반응표면분석을 이용한 패류의 부영양수 유기물 제어능 연구

Abstract

부영양화 호소수에 대한 국내 서식 펄조개( A. woodi- ana) 의 유기물 제어 실험 결과 , 펄조개 30 개체를 대상으로 패각 크기 4.3~15.5cm( 평균 9.54cm) 에 따른 유기물 여과율은 0.08~0.86 L g - 1 h - 1 , 단위 건중량당 펄조개의 여과율은 0.09 L g - 1 h - 1 를 나타내었다 . 펄조개의배설물 생산량 (PF) 은 0.00~11.10 mg g - 1 h - 1 , 단위 건중량당 배설물 생산량은 0.37mg g - 1 h - 1 를 나타내었다 . 또한 , 클로로필 -a 와 부유물질 제거율 (RA, %) 은 느린 유속에서 82.1%, 71.0% 빠른 유속에서는 65.4%, 57.5% 의제거율을 나타냈고 , 반응표면분석 결과 , 패각 크기는14.3~15.6 cm, 유속은 22~30 Lh - 1 구간에서 여과율6.21 L mussel - 1 d - 1 의 최적값을 나타내었다 . 또한 , 배설물 생산능은 패각 크기는 14.3~16.3 cm, 유속은 36~ 44Lh - 1 구간에서 배설물 생산이 4.2mg g - 1 d - 1 의 최적값을 나타내었다.

This study was conducted to establish models of filtrating rate and production of feces of a nativefreshwater bivalve, Anodonta woodiana, on removal organic matters in eutrophic waters. Among the appliedshell size (4.3~15.5 cm), the filtrating rate and production of feces of Anodonta woodiana was 0.08~0.86 Lg-1 h-1 (average 0.24 L g-1 h-1), 0.00~11.10 mg g-1 h-1 (average 0.94 mg g-1 h-1), respectively. In two differentwater current (high 48 Lh-1, low 24 Lh-1), the filtrating rate of Chl-a was 0.02~0.10 L g-1 d-1 (average0.05 L g-1 d-1), 0.02~0.11 L g-1 d-1 (average 0.07 L g-1 d-1) and the removal rate was 65.4%, 82.1%, respectively. Response surface methodology, with a central composite design comprising 3 levels and 2 variables,was used to identify the optimal removal condition of shell length, water current and filtrating rate or fecesproduction by bivalves. The optimum removal conditions were found that had optimized 6.21 L mussel-1 d-1at shell length 14.3~15.6 and water current 22~30 Lh-1. The optimal conditions of production of feces (4.2mg g-1 d-1) by freshwater mussels were shell length 14.3~16.3 cm and water current 36~44 Lh-1.