| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably perform the treatment of night soil. SOLUTION: A night soil treatment reaction tank 4 equipped with an air diffuser 13 introducing air 12 into night soil 11 from the outside so as to nitrate ammonia in night soil to perform denitrification and an operation means 15 measuring respective data of ammonia nitrogen, pH, ORP and BO in the night soil treatment reaction tank 14 to operation these measured data are provided and, when the blow-in amt. of air 12 into the night soil treatment reaction tank 14 is subjected to fuzzy control by using at least ammonia nitrogen as a reference value, the average value of past data is used as the reference value of ammonia nitrogen to be processed by the operation means 15 and fuzzy control is performed to control the air blow-in amt. of the air diffuser.</p> |
