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Field test of methane fermentation system for treating swine wastes
Summary
A novel methane fermentation system effectively treats swine waste, converting it into biogas and compost. This system demonstrates efficient pre-treatment, digestion, and post-treatment processes for sustainable waste management.
Area of Science:
- Environmental Engineering
- Biotechnology
- Waste Management
Background:
- Swine waste presents significant environmental challenges due to its high organic load and potential for pollution.
- Effective treatment systems are crucial for managing agricultural byproducts and mitigating environmental impact.
Purpose of the Study:
- To develop and evaluate a comprehensive methane fermentation system for swine waste treatment.
- To assess the efficiency of integrated physical pre-treatment, anaerobic digestion, and oxidation ditch post-treatment.
Main Methods:
- A pilot-scale system incorporating a screw-press dehydrator, methanogenic digester, sludge separator, oxidation ditch, and composting equipment was utilized.
- Performance was evaluated based on solids and chemical oxygen demand removal, biogas production, and treated water quality.
Main Results:
- Screw-press pre-treatment removed 38% of total solids and 22% of chemical oxygen demand.
- Methane fermentation achieved 65% chemical oxygen demand removal, producing biogas with 67% methane content.
- The system converted 1 m3 of swine waste into 25 m3 biogas, 100 kg compost, and 0.80 m3 treated water.
Conclusions:
- The developed methane fermentation system is effective for swine waste treatment, yielding valuable biogas and compost.
- The integrated approach demonstrates efficient removal of pollutants and resource recovery from agricultural waste.