초록

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Abstract ▼ AI-Helper

In the composting process, bacteria. actinomycetes and fungi appear at the different stage. Bacteria become dominant at the early stage. When the temperature increases above 50℃. only thermophillic Bacillus can survive. Besides thermophillic Bacillus, Closteridium, Alcaligenes, Flavobacterium, Pseud...

In the composting process, bacteria. actinomycetes and fungi appear at the different stage. Bacteria become dominant at the early stage. When the temperature increases above 50℃. only thermophillic Bacillus can survive. Besides thermophillic Bacillus, Closteridium, Alcaligenes, Flavobacterium, Pseudomonas, Eschrichia, Serratia were reported to be present. Actinomycetes become dominant when the temperature in the compost pile drops below 50℃ .Sixteen species of actinomycetes were reported including Strepmyces. Fungi become dominant at the last stage when the temperature drops below 40℃. Thirty three species of fungi were reported including Alcaligenes. Bacteria decompose easily available carbohydrates. Decomposition-resistant substrate such as lignocellulose is degraded by actinomycetes and fungi. Lignin is almost not decomposed during the composting process. Over all percentage of protein in the compost tends to stay constant since the decomposition and production is in equilibrium. The optimum decomposition temperature is 55~59℃. When the temperature increases above 60℃, microbial activity is inhibited. Minimum interstitial oxygen concentration is known to be 5%. When the oxygen concentration is increased above 18%. decomposition rate increases. For a well colonized compost pile. minimum moisture content for composting is 22%. The moisture generation by microbial metabolism is insignificant. The success of composting process is largely dependent upon the efficient management of microbial ecosystem.

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