• 作者： 陳學潛
• 作者服務機構： 國立臺灣大學植物學系
• 中文摘要： Studies on Oscillatoria limnetica indicatethat this microalgahase ment many of the require-ments of a food organism or single-cell protein(fast-growing, easy to culture, non-toxic, richin protein, highly digestible, etc.) and can beutilized as feed for fishes and mammals effec-tively. Although mass culture of microalgae isone way to conserve solar energy, and it holdspromises to provide new sources of protein, theproduction method exemplified by Chlorella(open agitation system) proves too costly. Lowyield and high costs of carbon sources and ofcell recovery are the main contributing factors.Algae have a growth rate slower than that ofbacteria and yeasts. In a batch culture system,they display a relatively short logarithmic phaseof growth; as soon as cell density reaches acertain point (generally not more than 2g/liter),self-shading and CO insufficiency become evident.Growth and yield are thus limited. The proposed"C0 , solar and geothermal energies-algae-fishsystem" entails use of a waste gas from thegeothermal power plant (CO ) to grow photo-synthetically intense cultures of suitable algae(eg. Oscillatoria, Lyngbya)，the algae are trans-fered to a separate pond for fish farming. Thisconcept eliminates the costly cell recovery processand also converts microbial protein to fish protein,which is fully acceptable to humans. Further-more, both algal pond and fish pond can beheated (particularly in winter time) by geo-thermal heat to accelerate growth as well as toextend the growing season.
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