반응표면분석을 이용한 패류의 부영양수 유기물 제어능 연구

초록

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.

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