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題 名 | 循環式養鰻系統水環境管理與污濁固形物通量之關係 |
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作 者 | 侯文祥; | 書刊名 | 農業工程學報 |
卷 期 | 40:1 1994.03[民83.03] |
頁 次 | 頁55-63 |
分類號 | 438.661 |
關鍵詞 | 循環水養鰻; 污濁固形物; 通量測定法; 沈降物捕集器; 沈澱; 再懸浮; 分解; Recycled eel pond; Contaminated solid; Flux measurement; Sediment trap; Sedimentation; Resuspension; Decomposition; |
語 文 | 中文(Chinese) |
中文摘要 | 本文從固形物通量變動觀點探討水體環境管理,並提供一量測技術以決定循環式養鰻池中污濁固形物通量。實驗設計包含物質分佈測定法與通量測定法兩部分。前者主要乃從水質量平衡關係、流率、堆積物及SS濃度分佈調查等決定參考測點。並選定Toyo GS-25瀘紙及設計捕集器,從而選擇角落、給餌場、中央口三位置進行固形物通量測定實驗,以瞭解日夜間、給餌前後固形物生成變化。且調查單位生產用水量、單位面積生產量及餌料效率等,作為水循環處理設施管理的參考。實驗結果顯示:因池中流速過大(8~25cm/sec),SS不會集中於央央口且水面下30cm及70cm兩層的SS濃度水平分佈變動僅分別為4.9%及4.1%。一次選別換水期間的餌料效率高達91%,單位生產用水量為0.685□/kg及單位面積增重量達0.124kg/□日。 懸浮固形物和沈澱固形物存在量比約為1:12,由於池水流動影響,再懸起和沈澱交互作用頻繁,造成對捕集沈降固形物速度的測定擾動達12.5~40.8倍。在白天及夜間中,池內ss變動量除給餌後達±13%外,其餘時間並無明顯因沈澱而減少懸浮量的現象。由於每日循環12次的過度水流動,使得濃槽和濾槽的沈澱效率僅為0~6.7%/hr。固形物的分解速度僅為0.23%/hr,此池中固形物成分絕大多數(99.92%)為殘餌及糞等污濁物質。 |
英文摘要 | The relationship between the water environmental managements and contaminated solid fluxs is presented, and a measuring technique is also discussed for determining the contaminated solid flux in a recycled eel pond system. Experimental design included mass distribution and flux tests, the mass distribution test is applied based upon the relations among water mass balance, flow rate, sediments and suspended solid (ss) concentrations to locate the reference points for measurement. As a result, 3 measuring points of corner, center & feeding place in a eel pond are selected. A toyo GS-25 glass filter is chosen for filtration and de signed sedimentation traps. The flux test then is used to investigate the difference between day/night & before/after of feeding at 3 reference points with inlet-outlet within2-day testing interval. The efficiencies of water consumption, weight increasing, and feeding are also investigated. The experimental results show that SS can not be concentrated by flow rate in eel pond because of the high velocity(8~25cm/sec) at the two levels under 30cm and 70cm from the water surface. The efficiencies of feeding, water consumption, and weight increasing during water exchange are 91%, 0.69□□&0.125□□. Compartmental ratio of SS and sedimented solid is 1:1.2. Due to pond water movements, a frequent interaction between resuspension & sedimentation is occurred. As a result, the difference of total SS compartment is system before and after 3hrs of the feeding is ±3%, the another, it’s just ±5% and ±3% in daytime and nighttime. Due to a over-recycle rate (12 recycles/day), the maximum sedimentation efficiency of sedimentation and filtration ponds is low(6.7%/hr per total SS). The decomposition rate of solids is only 0.23%/hr. The components of solids are almost (99.92%) feeding residues & feces. |
本系統中英文摘要資訊取自各篇刊載內容。