Hydrogen peroxide plus ascorbic acid enhanced organic matter deconstructions and composting performances via changing...

Area of Science:

• Environmental Science
• Microbiology
• Soil Science

Background:

• Co-composting of lignocellulosic materials like bagasse pith with manure is crucial for waste management.
• Understanding the impact of additives on composting processes is essential for optimizing efficiency and product quality.

Purpose of the Study:

• To investigate the effects of hydrogen peroxide (H2O2) and ascorbic acid (ASCA) on the co-composting of bagasse pith and dairy manure.
• To analyze the influence of these additives on physicochemical properties, organic matter decomposition, humification, and bacterial community dynamics.

Main Methods:

• Co-composting experiments were conducted with bagasse pith and dairy manure.
• Hydrogen peroxide (H2O2) and ascorbic acid (ASCA) were added as treatments.
• Physicochemical characteristics, organic matter (OM) deconstruction, humification degree, and bacterial community succession were analyzed using techniques including Redundancy Analysis (RDA).

Main Results:

• H2O2 and ASCA significantly accelerated lignocellulose degradation and improved the transformation of dissolved organic matter (DOM).
• Additives enhanced the content and aromatization degree of humic substances (HS).
• Bacterial communities shifted, with notable increases in Firmicutes and Actinobacteria abundance, influenced by OM and lignocellulose degradation.

Conclusions:

• Adding H2O2 and ASCA effectively accelerates lignocellulose degradation and enhances the overall composting process.
• These additives offer an optimized method for disposing of lignocellulose wastes and livestock manure.
• The study highlights the role of specific bacterial groups in the improved composting efficiency.