Assessment of gaseous emissions, fundamental relationships between operational parameters, and energy consumption during static enhanced aeration composting process
摘要
Composting is an environmentally friendly method for organic solid waste recycling and one of the carbon emission mitigation measures and contribute to sustainable SW management. However, gaseous emissions during the composting process are unavoidable and depends, to the large extent, on the climatic conditions and management of the composting process. The emissions of gases during the composting process and the interrelationships between the different operational parameters and energy consumption for static aerated composting system is scarce under Palestinian climate. Therefore, this study focuses on the assessment of gaseous emissions, energy consumption, and significant relationships between different operational parameters of static aerated composting systems. Two composting experiments were conducted at two different air flow rates and operational parameters were monitored and recorded. The results showed that the emissions of CH4, CO2, and H2S were in the range of 2.4–5.2%, 0.1–13.2%, and 0–4 ppm for Experiment 1, and 2–4%, 0.5–8.1%, and 0–5 ppm for Experiment 2, respectively. The correlation test identified several significant relationships between operational parameters and gaseous emissions during the composting process. However, the energy consumption and the related CO2-eq emissions from fossil-fuel energy sources used for aeration showed that CO2 emissions were 12.4 and 25 kg/kWh for Experiments 1 and 2, respectively.