조진우 안규홍 최재우 부경민 송경근 2024-01-12T18:02:55Z 2024-01-12T18:02:55Z 2008-01-01 https://pubs.kist.re.kr/handle/201004/93202 MEMBRANE COUPLED ACTIVATED SLUDGE METHOD AND APPARATUS OPERATING ANOXIC/ANAEROBIC PROCESS ALTERNATELY FOR PEMOVAL OF NITROGEN AND PHOSPHOROUS Patent 2008-01-01 2005-11-14 7,314,563 11/273,053 US 특허 한국과학기술연구원