Minerals consumption by Acetobacter xylinum on cultivation medium on coconut water

The objective of this work is to verifying the consume of the minerals K, Na, Fe, Mg, P, S-SO(4)(−2), B, N Total Kjedahl (NTK), NO(3)(−)-N, and NH(4)(+)-N in the production of bacterial cellulose by Acetobacter xylinum, according to the medium and the manner of cultivation. The fermentative process was in ripe and green coconut water. K and Na were determined by flame emission photometry, Mg and Fe by atomic absorption spectrophotometry, P by molecular absorption spectrophotometry, S-SO(4)(−2) by barium sulphate turbidimetry, B by Azomethin-H method, NTK by Kjeldahl method, N-NO(3)(−) and N-NH(4)(+) by vapor distillation with magnesium oxide and Devarda’s alloy, respectively. In Fermentation of ripe coconut water there were higher consumption of K (69%), Fe (84,3%), P (97,4%), S-SO(2)(−2) (64,9%), B (56,1%), N-NO(3)(−) (94,7%) and N-NH(4)(+) (95,2%), whereas coconut water of green fruit the most consumed ions were Na (94,5%), Mg (67,7%) and NTK (56,6%). The cultivation under agitation showed higher mineral consumption. The higher bacterial cellulose production, 6 g.L(−1), was verified in the coconut water fermentative in ripe fruit, added KH(2)PO(4,) FeSO(4) and NaH(2)PO(4) kept under agitation.