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Measuring Biomethane Potential of Food Scrap Waste Anaerobically Co-Digested with Waste-Activated Sludge Using Respirometry
Published on: April 26, 2024
[Novel resources utilization technique for rural domestic refuse]
Cai-Di Qiu1, Ruo He, Song-Mei Chen
1Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China. qiucaidi@yahoo.com.cn
Huan Jing Ke Xue= Huanjing Kexue
|May 13, 2009
Summary
Intermittent aeration effectively treats rural domestic refuse post-anaerobic fermentation, removing water and organic matter. Optimal treatment involves specific aeration rates and is most effective on younger refuse for resource utilization.
Area of Science:
- Waste Management
- Environmental Engineering
- Biotechnology
Context:
- Rural domestic refuse requires efficient resource utilization.
- Anaerobic fermentation is a precursor treatment step.
- Aeration strategies (intermittent vs. continuous) are explored for post-fermentation treatment.
Purpose:
- To evaluate the effectiveness of intermittent and continuous aeration for treating rural domestic refuse after anaerobic fermentation.
- To determine the impact of fermentative age on water and organic material removal efficiency.
- To assess nutrient concentration during aeration for resource recovery.
Summary:
- Aeration effectively removes water and organic materials from anaerobically fermented rural domestic refuse.
- Continuous aeration generally outperforms intermittent aeration.
- For intermittent aeration, water removal increases with ventilation, while organic removal efficiency decreases significantly with increased fermentative age.
- Intermittent aeration at 0.06 m3/(min x m3) for 21 days showed varying water (44.0–49.1%) and organic (13.1–41.9%) removal efficiencies based on fermentative age (3, 5, or 7 months).
- Aeration concentrates key nutrients like nitrogen, phosphorus, and potassium, facilitating resource utilization.
Impact:
- Identifies feasible parameters for intermittent aeration in rural domestic refuse treatment.
- Provides data on the influence of fermentative age on treatment efficiency.
- Demonstrates the potential for nutrient recovery and resource utilization from treated refuse.
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