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題 名 | 龍鬚菜去除電廠廢水中NH[feb0]之可行性研究=A Study on the Feasibility of Using Gracilaria to Remove NH[feb0]from the Discharged Water of Power Plant |
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作 者 | 陳忠信; 顏靜雅; | 書刊名 | 台電工程月刊 |
卷 期 | 619 2000.03[民89.03] |
頁 次 | 頁80-93 |
分類號 | 445.2593 |
關鍵詞 | 龍鬚菜; 電廠廢水; 氨去除; Graciliaria tenuistipitata; Discharged water of power plant; Ammonia removal; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究的目的在探討利用大型海藻龍鬚菜( Gracilaria tenuistipitata )吸收 電廠廢水中 NH �w之效率,由龍鬚菜的光合作用、吸收作用及生長三方向著手探討。 在 25 ℃及添加 2 mM NaHCO �停囓韝U,測定龍鬚菜最大光合作用產氣率( Pmax )與光度 之關係。結果發現在光 300 μ mole m □ s □附近達到光合作用產氣率飽和,而產氣率值 隨光度再提升至較高的範圍( 600 ∼ 900 μ mole m □ s □)仍未明顯變動。 最大光合 作用產氣率隨培養液中 NH 濃度而改變,在 NH �w濃度低於 60 μ M 範圍,Pmax 大致保 持不變,超過 60 μ M 直到 100 μ M 則是呈現下降的趨勢。 實驗中探討龍鬚菜對主要無機營養( N、P )的吸收特性, 結果顯示龍鬚菜對於 N 的吸收 速率與 N 濃度間有最大值( NH �w的吸收)或飽和值( NO �v及 NO □的吸收)的關係出 現。 對於 NO �v及 NO □的吸收遠不如對 NH �w的吸收,在相同為 60 μ M 的濃度下,NO �v及 NO □的吸收皆在 10 μ M . gww □. h □以下而 NH �w的吸收可以達約 60 μ M . gww □. h □,對於 P 的吸收則與 P 濃度之增加呈現線性增加的關係,在試驗濃度範 圍內未出現飽和現象。 龍鬚菜之生長在 NH �w濃度為 60 μ M 下與光度呈現雙曲線的關係 , 在此關係中,在光度 100 μ mole m □ s □以下為限制相; 100 ∼ 200 μ mole m s 為過渡相, 200 ∼ 900 μ mole m □ s □間為直線緩和增加相。 在光照 600 μ mole m □ s □下,25ppt 與 33ppt 二種鹽度對龍鬚菜生長影響差異不顯著。 在光照 600nmole m s 下,NH 濃度與生長的關係是在 0 ∼ 40 μ M 呈現限制相,由 40 ∼ 60 μ M 間為緩和 增加相, 60 μ M 以上生長速率下降。龍鬚菜之生長在 N:P 比實驗範圍( 60:1、30:1 、15:1 及 75:1 )內沒有顯著差異。 在 NH 濃度為 60 μ M 及 lOO μ M 下,增加 CO �砥A濃度之曝氣可提升龍鬚菜生長速率。 在 100nMNH4 .下由 350ppm CO �砟岔n氣(一般 空氣)提升至 1250ppm CO �砥A 之曝氣正相關較明顯,提升 16% day □)在 60 μ MNH。 下較不明顯(僅提升至 14% day □)。電廠廢水中含有約 760 μ M 的 NH �w,6850 μ M 的 NO �v及 69.6 μ M 的 NO □,但不含磷酸。 經一系列稀釋後,再添加微量營養進龍鬚 菜生長試驗,結果發現稀釋 60 倍至 l40 倍者皆可獲大約 10%day □。 的生長速率,稀釋 倍數 60 以下則發現倍數越小者有使生長呈直線下降的的趨勢。 以電廠廢水 60 倍及 l00 倍稀釋水分別在 lOOOppm 及 1500ppm CO �紐n氣下培養龍鬚菜,結果發現 CO �砥A 曝氣濃 度提升可使生長速率加速。 且 1500ppmCO �砥A 組的生長速率( 15 ∼ 16%day □)大於 lOOOppm 組 (13 ∼ 14%day □)。 |
英文摘要 | The purpose of this project is to study the NH@ removing efficiency by macroalga, Gracilaria tenuistipitata, from the discharged waste-water of power plant in the aspects of photosynthesis, nutrient absorption and growth. The maximum photosynthetic 0 �� evolution in Gracilaria was determined with photon flux density (PFD) varying from 0~1000 μ mol m □ s □ with other factors set at constant (25 ℃, 2mM NaHCO �� ). It was found that photosynthetic rate was saturated at PFD of around 300 μ mol m □ s □ and a constant phase was maintained at PFD of higher range (600 ∼ 900 μ mol m □ s □ ). The Pmax values was found to be varied with the NH �w concentration in medium with a decreasing trend as NH �w concentration was raised over 60 μ M while at the lower range of NH �w it was nearly constant. The absorption of the 2 macronutrients, i.e. N and P, were studied. The absorption rate of Gracilaria in relation to N concentration appeared with an optimal value for NH �w uptake and saturated values for NO �v and NO □ uptake; with the same external concentration (e.g. 60 μ M), the NH �w absorption rate was as high as 60 n M gww □ h □ while the latter two were less than 10 a M gww □ h □. The absorption rate of P0@~ appeared as an linear increasing trend with the increase of external concentration. With 60 □ M of ambient NH �w concentration a hyperbolic curve of relationship appeared between tlie Gracilaria growth and its light environment. In the relationship, a limiting phase appeared with PAR below 100 μ mole m □ s □; a transient phase between 100 ∼ 200 μ mole m □ s □; and a slowly increasing phase with PAR further up to 900 μ mole m □ s □. It was also found that there was no significant difference in Gracilaria growth grown with 25ppt and 33ppt ofseawater under PAR of 600 μ mole m □ s □. For NH@ concentration effect on Gracilaria growth, the growth was limited at the lower concentration range (0 ∼ 40 μ M) which was followed by a slow increasing phase at range of up to 60 μ M NH �w, and then a declining phase for higher NH �w concentration. No significant growth difference was found with various combination of N: P, ranging from 60:1、30:1、 15:1 to 7.5: 1, in growth medium. Higher CO �� concentration in aeration would increase Gracilaria growth rate as compared with those in general air aeration. Growth with NH.,' concentration of 100 n M, the elevation of CO �� aeration from 350ppm (air) to 1250ppm exhibited more increasing effect than with NH �w concentration of 60 μ M. The discharged waste-water from Taichung power plant was found to contain approximately 760 μ M of NH �w, 6850 μ M of NO �v and 69.6 μ M of NO □ with PO �瓷� undetected. Serial dilution of the waste-water with seawater (25ppt) with addition of PES micronutrient was found to exhibit a sigmoid curve of relationship with Gracilaria growth. The growth rate was found to be around 10 %day □ with dilution rate of 60 to 140 times while the growth was reduced drastically as dilution rate was lowered down to 10. The growth was further enhanced with elevated CO �� concentration in aeration with 1500ppm treatment exhibiting higher growth rate (15 ∼ 16% day □ ) than 1000ppm treatment (13 ∼ 14% day □ ) in waste-water of both 60 and 100 times of dilution. |
本系統中英文摘要資訊取自各篇刊載內容。