Study on Elimination Techniques of Trace Contaminants for CELSS

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The paper have discussions on the effective elimination techniques of trace contaminants for CELSS. The elimination of the trace contaminants produced inevitably from activities of plants and animals including a human being, and causing physiological symptoms is a matter of importance in order to sustain safe and comfortable controlled ecological environments. The result of s tudy on utilized elimination methods for the trace contaminants concludes that an application of catalyst filters with low pressure drop property to CELSS is a promissing elemental method. Experiments on manufactured catalyst and activated carbon filters with a sectional honeycomb structure were carried out regarding specific surface area, benzene adsorption capacity, pressure drop, mechanical strength and an elimination performance for typical trace contaminants, such as, hydrogen sulfide, methyl mercaptan, ammonia, and trimethyl amine. Results of the experiments showed following conclusions. (1) The sectional honeycomb structure was effective on a reduction in operational energy consumption, and a securement of wide surface area and required mechanical strength. (2) Catalytst ingredients of the filter made a contribution toward higher elimination performance for the contaminants than an activated carbon, in spite of its less physical adsorption capacity. The conclusions revealed the effect of the catalyst filters on an overall improvement of CELSS.
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