조류와 박테리아 비가 활성조류공정에 미치는 영향

Abstract

The purpose of this study is organic compounds and nutrients removal by proportion of Algae and Bacteria mixing. This study is involved the principle of Activated Algae System by Ross.E Mckinney in 1992.

This study was conducted by two steps. First, we operated batch reactor at 8 case of A/B ratio. It was continued for 200 hours and 10 times sampling. Second, cultivated Heterotrophic Bacteria and Autotrophic Bacteria, then, mixed it together, and then mixed it with Algae. It has influent, effluent every day. HRT & SRT of semi-continuous reactor is fixed by 6, 8, 12 day.

In accordance with Algae/bacteria ratio, through the batch reaction, , TN, TP, and removal efficiency of the reaction according to the elapsed time was calculated algae/bacteria removal efficiency according to the proportion of each relation was derived. In addition, algae/bacteria ratio when compared with the initial value as a whole showed a tendency to increase. Injected into the influent at the beginning of the batch reaction, and no feeding the injection until the end of the reaction. So algae/bacteria ratio increased, the because of the reduction of endogenous respiration by the bacteria and growth of algae.

In the continuous reactor under HRT and SRT, and algae/bacteria ratio of organic matter and nutrient removal efficiency due to evaluate. Due to low precipitation reactions of algae in continuous reactor, HRT and SRT could not be set differently, the two factors were the same value. Similar to the batch reactor, in accordance with HRT, and algae/bacteria based on removal efficiency of each water quality item, and derive equations, and the algae /bacteria ratio evaluated the changes.

About removal, if, bacteria and HRT value was larger, the removal efficiency was relatively good. About and TN, if more algae, and HRT, removal efficiency showed a good trend but it was not show significant differences. has showm similar tendency with removal efficiency. About MLSS in the reactor, it increased sharply after 1 day, and since then it has maintained a constant value.

In accordance with various algae/bacteria ratio, we did a experiment about sedimentation, The result of the sedimentation was good. So we can say this wastewater treatment process are applicable the actual process.