Research and application of biochar in China
China is facing major environmental challenges, among which are soil contamination and quality deterioration, crop residue disposal other than field burning, and substantial agricultural greenhouse gas emissions. An innovative solution to these challenges is to convert agricultural byproducts into biochar and apply the biochar to farmland as a soil conditioner. Intensive scientific studies and pilot trials have been implemented in different regions of China to validate the agronomic and environmental benefits of soil biochar and to develop practical biochar fertilization programs.
The annual generation of crop residues in China is approximately 790 million tons, providing abundant feedstock for biochar production. Universities and research institutions across the nation have been organizing rigorous experiments and trials to optimize organic waste-based biochar production, to formulate different biochar fertilizers, and to design best biochar application practices for nurseries, vegetable gardens, corn fields, and rice paddies with diverse soil types and climate regimes. Pyrolysis equipment at mobile, small, and moderate scales has been developed. A number of companies are commercially producing biochar, bio-oil, and syngas from crop residues, animal manures, and biosolids.
A chapter (Research and Application of Biochar in China) in the book Agricultural and Environmental Applications of Biochar: Advances and Barriers provides an overview on (i) the state of the art of biochar production in China, (ii) the achieved agronomic benefits of biochar application in this country, (iii) the potential of biochar application in China for mitigating greenhouse gas emissions, (iv) biochar application for remediation of China contaminated soils, and (v) the major barriers to and the attained progress in biochar commercialization in China. The authors also identify the existing challenges and future directions for expanding biochar utilization in the country.
View this chapter and others from this book online at http://bit.ly/1ptPi6l