Research progress on the effects of phthalate plasticizers on anaerobic digestion of residual sludge from sewage treatment
Phthalic Acid Esters(PAEs)are a kind of common plasticizers,which are widely used in the manufacturing process of plastic products.PAEs will enter the sewage due to various reasons and ways such as the decomposition and release of plastic products,and gradually migrate to the excess sludge of the sewage treatment plant for enrichment.Anaerobic digestion is the main resource disposal method of ex-cess sludge in sewage treatment plants.The accumulation of PAEs in sludge will have different effects on the hydrolysis,acidification,acetic acid and methanogenesis stages and functional microbial flora in the anaerobic digestion process of excess sludge.However,there are many kinds of PAEs with large concentra-tion differences and certain regional characteristics.It is necessary to analyze the specific effects and mechanisms of different kinds of PAEs on the anaerobic digestion of excess sludge in detail.And summa-rized the types,sources and detection status of PAEs in residual sludge,and compares and analyzes the effects of different types of PAEs on the anaerobic digestion process of excess sludge in detail,in order to provide theoretical basis and technical guidance for researchers in the future in-depth research and engi-neering technology development.
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