Protozoa and Metazoa attached on the biofilm in both systems. 50% of attached Chlorophyll-a was removed due to back-washing. It was also found that the removal efficiency of diatoms was much higher than that of green algae because of the difference of adhesion potential to biofilm of the two species of algae. In addition, horizontal flow system showed effective to remove green algae.
社団法人　日本水環境学会の論文
1997-01-10