小球藻之培養與薄膜濃縮研究

The Studies on the Incubation and Membrane Thickening of Chlorella

王郁萱(Y. H. Wang) ； 吳宛霖(W. L. Wu) ； 烏春梅(C.M. Wu) ； 朱敬平(C. P. Chu) ； 鍾裕仁(Y. J. Chung) ； 廖健森(C.S. Liao)

《中華生質能源學會會誌》 32卷3&4期 (2013/12) Pp. 65-71

摘要

各種再生能源中，生質能源的開發與利用近年來受到高度的重視。藻類單位面積生產量與光合作用效率均高於維管束植物，並富含油脂，收成後可以熱化學或生物化學方式轉製為生質能源，包括液態燃料或碳化物，被視為「第三代生質能作物」。本研究探討以人工配製不同氮源液與真實廢水培養小球藻，結果顯示不同氮源可獲取最佳藻細胞濃度的培養時間不同，以硝酸鹽氮作為氮源，可於14天培養週期下，獲取最佳的培養效能，是為理想氮源。進一步以可反洗之中空絲膜濃縮小球藻，結果顯示過濾通量操作於0.02 m^3/m^2/hr的條件下，最佳過濾週期為30分鐘，再進行反洗作業，配合薄膜可降低藻類後續離心濃縮所需能耗，提高藻類生質能效益。

關鍵字

微藻 ； 小球藻 ； 微過濾膜

並列摘要

Among the renewable energy resources, development and utilization of bioenergy has been highly emphasized in recent decades. Microalgae are one the most feasible candidates, or the ＂third-generation biomass＂, due to its high yield and high grease content. After harvest, it can be converted to bioenergy using the chemical or biochemical processes, including the solid and liquid fuels. In this study we incubated the Chlorella using synthetic wastewater and the real wastewater, containing a variety of nitrogen sources. It showed that for different nitrogen sources, the optimal mean cell retention time to reach the highest biomass concentration in the reactor was different. NO_3-N has been identified as the best nitrogen source for Chlorella. A further trial using backwashable hollow fiber membrane to thicken the Chlorella was successful. The membrane could be stably operated at the flux 0.02 m^3/m^2/hr with the optimal filter cycle. The membrane thickening can lower down the required energy in the subsequent centrifugation.

並列關鍵字

Microalgae ； Chlorella vulgaris Beij. ； microfiltration membrane