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KMID : 0366119740020020079
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Korean Journal of Applied Microbiology & Bioengineering
1974 Volume.2 No. 2 p.79 ~ p.82
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Studies on the Microbial Utilization of Agricultural Wastes (Part 3)
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Abstract
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Present experiments were designed to estimate the effects of pretreatments by various kinds of alkalis to the agricultural wastes such as cereal straws as the substrate on the production of cellulosic single-cell protein. Among the various kinds of alkalis NaOH was-proved to be the most effective on improving the digestibility of cellulose by the bacteria isolated. NH₄OH which is inferior to NaOH in the effectiveness of treatment might have more economic advantage in the price, and the ammonium salt resulted from the neutralization can be used as the nitrogen source by bacteria. The treatment with higher conceniration than 1 normality of NH₄OH didn´t increase the productivility of cell mass. About five per cent of (NH₄)₂SO₄ in medium resulted from the neutralization didn´t have any influence on the cell mass productibility. Futhermore, the cell mass productibility was higher in the case of neutralization than alkali free washing. The digestibility of straws was increased from 7.9% to 46.0% by NH₄OH treatment, and 6. 3∼6.45g of dry cell were obtained from 40g of NH₄OH treated straws. In the case of NaOH treatment, 8.6g of cell mass was obtained from 40g of substrate.
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