基于高附加值产品的废水资源化技术发展趋势与应用展望

Wastewater now has been recognized as a valuable resource from which organic matters, nitrogen, phosphorus, and other constituents can be harvested to produce valuable and marketable products. In this study, wastewater treatment in most world countries and regions is experiencing a paradigm shift from a resource-and capital-intensive pollutant removal scenario to a circular economy, and thereby reducing significant pressures on natural resources attributed from increasing populations and human activities. Based on literature review and preliminary explorations, this review article therefore aims to analyze and summarize the trends, perspectives and prospects on valorization of pollutants from wastewater into marketable products, primarily single cell protein, polyhydroxyalkanoate, bacterial cellulose, struvite and vivianite, with the goal of providing implications beneficial for future efforts on development and innovation of concepts, theories and approaches to enable resource recovery and valorization from wastewater and thereby mitigating ever-growing demands on traditional natural resources. The bottle necks and challenges faced by these technologies were discussed. This will provide reference for the next generation technology system of wastewater treatment and resource products which can meet the new requirements of the rebuilt social enconmy development in water pollution control field.