Regulating method of microbial driving the phosphorus bioavailability in factory composting

Area of Science:

• Environmental Science
• Microbiology
• Soil Science

Background:

• Phosphorus bioavailability is crucial for compost quality assessment.
• Limited understanding of microbial and environmental impacts on potentially active phosphorus in factory compost.

Purpose of the Study:

• Investigate microbial and environmental factors affecting potentially active phosphorus (H₂O-P + NaHCO₃-Pi) in factory compost.
• Compare phosphorus bioavailability between chicken manure and kitchen waste compost.

Main Methods:

• Comparative analysis of phosphorus fractions (AP, H₂O-P + NaHCO₃-Pi) during composting.
• Assessment of microbial diversity using molecular techniques.
• Correlation analysis of environmental factors (moisture, pH) with phosphorus bioavailability.

Main Results:

• Chicken manure compost exhibited significantly higher available phosphorus (AP) and H₂O-P + NaHCO₃-Pi compared to kitchen waste compost (P < 0.05).
• Chicken manure compost showed higher α-microbial diversity.
• Novibacillus, Marinococcaceae, and Bacillales were identified as core bacteria for bioavailable phosphorus conversion.
• Moisture and pH were identified as key environmental factors significantly influencing bioavailable phosphorus (P < 0.05).

Conclusions:

• Chicken manure is a superior feedstock for enhancing phosphorus bioavailability in compost.
• Microbial communities and environmental parameters like moisture and pH are critical regulators of phosphorus bioavailability.
• Findings support optimizing composting processes for improved phosphorus utilization efficiency.