Effects of earthworm casts and zeolite on the two-stage composting of green waste
The research paper investigates the impact of earthworm casts (EWCs) and zeolite (clinoptilolite, CL) on the two-stage composting process of green waste (GW). The study aims to enhance composting efficiency and product quality, addressing the challenges of traditional composting methods that can take 90 to 270 days. The research involved varying proportions of EWCs (0.0%, 0.30%, and 0.60%) and CL (0%, 15%, and 25%) to determine their effects on composting conditions and the final compost quality.
Key findings include:
- The combination of EWCs and CL significantly improved the composting process, enhancing thermophilic phases, humification, microbial activity, and nutrient content.
- The optimized two-stage composting method allowed for compost maturation in just 21 days, compared to traditional methods.
- The best results were achieved with 0.30% EWCs and 25% CL, which improved physical properties like bulk density and water-holding capacity, moderated pH and electrical conductivity, and reduced nitrogen loss.
- The study also highlighted the role of EWCs in promoting microbial growth and enzyme activity, leading to faster degradation of cellulose and hemicellulose.
- The final compost produced was rich in nutrients and demonstrated high seed germination rates, indicating its suitability as a soil amendment.
This research paper is significant in the field of waste management and composting, as it presents a practical solution to enhance the efficiency of composting processes, particularly for urban green waste. By demonstrating the effectiveness of EWCs and CL, the study contributes to ongoing discussions about sustainable waste management practices and the development of high-quality compost products. The findings can benefit researchers, practitioners, and policymakers by providing insights into optimizing composting methods, reducing environmental impact, and improving soil health through better compost quality.
