EFFECT OF COMPLEMENTARY CENTRIFUGATION ON CHEMICAL AND RHEOLOGICAL COMPOSITION FROM STICKWATER

The effect of the complementary centrifugation on the chemical and partial rheological composition, as well as the biodegradability of Monterey sardine and crinude sardine stickwater as alternative in the recovery of solids was evaluated. Was used stickwater and centrifuged to subsequently apply the respective analyzes. Complementary centrifugation significantly reduces the concentration of total solids, viscosity, biochemical oxygen demand (BOD5) and chemical oxygen demand (COD), by almost 50%. The stickwater collagen concentration (11.7 mg/g and 3 mg/g) was higher than the concentrations in centrifuged stickwater (3.3 and 0.87 mg/g), also the viscosity was related to the collagen/gelatin concentration, which helps calculate biodegradability. This was calculated to be greater than 2.5 but less than 5. It is concluded that the complementary centrifugation as a unit operation increases the recovery of solids and improves the treatment of stickwater.