With the development of global agriculture, the annual output of rice straw, one of the crop wastes, exceeds 700 million tons. However, traditional treatment methods pollute the environment and waste resources. Therefore, the preparation of biochar from rice straw has become a hot research topic. This study aims to analyze the process of preparing biochar from rice straw, to explore the effects of pyrolysis process parameters on the characteristics of biochar, and to give a prediction of the yield of biochar under ideal conditions. On the basis of available data, this study found that the biochar produced under 200°C and 1 h pyrolysis condition has the highest yield and carbon content, which is an ideal soil conditioner; the biochar produced under 400°C and 1 h condition has high carbon content and good stability, which is more suitable for long-term carbon storage. In addition, biochar is effective in improving soil quality, increasing agricultural production, and reducing greenhouse gas emissions. This study opens up new ideas for the high-value utilization of rice straw, which can help promote the sustainable development of agriculture and realize the synergistic development of efficient resource utilization and environmental protection.
Yutong Wang (Tue,) studied this question.
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