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Related Experiment Videos

Accelerated coffee pulp composting.

G Sánchez1, E J Olguín, G Mercado

  • 1Department of Environmental Biotechnology, Institute of Ecology, México.

Biodegradation
|July 29, 1999
PubMed
Summary

Adding sugar industry filter cake and poultry litter to coffee pulp significantly speeds up composting and improves compost quality. These low-cost agro-industrial residues create a more stable compost with higher nitrogen content.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Soil Science

Background:

  • Coffee pulp is an abundant agro-industrial residue requiring effective stabilization methods.
  • Filter cake and poultry litter are low-cost, readily available organic materials.
  • Optimizing composting of coffee pulp can reduce waste and create valuable soil amendments.

Purpose of the Study:

  • To evaluate the impact of filter cake and poultry litter on coffee pulp composting.
  • To determine the effect of these amendments on compost stabilization time and quality.
  • To identify optimal amendment ratios for enhanced composting.

Main Methods:

  • Composting piles (1 m³) were constructed using coffee pulp with varying ratios of filter cake and poultry litter.
  • Piles were monitored for temperature, C/N ratio, and reducing sugar assimilation.
  • Manual aeration was performed weekly.

Main Results:

  • Amendments significantly reduced the C/N ratio (6.9-9.1 vs. 14.4) and extended the thermophilic period (28 days vs. 14 days).
  • The best amendment combination (30% filter cake, 20% poultry litter) yielded a final nitrogen content of 4.81%.
  • Reducing sugar assimilation was faster in amended piles compared to the control.

Conclusions:

  • Filter cake and poultry litter effectively accelerate coffee pulp composting.
  • These amendments produce a higher quality compost with increased nitrogen content.
  • Utilizing these agro-industrial residues offers a sustainable approach to coffee pulp waste management.

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