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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production

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Published on: June 15, 2014

Diatomite-Mediated Humification and Fungal Community Succession During Composting.

Jun Xie^1,2, Min Liu¹, Xiaoying Mu¹

¹College of Biological Sciences and Technology, Taiyuan Normal University, Jinzhong 030619, China.

|June 26, 2026

Summary

Adding 8% diatomite to pig manure and wheat straw compost significantly improves organic matter degradation and humification. This amendment accelerates compost maturity and enhances fungal diversity, promoting beneficial microbial communities for better compost quality.

Keywords:

aerobic composting diatomite fungal community humification pig manure

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Area of Science:

Agricultural Science
Environmental Science
Microbiology

Background:

Compost quality is determined by organic matter degradation and humification.
Understanding the role of amendments in composting is crucial for sustainable waste management.

Purpose of the Study:

To investigate the effects of diatomite on organic component degradation, humification, and fungal community succession during aerobic composting of pig manure and wheat straw.
To determine the optimal diatomite concentration for enhancing composting efficiency and quality.

Main Methods:

A 40-day aerobic composting experiment comparing control, 4% diatomite, and 8% diatomite treatments.
Analysis of organic matter degradation, humification (HA/FA ratio), and fungal community structure (richness, diversity).
Statistical modeling (PLS-PM) to identify key regulators of humification.

Main Results:

8% diatomite significantly accelerated organic matter and lignin degradation (9.05% and 9.27% increase, respectively).
Compost maturity was reached 5-7 days earlier with 8% diatomite.
Fungal richness and diversity increased 1.8 and 2.6 times, respectively, with 8% diatomite, promoting thermophilic Ascomycota.
Diatomite shifted fungal interactions from competition to symbiotic cooperation, with fungal composition identified as a primary humification regulator.

Conclusions:

Diatomite, particularly at 8%, enhances composting efficiency and humification quality.
Optimizing fungal community structure and function through diatomite amendment is key to improving compost quality.
This study provides a theoretical and practical basis for using diatomite in agricultural waste composting.