Optimization of Crude Inulin Extraction from Garlic (Allium sativum L.) Agro-industrial Waste using the Response Surface Methodology.

Abstract

Inulin is a polysaccharide with several applications within the chemical, pharmaceutical, and food industry. It is considered a dietary fibre that provides multiple health benefits. In this work, the yield of raw inulin obtained from garlic agro-industrial useless waste was maximized, by applying the response surface methodology in a central composite design (CCD), in which different distilled-water (DW)-to-garlic-agro-industrial-waste (GAIW) ratios (3 and 5 mL/g) and different temperatures (60 and 80 °C) were evaluated. Optimal condition was obtained with a DW/GAIW ratio of 4.3 mL/g and a temperature of 80.2 °C. Under this condition, the quadratic model showed a maximum yield of crude inulin of 8.17 ± 0.89 g/100 g. Further, the CCD model obtained was validated with three additional experiments at the same optimal condition. The FTIR spectra of inulin obtained from garlic agro-industrial residues and chicory inulin showed similarities and differences, presumably related to the different degrees of polymerization of the fructans present.

Study of Inulin Content and Extractions Methods in Several Types of Tubers: Review Paper

“…The extract is resistant to gastrointestinal conditions and is therefore considered prebiotic [61]. Meanwhile, the extraction process of inulin from agro-industrial organic garlic (Allium sativum) wastes optimized using the Response surface method is 8% [62].…”

Functional Oligosaccharides Derived from Fruit-and-Vegetable By-Products and Wastes

“…Apart from artichoke, other FVSW sources were also studied for inulin extraction [61,65]. Water extraction of garlic manufacturing waste at 80 • C gave a yield of 8 g/100 g waste [61].…”

“…Apart from artichoke, other FVSW sources were also studied for inulin extraction [61,65]. Water extraction of garlic manufacturing waste at 80 • C gave a yield of 8 g/100 g waste [61]. In a recent study, Lopes et al [65] simultaneously extracted inulin and fructooligosaccharides (FOS) from the stem of Stevia rebaudiana Bertoni using hot water extraction (80 • C reflux for 4 h).…”