固定化小球藻對循環水養殖系統水質處理之影響

摘要

The main purpose of this research was to investigate the effect of the water quality by using immobilized Chlorella sp. in a recirculating-water culture system. The actual cultivating tests with the reciculating-water culture system with the hydraulic retention time (HRT) 2 hr were performed. These tests included the comparison with no algal beads and the influence of the higher initial ammonium concentration. The testing results showed that the algal beads could effectively remove ammonium and nitrite and obtained lower concentrations of the peaks than those with no algal beads happened in the system. The average ammonium and nitrite removal efficiencies of the algal beads in the actual tests were about 65 and 6%, and the average ammonium and nitrite removal rates were about 26.61 and 48.29 mg/day, respectively. When the ammonium concentration was higher during the initial testing section, the average ammonium and nitrite removal efficiencies of the algal beads would decrease to about 22 and -1%, respectively. However, the average ammonium removal rate of the algal beads was raised to about 32.25 mg/day, while the average nitrite removal rate was dropped to about 6.73 mg/day.