Fermentation of Musa paradisiaca Peels to Produce Citric Acid

摘要: Among organic acids, citric acid (CA) features the highest production volume and greatest economic potential. The steadily increasing demand for CA necessitates improvement diversification of corresponding techniques via incorporation more environmentally friendly less costly processes such as bioconversion agroindustrial by-products. Musa paradisiaca, known plantain, is a food product global importance; however, related by-products are scarcely utilized. Herein, we investigate from M. paradisiaca peels fermentation with Aspergillus niger. Compositional analysis shows that above contain 623 g·kg−1 total carbohydrates, 374 g·kg−1 starch, 91 g·kg−1 protein therefore rather rich in carbon, other elements contained substantial amounts to K (28 g·kg−1), N (10 g·kg−1), Fe (39 mg·kg−1), Na (71 mg·kg−1), Zn (16 mg·kg−1), Cu (18 mg·kg−1). Evaluation solid-substrate conditions (pH inoculum loading) reveals maximized (29 g·kg−1) at 10% consistency, 30°C, pH 1.4, loading = 20 mg, demonstrating most important parameter determining efficiency. As result, concluded be suitable substrate biosynthesis A. niger under optimal nutritional conditions.