초록

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Abstract ▼ AI-Helper

Comprehensive laboratory experiments including digestion failures were conducted to identify differences between mesophilic and thermophilic digestion. Critical HRT was found to be near 10days for mesophilic and near 5days for thermophilic digestion. Inhibition occurred rapidly when operated below c...

Comprehensive laboratory experiments including digestion failures were conducted to identify differences between mesophilic and thermophilic digestion. Critical HRT was found to be near 10days for mesophilic and near 5days for thermophilic digestion. Inhibition occurred rapidly when operated below critical HRT. However, inhibition at mesophilic condition was much greater than that at thermophilic condition. Although digester performances were similar above critical HRT of mesophilic digestion, thermophilic digestion was considerably advantageous below this HRT. Thermophilic digestion produced smaller amount of sludges which had significantly higher settling velocity and lower specific resistance. Reaction rates also clearly demonstrated temperature and HRT effects on digestion. It was also found that gas production rates increased linearly with increasing reaction rates regardless of temperature and their relationships were almost identical at mesophilic and thermophilic temperature.