Assessing Green Methods for Pectin Extraction from Waste Orange Peels.

Area of Science:

• Food Science
• Green Chemistry
• Biomass Valorization

Background:

• Pectin, a valuable polysaccharide, is often extracted using energy-intensive methods.
• Food waste, such as orange peels, represents a significant source of recoverable pectin.
• Developing sustainable pectin extraction methods is crucial for circular economy principles.

Purpose of the Study:

• To compare three water-based pectin extraction techniques: hot-water, Rapid Solid Liquid Dynamic (RSLD), and microwave-assisted extraction.
• To evaluate these methods based on pectin yield, quality, and embodied energy.
• To identify the most environmentally friendly and efficient pectin production route from waste orange peels.

Main Methods:

• Extraction of pectin from waste orange peels using water as the solvent.
• Comparative analysis of hot-water, RSLD, and microwave-assisted extraction techniques.
• Evaluation of pectin yield, quality parameters, and embodied energy for each method.

Main Results:

• The acidic hot-water extraction method yielded high-quality pectin.
• Microwave-assisted extraction showed potential but required further optimization.
• Hot-water extraction demonstrated the lowest embodied energy, indicating superior sustainability.

Conclusions:

• Acidic hot-water extraction is the most sustainable method for producing pectin from waste orange peels.
• This research provides valuable insights for green pectin production and food waste valorization.
• The findings support the adoption of eco-friendly approaches in the food processing industry.