Biofloc Technology – A sensible Guide Book

Biofloc Technology19World AquAcultureReprinted from World cultivation 34(4):19-21. ©2003 World cultivation SocietyControl of microbic activityin aquaculture systems: active suspension pondsYoram avnimelech1 The management of aquaculture systems through the manipulation of microbial activity became associate necessary and com-monly mentioned technology arising from the event of intensive aquaculture. cultivation depended, historically, on protoctist activity. Growing sh, together with crustaceans or alternative genteel aquatic animals in water bodies depends, in tra-ditional cultivation, on alga generating the bottom for the organic phenomenon or food cycle, to feed the sh. Basic properties associated with alga management are listed in Table one. protoctist productivity in non-fed ponds depends on the level of inorganic nutrients, largely phosphorus (P) and atomic number 7 (N). Thus, one of the rst stages of intensication was to add inorganic fertilizers to the pool. Following the elimination of nutri-ents las a limiting issue, as is common in well impregnated or fed ponds, productivity becomes restricted by radiation reach-ing the alga. With optimum star radiatio

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microalgae and zooplankton) and organic particles (e.g. feces and feed) to create bioflocs (Avnimelech, 2009;Hargreaves, 2006). These aggregates act as an extra food supply with a high nutritionary content for shrimp (Avnimelech, 2007(Avnimelech, , 2009Krummenauer, Cavalli, Ballester, & Wasielesky Jnr., 2010;Schryver, Crab, Defoirdt, Boon, & Verstraete, 2008), and therefore the incorporation of atomic number 7 from bioflocs will reach as high as twenty ninth (Burford, Thompson, Mcintosh, Bauman, & Pearson, 2004). …
… feces and feed) to create bioflocs (Avnimelech, 2009;Hargreaves, 2006). These aggregates act as an extra food supply with a high nutritionary content for shrimp (Avnimelech, 2007(Avnimelech, , 2009Krummenauer, Cavalli, Ballester, & Wasielesky Jnr., 2010;Schryver, Crab, Defoirdt, Boon, & Verstraete, 2008), and therefore the incorporation of atomic number 7 from bioflocs will reach as high as twenty ninth (Burford, Thompson, Mcintosh, Bauman, & Pearson, 2004). …
… All tanks were supplied with constant aeration (radial blower of one HP), and air was subtle through small perforated tubes to keep up the bioflocs in suspension. Organic fertilizations with wheat bran, liquid sugarcane syrup and therefore the shrimp pelleted feed were conducted within the matrix tank to keep up the carbohydrate-to-nitrogen magnitude relation at 10:1, as delineate by Ebeling, Timmons, and Bisogni (2006) and Avnimelech (2009). …

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