- 期刊
循環水養殖系統之濾材物性與配置對水處理效率影響研究
Influence of Physical Properties of Biofilter Material and Equipment on Water Treatment Efficiency in Recirculating Aquaculture System
摘要
在綠環境生物產業發展主題中，以零廢污排放為最終目標的養殖系統用水如經適當處理後必定可再循環使用，而兼顧經濟、簡易操作及維護型的水處理設備之設計及其效率評估，與選用的濾材物性特徵有著密切關聯。本研究設計一套實驗流程，測試台製毛刷、日製繩材、美製雙星球型、米格型、葉片型、風球型及皇冠型等五種塑膠濾球，共七種不同的市售濾材，比較其充填成本、單位體積濾床之有效表面積、三種不同水力停留時間、二種不同充填率等物性之固型物與總氨氮的去除效率，且評估其經濟性。結果得知，毛刷的單位體積處理速率(g/m3/day)最高，其次是雙星球型及繩狀濾材。在充填成本方面，則以皇冠型最低，其次是毛刷，以葉片型最高。若以單位充填成本所能處理的速率(mg/m3/元/day)來看，則以毛刷速率最高，皇冠型次高，葉片型最低，雙星球型次低。且得知，有效表面積愈高者總氨氮的單位體積處理速率愈高。綜合上述，在濾材部分，明確得知本土產毛刷為一極適用的生物濾材。
並列摘要
Accumulation of solids and ammonia nitrogen (TAN) in aquacultural ponds is lethal to aquatic creatures and must be removed for water reuse. The efficiency of treatments for recirculating culture water is influenced by the physical properties of biofilter media. In this study, influence of hydraulic retention time (HRT) and packing rate of Hairbrush, Ring, TBR, Migring, Pall, Windball and Heilex in seven media types on solid and TAN removal efficiency in fresh water were examined. The HRT were set for 3, 5 and 10 minutes, and the packing rate were 50% and 100%. The highest removal efficiency occurred in Hairbrush media, next came ring type and TBR. However, the cost of Heilex type was most economical, the second was Hairbrush type. If took the cost and removal efficiency into consideration at same time, Hairbrush type was the best of all combinations, the second was Heilex type. The media with higher effective surface area provided higher removal efficiency in this study. To sum up, hairbrush type was proven as a suitable biofilter media and the operation conditions were adjusted according to quality of wastewater to meet it’s highest efficiency.