Peranan Keong Bakau, Telescopium Telescopium L., Sebagai Biofilter Dalam Pengelolaan Limbah Budidaya Tambak Udang Intensif

Abstract

The objective the experiment is to know the role of bakau snail, Telescopium telescopium L., as biofilter for improving waste water quality in shrimp culture. The experiment was carried out at laboratory scale. The parameters that observed in this experiment are physical, chemical and biological of waste water. Growth and survival rate of snail were also observed. Waste water quality measurement was carried out during a week, while the growth and survival rate were measured during two months. The aquarium of 30x40x40 cm were filled with 30 l of waste water from intensive shrimp culture. Bakau snail were stocked to the aquarium with density of 0 (control), 6, 9 and 12 snail/aquarium, and these treatment were replicated 3 times. The result shown that total organic matter (TOM), total ammonia, dissolved oxygen (DO) of waste water, and growth and survival rate of snail were not different between treatment of stocking density, while the biological oxygen demand (BOD), total suspended solid (TSS), nitrite and nitrate were significantly different (p<0,05). Bakau snail can be used as biofilter, expecially for decreasing the suspended material and bacteria population in waste water from intensive shrimp culture.