For the Sample 1 in which the heat treatment time was 30 minutes, some nitrite type nitrification reaction occurred, but {TAIL ~ the production} of {HEAD ~ the nitrite type nitrification carrier} was not complete since nitric nitrogen concentration in the treated water after the nitrification treatment was 10 to 25mg/L 
For the Sample 1 in which the heat treatment time was 30 minutes , some nitrite type nitrification reaction occurred , but { TAIL ~ the production } of { HEAD ~ the nitrite type nitrification carrier } was not complete since nitric nitrogen concentration in the treated water after the nitrification treatment was 10 to 25mg / L
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