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  • 學位論文

以模擬生活污水培養小球藻探討生長特性之研究

A study on the growth characteristics of microalgae cultivated in the synthesized domestic wastewater

指導教授 : 高思懷

摘要


台灣不斷積極實行全國污水下水道化,集中處理生活污水,減少污水排放至河川的總量。而一般污水處理系統中,提供適合環境及足夠營養源的生物淨化操作方式與培養微藻的方式相同,故改以培養微藻來處理生活污水,不僅處理污水也改善傳統處理程序污泥產生的問題,同時生產的藻體可製成生質能源、飼料等環保及經濟效益。 本研究以模擬生活污水作為培養小球藻(Chlorella sp.)之基質,以批式培養,培養環境固定於25℃,光照強度為90 μmol.m-2.s-1,光照週期為12 h light/12 h dark,通氣空氣流速固定為1 L.min-1,以探討Chlorella sp.培養於模擬生活污水的生長特性和生長因子,並以以活性污泥法控制指標-食微比的概念,來探討模擬生活污水與小球藻生物質量之比值(F/M = TOC / Biomass)範圍。 實驗結果顯示,利用尿素作為培養Chlorella sp.的唯一氮源時,培養期間的pH值較為穩定。而以固定pH 7.5相較其他pH 4、6更利於Chlorella sp.生長,且去除營養源效率較高。並且發現食微比 (F/M) = 0.05和4已達極限值,低於或高於此數質皆不適合Chlorella sp.持續生長,而較適合Chlorella sp.於模擬生活污水的F/M範圍為0.5~2。本研究規劃以去除營養源為主、藻體產量為輔,則以F/M=0.5為最佳,除碳、氮的效率分別為528.44 TOC mg/g-algae和64.98 NH4+-N mg /g-algae,若以藻體產量(比生長速率較高者)為主、去除率為輔,則以F/M=1為最佳,其比生長速率為1.52d-1,而除碳、氮的效率分別為398.0 TOC mg/g-algae和47.17 NH4+-N mg /g-algae。

並列摘要


Taiwan has been actively implementing the national sewage-based system, centralized sewage, reducing the amount of sewage discharged to rivers.It is the same way to cultivation of microalgae and sewage treatment system to provide a suitable environment and adequate nutrition source of biological purification mode of operation. It is replaced by cultivating microalgae to deal with sewage treatment, and it is not only improved the traditional sludge processing issue , producting algae can also made biofuel, feed and also other environmental and economical benefits. In this study, microalgae (Chlorella sp.) cultivated in synthesized domestic wastewater as the matrix,in a batch culture, culture environment is fixed at 25 ℃, light intensity was 90 μmol.m-2.s-1, photoperiod L:D=12:12 (h), ventilation air flow rate is fixed at 1 L.min-1. It is to explore Chlorella sp. cultivated in synthesized domestic wastewater growth characteristics and growth factors. And use the concept of controling activated sludge process ─ food:microorganism ratio(F/M) in order to explore the ratio of synthesized domestic wastewater and biomass of Chlorella sp. (F/M=TOC/ Biomass) range. The results showed that,the pH was relatively stable while using urea as the only nitrogen source to culture Chlorella sp.. Environment fix at pH 7.5 compared to pH 4 and pH 6 is good for the Chlorella sp. growth . And it is more efficient to removal nutrition. The F/M =0.05 and F/M= 4 are reached the limit,because lower or higher are not suitable for Chlorella sp.The F/M range of 0.5~2 cultivated in the synthesized domestic wastewater is more suitable.In this research, The main was to remove nutrition and the supplement by algae production. The best result was F/M=0.5,and the removal efficiency of carbon and nitrogen were 528.44 TOC mg / g-algae and 64.98 NH4-N mg/g-algae respectively, Algae production mainly supply by removing nutrition, the best result is F/M=1, the specific growth rate of 1.52d-1, and the removal efficiency of carbon and nitrogen is 398.0 TOC mg/g-algae and 47.17 NH4-N mg/g-algae respectively.

參考文獻


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被引用紀錄


吳欣慧(2016)。Chlorella sp.處理生活污水與藻菌共生克服酚毒害之研究〔博士論文,淡江大學〕。華藝線上圖書館。https://doi.org/10.6846%2fTKU.2016.00676

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