Liu Shengtao, Su Chengyuan, Lu Yiying, Xian Yunchuan, Chen Zhengpeng, Wang Yuchen, Deng Xue, Li Xinjuan
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, 15 Yucai Road, Guilin 541004, PR China.
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, 15 Yucai Road, Guilin 541004, PR China; College of Environment and Resources, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
Sci Total Environ. 2023 Dec 1;902:166033. doi: 10.1016/j.scitotenv.2023.166033. Epub 2023 Aug 3.
Microplastics have been identified as an emerging pollutant. When microplastics enter wastewater treatment plants, the plant traps most of the microplastics in the sludge during sewage treatment. Therefore, the effects of microplastics on sludge removal performance, and on the physical and chemical properties and microbial communities in sludge, have attracted extensive attention. This review mainly describes the presence of microplastics in wastewater treatment plants, and the effects of microplastics on the decontamination efficiency and physicochemical properties of activated sludge, aerobic granular sludge, anaerobic granular sludge and anaerobic ammonium oxidation sludge. Further, the review summarizes the effects of microplastics on microbial activity and microbial community dynamics in various sludges in terms of type, concentration, and contact time. The mechanisms used to strengthen the reduction of microplastics, such as biochar and hydrochar, are also discussed. This review summarizes the mechanism by which microplastics influence the performance of different types of sludge, and proposes effective strategies to mitigate the inhibitive effect of microplastics on sludge and discusses removal technologies of microplastics in sewage. Biochar and hydrochar are one of the effective measures to overcome the inhibition of microplastics on sludge. Meanwhile, constructed wetland may be one of the important choice for the future removal of microplastics from sewage. The goal is to provide theoretical support and insights for ensuring the stable operation of wastewater treatment plants and reducing the impact of microplastics on the environment.
微塑料已被确认为一种新兴污染物。当微塑料进入污水处理厂时，该厂在污水处理过程中将大部分微塑料截留在污泥中。因此，微塑料对污泥去除性能以及污泥的物理化学性质和微生物群落的影响已引起广泛关注。本综述主要描述了污水处理厂中微塑料的存在情况，以及微塑料对活性污泥、好氧颗粒污泥、厌氧颗粒污泥和厌氧氨氧化污泥的去污效率、物理化学性质的影响。此外，该综述从类型、浓度和接触时间方面总结了微塑料对各种污泥中微生物活性和微生物群落动态的影响。还讨论了用于加强微塑料减量的机制，如生物炭和水炭。本综述总结了微塑料影响不同类型污泥性能的机制，提出了减轻微塑料对污泥抑制作用的有效策略，并讨论了污水中微塑料的去除技术。生物炭和水炭是克服微塑料对污泥抑制作用的有效措施之一。同时，人工湿地可能是未来从污水中去除微塑料的重要选择之一。目标是为确保污水处理厂的稳定运行以及减少微塑料对环境的影响提供理论支持和见解。
