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The abundance of microplastics in freshwater systems in China and the biotoxicity of microplastics in the world were reviewed. The analysis and identification methods of microplastics still have many limitations. Improving technical methods is of great significance for studying the aggregation and migration process of microplastics in environmental media. The establishment of an ecotoxicological assessment methods for microplastics and its compound pollution system and the enrichment of basic database will be a hot spot in this field in the future. Scholars and experts should combine international front scientific issues and analysis and identification difficulties, improve the recycling and waste management of plastic products, strengthen the detection of the concentration of microplastics in the environment, and explore the transfer efficiency of microplastics pollutants between different nutritional levels, continuously improve the biological toxicity effects and ecotoxicological mechanisms of microplastics and their compound pollutants. [ABSTRACT FROM AUTHOR]

This work presents the research progress of AGS resource recovery technology in recent ten years, and mainly summarizes methods to extract the high-value-added product in EPS from AGS, compares relative merits of different extraction methods and potential applications of different high-value-added products. This will provide technical supports for low-carbon efficient wastewater treatment process with AGS technology as the core technology, and provide valuable research thoughts for wastewater resource recovery. [ABSTRACT FROM AUTHOR]

The studies showed that numerous phosphorus element existed in anammox granular sludge. The phenomenon not only improved the settleablity and mechanical property of granular sludge, but also is conducive to the growth of anammox bacteria. At the same time, it can also achieve the purpose of recovering phosphorus by recycling granule sludge. Hence, based on the possible mechanism of biologically induced phosphorus removal by the anammox granular sludge,the advantages and the feasibility on the nutrients removal of anammox granular sludge process are summarized. Furthermore,the potential application of this process is proposed. [ABSTRACT FROM AUTHOR]