<p>Increasing rates of lifestyle diseases like cardiovascular diseases, type-2 diabetes, gut issues, and certain cancers have molded consumer preferences towards high dietary fiber (DF) diets. DF provides numerous health benefits, such as improved digestion, regulated blood sugar levels, and reduced risk of chronic diseases. Conventional DF extraction from plants involves wet fractionation, using solvents, acids, and alkalis, followed by extensive drying. This process consumes substantial water and generates wastewater with high biochemical oxygen demand, thereby raising environmental concerns. The review explores sustainable dry fractionation alternatives like air classification (AC) and tribo-electrostatic separation (TES) that offer solvent-free solutions, preserving the native structures of compounds. AC uses airflow to separate particles by size and density, while TES uses tribo-electric charging to separate components on the basis of acquired charge. Optimal milling is crucial as a preliminary step to grind components, ensuring DF is removed as distinct particles, preferably as a coarse fraction, without adhering protein or starch. Both techniques show promise for DF enrichment from plant sources, aiding in the creation of functional foods with health benefits. In comparison to AC, TES is a newer technique that can be used independently or in combination with AC to produce DF-rich fractions with high purity. For successful TES separation, optimal contact between particles and the charging material is critical. This factor governs the charge buildup on the particles, ultimately affecting their attraction or rejection by the electrodes. Future research needs to focus on optimizing these techniques for DF enrichment, expanding their applications.</p>

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Advances in Dry Fractionation Techniques for Fiber Enrichment

  • Manju Bala,
  • Seerat Bhinder,
  • Shivani,
  • Deepika Goswami,
  • Surya Tushir,
  • Rajesh Kumar Vishwakarma,
  • Nachiket Kotwaliwale

摘要

Increasing rates of lifestyle diseases like cardiovascular diseases, type-2 diabetes, gut issues, and certain cancers have molded consumer preferences towards high dietary fiber (DF) diets. DF provides numerous health benefits, such as improved digestion, regulated blood sugar levels, and reduced risk of chronic diseases. Conventional DF extraction from plants involves wet fractionation, using solvents, acids, and alkalis, followed by extensive drying. This process consumes substantial water and generates wastewater with high biochemical oxygen demand, thereby raising environmental concerns. The review explores sustainable dry fractionation alternatives like air classification (AC) and tribo-electrostatic separation (TES) that offer solvent-free solutions, preserving the native structures of compounds. AC uses airflow to separate particles by size and density, while TES uses tribo-electric charging to separate components on the basis of acquired charge. Optimal milling is crucial as a preliminary step to grind components, ensuring DF is removed as distinct particles, preferably as a coarse fraction, without adhering protein or starch. Both techniques show promise for DF enrichment from plant sources, aiding in the creation of functional foods with health benefits. In comparison to AC, TES is a newer technique that can be used independently or in combination with AC to produce DF-rich fractions with high purity. For successful TES separation, optimal contact between particles and the charging material is critical. This factor governs the charge buildup on the particles, ultimately affecting their attraction or rejection by the electrodes. Future research needs to focus on optimizing these techniques for DF enrichment, expanding their applications.