State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China.
Yixing Environmental Research Institute of Nanjing University, Yixing 214200, Jiangsu, China.
Chemosphere. 2022 Nov;307(Pt 4):135802. doi: 10.1016/j.chemosphere.2022.135802. Epub 2022 Aug 8.
In order to reveal the status and trends of chemical treatment for wastewater, the patents analysis from both structured and unstructured data was performed in this study. 35,838 patents recorded in the Derwent Innovation Index database were adopted. The results showed that China was the country with the largest number of patents in the field, and the United States was the main exporter of international technology flows. Chemical processes combined with biological and physical processes was the mainstream, and ozonation and electrochemical treatment were the major single technologies. Technology evolution path generally showed the transition from biological process-combined chemical treatment to electrochemical treatment and finally to physical process-combined chemical treatment. Furthermore, future trends were revealed from both patents and papers. It demonstrated that efficient removal of ammonia nitrogen, green water treatment agents and resourcezation of wastewater were the key innovation directions, and technologies with regard to efficient use of energy (including photocatalytic technology and microbial fuel cell) were the main research hotspots. Overall, this study provided a comprehensive understanding for the research and application of chemical treatment for wastewater technologies.
为揭示废水化学处理的现状和趋势，本研究采用专利分析方法对结构化和非结构化数据进行了分析。共采用了德温特创新索引数据库中记录的 35838 项专利。结果表明，中国在该领域拥有最多的专利，美国是国际技术流的主要输出国。化学工艺与生物和物理工艺相结合是主流，臭氧氧化和电化学处理是主要的单一技术。技术演化路径通常表现为从生物过程-化学联合处理向电化学处理再向物理过程-化学联合处理的转变。此外，还从专利和论文两个方面揭示了未来的发展趋势。研究表明，高效去除氨氮、绿色水处理剂和废水资源化是关键的创新方向，而高效利用能源的技术（包括光催化技术和微生物燃料电池）是主要的研究热点。总的来说，本研究为废水化学处理技术的研究和应用提供了全面的了解。
