本研究主要為探討室內景觀水族箱水質吸附過濾系統淨化水質之特性比較，實驗係利用一般室內景觀水族所常用人工纖維過濾棉、顆粒活性碳、陶磁環、氧化鐵覆膜陶磁環等過濾材質所組合而成之四套系統，藉以比較各項組合系統對含氮污染物降解去除之效能。由實驗結果可知系統之導電度起始值分別為619μS/cm、622μS/cm、643μS/cm、639μS/cm，在經歷214日後，導電度之分別增加為1900μS/cm、1846μS/cm、1885μS/cm、1942μS/cm，顯示各系統所備置的水質過濾淨化設備無法完全去除水中的污染物，造成水質惡化，繼而使實驗體死亡。本研究所測得各系統BOD可知平均值分別為1.44mg/l、1.03 mg/l、1.63 mg/l、1.18 mg/l，顯示並非景觀水族箱之污染之主要污染。
各系統之NH4+-N之濃度變化顯示於50日前各系統之處理效能皆十分良好，其後以陶瓷環為主之A、B系統的NH4+-N之濃度即開始上升，而經氧化鐵覆膜並未對其降解去除有明顯影響。本實驗中活性碳之C、D系統可持續維持低濃度之NH4+-N，至77日時，濃度始大於1 mg/l，其後方開始緩慢上升過程，雖然二者之趨勢相近，惟以C系統之效能最佳，可見人工纖維微生物培養棉之加入可增加高濃度NH4+-N之去除效能。由於本研究之主要NH4+-N來源是實驗體的排泄物，根據每隻試驗體之單位NH4+-N排放量=2.10mg/d推算各系統之NH4+-N去除率歷時變化，其結果亦顯示C系統之降解效能最佳。 To investigate the water purification of filter systems in the aquarium, different material; ceramic rings with and without ferric oxide coating, granular activated carbon and artificial cotton fiber, were used to form 4 sets of filter systems with different combinations. There were 100 Zebra fishes for each aquarium. The degradation of nitrogen contained pollutant was mainly the topic to be discussed. From the results obtained, the electrical conductivities were initially 619μS/cm, 622μS/cm, 643μS/cm, 639μS/cm respectively and reached 1900μS/cm, 1846μS/cm, 1885μS/cm, 1942μS/cm after an operation period of 214 days. It showed that all of filter systems could not deal with the pollutant from the Zebra fishes or excessive feeding stuffs. The averages of biochemical oxygen demand (BOD) were 1.44mg/l, 1.03 mg/l, 1.63 mg/l and 1.18 mg/l respectively which would not be the main pollutant endanger the zebra fish or aquatic animal.
In the initial stage of 50 days, the removal efficiencies of NH4+- N for every system were quite good and the concentration maintained in a rather low level. And then, the concentration of system A and B whose filter system were mainly composed of ceramic ring with and without ferric oxide became to increase. It indicated that the ferric oxide coating did not offer the capacity to absorb the pollutant. For system C and D which were mainly composed of activated carbon and artificial cotton fiber, the concentrations of NH4+- N were larger than 1 mg/l after the operation of 77 days. The removal of different filter systems could be estimated from the unit NH4+- N release of 2.10mg/d for each zebra fish. The results of NH4+- N removal showed that the system C would be the best combination of water purification system.
