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Title Application of a Fuzzy Control Method to a High-load Biological Denitrification Process in the Night Soil Treatment Plant
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Key Words "activated sludge process, fuzzy inference, ammonium nitrogen, oxidized nitrogen, denitrification, night soil"
³µÍ× Ã±°ìÁå¤òÍѤ¤¤Æû¥µ¥¤¥¯¥ë¤ÎÌä·çÇøµ¤¤ò¹Ô¤¦À¸Êª³ØŪ¾Ë²½Ã¦ÃâÁÇ¥×¥í¥»¥¹¤Ë¤ª¤¤¤Æ¡¢¶õµ¤Î̤òÀ©¸æ¤¹¤ëÊýË¡¤È¤·¤Æ¼¡¤ÎÆó¤Ä¤ÎÊýË¡¤Ë¤Ä¤¤¤ÆÈæ³Ó¼Â¸³¤ò¹Ô¤Ã¤¿¡£­¡´Ö·çÇøµ¤¤Î»þ´ÖÇÛʬ¤ò°ìÄê¤È¤·¤Æñ°Ì»þ´ÖÆâ¤ÎÇøµ¤¶õµ¤Î̤ò¥³¥ó¥È¥í¡¼¥ë¤¹¤ëÊýË¡¡£¡ÊÇøµ¤ÎÌÀ©¸æ¡Ë­¢Ã±°Ì»þ´ÖÆâ¤ÎÇøµ¤¶õµ¤Î̤ò°ìÁö¤Ë¤·¤Æ¾Ë²½¤ª¤è¤ÔæÃâÁǤλþ´Ö¤òÁý¸º¤¹¤ëÊýË¡¡£¡ÊÇøµ¤»þ´ÖÀ©¸æ¡Ë¼Â¸³¤Î·ë²Ì¡¢Ã»¥µ¥¤¥¯¥ë´Ö·çÇøµ¤±¿Å¾¤ò¹Ô¤¦¾Ë²½Ã¦ÃâÁǽèÍý¤Ç¤Ï¡¢Çøµ¤ÎÌÀ©¸æ¤è¤êÇøµ¤»þ´ÖÀ©¸æ¤ÎÊý¤¬È¿±þÀ©¸æ¤Î±þÅúÀ­¤ò¹â¤á¤é¤ì¤ë¤È¹Í¤¨¤é¤ì¤¿¡£Èæ³Ó¼Â¸³¤Î·ë²Ì¤òÈ¿±Ç¤·¤Æ¡¢Çøµ¤»þ´Ö¤Î¥Õ¥¡¥¸¥¤À©¸æ¥ë¡¼¥ë¤òºîÀ®¤·¡¢¼ÂºÝ¤Î¤·Ç¢½èÍý»ÜÀߤˤª¤¤¤Æ¾Ë²½Ã¦ÃâÁDZ¿Å¾¤ò¹Ô¤Ã¤¿¡£·ë²Ì¤Ï°Ê²¼¤Î¤È¤ª¤ê¤Ç¤¢¤ë¡£¡Ê£±¡Ë½èÍýÎ̤òÄê¾ïÉé²Ù¤Î120%¤È¤·¤Æ±¿Å¾¤ò¹Ô¤¤¡¢¹¹¤Ë°ìµ¤¤ËÄê¾ïÉé²Ù¤Î80%¤Ë¸º¾¯¤·¤¿¾ì¹ç¤Ë¤ª¤¤¤Æ¤â¥Õ¥¡¥¸¥¤¿äÏÀ¤Ë¤è¤Ã¤ÆÇøµ¤»þ´Ö¤¬¥³¥ó¥È¥í¡¼¥ë¤µ¤ì¡¢°ÂÄꤷ¤¿¾Ë²½Ã¦ÃâÁǽèÍý¤¬·Ñ³¤Ç¤­¤¿¡£¡Ê£²¡Ëû¼þ´ü¤ÇÇøµ¤»þ´Ö¤ÎÈùÄ´À°¤ò¹Ô¤¦¥Õ¥¡¥¸¥¤À©¸æ±¿Å¾¤Ë¤è¤Ã¤Æ¡¢Ã»¥µ¥¤¥¯¥ë¤Î´Ö·çÇøµ¤Ã¦ÃâÁDZ¿Å¾¤¬Ä¹´ü´Ö°ÂÄêŪ¤Ë±¿Å¾½ÐÍè¤ë¤³¤È¤¬³Îǧ¤Ç¤­¤¿¡£
Abstract "The single basin biological denitrification system with intermittent aeration is an excellent system, which consists of simple components and has flexibility in operation. Ammonium nitrogen (NH4-N) and oxidized nitrogen (Nox-N=NO2-N+NO3-N) were monitored in an intermittently aerated denitrification reactor of by using NH4-N and Nox-N automated analyzers, each combined with an ultra-filtration sampler for pretreatment. The monitored result suggested that the aeration-time control method was better than the air-volume control method in nitrification. Then the authors tried to apply fuzzy inference by using mainly the aeration time control method. The fuzzy control system infered suitable conditions from multi-variables (DO, ORP and pH) obtained in the actual process. The fuzzy control system was steadily performed with a quick response and high nitrogen removal under easy maintenance."
 
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