Migration and transformation of main components during perishable waste bio-drying process.

Area of Science:

• Environmental Science
• Microbiology
• Waste Management

Background:

• Bio-drying is a promising technology for reducing the moisture content of perishable waste.
• Understanding the factors, microorganisms, and component transformations is crucial for process optimization.
• Controlling secondary pollutants is essential for sustainable waste management.

Purpose of the Study:

• To investigate the key factors influencing bio-drying of perishable waste.
• To identify the dominant microorganisms involved in the bio-drying process.
• To analyze the transformation of main components (carbon, nitrogen, sulfur, phosphorus) during bio-drying.

Main Methods:

• Experimental investigation of bio-drying process parameters.
• Microbial community analysis to identify dominant species.
• Quantification of component transformation into gas, leachate, and solid residues.

Main Results:

• Optimal conditions include initial temperature >20°C, intermittent ventilation, and microbial inoculation.
• Key microorganisms identified: Alcaligenes, Aquamicrobium, and Brevundimonas.
• Significant transformation of organic matter into gas-phase products (ammonia, VOCs) and leachate was observed, with specific quantities detailed for C, N, S, and P components.

Conclusions:

• Bio-drying is effective in reducing waste moisture and transforming organic components.
• Temperature and microbial biomass are critical factors for efficient bio-drying.
• The study highlights the need for secondary pollutant control and provides a basis for process improvement.