The effects of using shell filters in the process of depuration for the survival of Anadara sp.

Anadara sp. is one of the shellfish that has a source of animal protein is high and has a high economic value. However, to obtain a safe source of food, the products must meet the standard by the government, one of which is the limitations in heavy metals in the shells. In the standard of sanitation of shellfish is required to do the depuration process to remove the contaminants be it bacteria or heavy metals. In this study, randomized design with 5 treatments was used: P0 (control / without filter), P1 (25 % filter with shells), P2 (50 % filter with shells), P3 (75 % filter with shells), P4 (100 % filter with shells). Each treatment was replicated 4 times. The results showed that filtering of shell in depuration process could cause the highest shell death for 24 hours occurred in P4 of 24.39 % and the highest death during 48 hours also happened at the treatment of P4 which was equal to 61.71 %. During the research, water quality measurement was measured at 29-30 °C, pH 7.2-7.7, dissolved oxygen (DO) 4-4.4 mg/L and salinity 28-30 ppt.