[Production of a compost accelerator inoculant]

Area of Science:

• Agricultural Science
• Environmental Science
• Microbiology

Background:

• Composting is a vital process for managing organic waste, such as ovine manure and straw.
• Optimizing composting efficiency can reduce processing time and improve final compost quality.
• The use of specific microbial inocula can potentially enhance composting dynamics.

Purpose of the Study:

• To evaluate the impact of ovine manure compost inoculum, extracted at different stages, on reducing biotransformation time.
• To assess the effect of these inocula on the physicochemical and biological parameters of the composted ovine manure.
• To identify the optimal timing for inoculum extraction to accelerate the composting process.

Main Methods:

• Ovine manure and straw mixture composted, with inocula extracted at 18, 23, 28, 33, and 38 days.
• Six treatments established: control (straw+manure) and five treatments with different aged inocula.
• Compost parameters monitored included CO2 production, temperature, pH, electric conductivity, organic matter, total nitrogen, total carbon, C:N ratio, particle size, and bulk density.

Main Results:

• Treatments T2 (23-day inoculum) and T5 (38-day inoculum) showed significant differences in CO2 production (p ≤.05).
• These specific inocula demonstrated an acceleration of microbial dynamics and the overall composting process.
• Reduced CO2 production indicated the compost's quality and maturity were achieved.

Conclusions:

• Inoculum age significantly influences composting efficiency, with 23-day and 38-day inocula being most effective.
• The strategic use of aged compost inoculum can substantially reduce biotransformation time.
• This research provides insights into optimizing composting processes for ovine manure through targeted microbial inoculation.