Biofloc Reduces Feed, Filtration Costs In Recirculating Shrimp Nursery System

摘要

Trials with recirculating shrimp nursery systems in India sup-ported the use of biofloc, which removes nitrogenous waste in the water and provides food for the shrimp. The use of biofloc to control ammonia is a way to reduce the size - and cost - of the filtration system. Biofloc also reduced costs for standard starter feed up to 50% without compromising the growth, health and survival of the animals. Increasing biosecurity risks, adverse weather conditions and the need to maxi-mize farm output are some of the major reasons for the use of closed, water-recirculating systems for shrimp nurseries. Typically, such nurseries consist of grow-out raceways or circular tanks connected to a recirculating filtration system enclosed in an indoor facility. Thefiltration systems usually incorporate raw water treatment and storage, and a small effluent treatment plant.