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結論與建議

5-1 結論

依上述章節說明,本研究之重要發現如下說明:

1. 以 OD683 之變化與藻體乾重呈現相近之趨勢。當氣體流量越大時,

生 物 質 量 產 生 愈 高 ; 在 固 定 空 氣 流 量 下 , 添 加 少 量 爐 石 不 利

Chlorella sp.之生長,但高爐石量較低爐石量益於 Chlorella sp.之生

長。

2. 不同空氣流量下,Chlorella sp.藻體表面上之官能基以羥基、胜肽 鍵、羧酸和多醣體為主,高空氣流量下,OH 基和 CH2基之穿透率 較差,羧酸和多醣體官能基穿透率較佳;在固定空氣流量下,高爐 石量在 OH 基穿透率較差,在羧酸和多醣體官能基穿透率較佳。

3. Chlorella sp.藻體表面電荷,不同空氣流量下進行培養時,介於-15 到-18 mV 之間,添加爐石後有往正電性移動的趨勢,此與爐石釋 出金屬離子與藻體表面官能基相互結合相關。藻體的自發性螢光強 度,大部分添加爐石之試程較未添加爐石者為高。

4. 在 Chlorella sp.藻體部分,從 EEFM 圖中顯示似蛋白質(protein-like) 和色素(pigment)兩類物質波峰,隨空氣流量增加,兩類物質之螢光 強度也隨之減少;在固定空氣流量下,添加爐石後螢光強度增強,

而爐石量增加時,螢光強度則是隨著爐石量增加而降低。五類有機 物質平均螢光強度,第 I 及 II 類有機物的比例,第 0 到 2 天會減少,

第 2 到 11 天則隨天數增加而增加,第 III 類有機物的比例則是隨時 間增加而減少,第 IV 類有機物所佔比例,第 0 到 2 天會增加,第 2 到 11 天則是隨天數增加而減少。

5. 藻類釋出之有機物特性,從 EEFM 圖中顯示似蛋白質(protein-like) 和似腐植質(huimc-like)物質存在,添加爐石後螢光強度會較無添加 爐石的增強,而爐石量增加時,螢光強度並不會隨之改變。五類有 機物質平均螢光強度,不同空氣流量培養下隨著培養天數增加第 III 及 V 類有機物的比例增加,第 VI 類有機物的比例則是隨時間增加

而減少,相同空氣流量下,不同爐石添加量第 I 及 II 類有機物所佔 比例依天數增加而減少,第 III 及 V 類則是先減少後增加,IV 類是 呈現減少趨勢。

6. Chlorella sp.之固碳效率隨空氣流量越小,其值增加,但在固定流 量下,添加爐石之試程固碳效率均低於未添加爐石者,但高爐石 量試程之固碳率仍高於低爐石量者。

5-2 建議

1. 本研究由於時間及設備限制,僅以空氣中二氧化碳濃度計算固碳 率,未來可考慮以不同濃度二氧化碳進行 Chlorella sp.培養,觀察 不同二氧化碳濃度對 Chlorella sp.物化性質及水相中有機物性質 影響,並探討固碳效能之變化。

2. 實驗期間未能在培養過程中針對爐石釋出金屬離子進行測定,瞭 解高低爐石量對 Chlorella sp.培養生長之影響,進而何種金屬離子 對於藻類成長抑制及提昇,未來可朝此方向再進行測試。

3. 瞭解 Chlorella sp.的物化性質,評估該類藻體之生質體在保養品開 發及運用。

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