Evaluating the Effects of Different Pretreatments on Anaerobic Digestion of Waste Activated Sludge Containing Polystyrene Microplastics

• DOI: 10.1021/acsestwater.1c00294
• Publication Date: 2021-11-10T14:42:43Z
• Authors: Yanjing Zeng; Xiang Tang; Changzheng Fan; Lin Tang; Man Zhou; Baowei Zhang; Ran Wang; Guiting Li
• Keywords: Digestion

A majority of microplastics (MPs) in wastewater treatment plants are aggregated waste activated sludge (WAS) and potentially threaten the subsequent anaerobic digestion. Meanwhile, many physical chemical techniques have been used as pretreatment methods to improve digestion WAS. However, effects frequently pretreatments on MPs during WAS remain poorly characterized. Here, impacts (ultrasonic thermal methods) (alkaline Fenton performance containing polystyrene (PS-MPs) were investigated. Thermal showed obvious improvements disintegration, methane yields which increased by 17.5–20.4%. The concentrations sodium dodecyl sulfate leached from PS-MPs chemically pretreated groups 1.7–2.6 times higher than those spite high efficiency In addition, generation reactive oxygen species among four no significant difference (p > 0.05) a slight increase compared with that control. As for long-term microbial communities, thermally digester exhibited highest proportion methanogens (phyla Halobacterota Euryarchaeota) pretreatments, accounting 13.2%. From perspectives toxic alteration MPs, is more recommended PS-MPs.