首页
最新动态 交流合作 科研项目 论文著作 精彩瞬间 招生招聘
  • Impact of phenolic-formaldehyde resin microplastics on anaerobic granular sludge: EPS interaction mechanisms and impacts on reactor performance
  • 来源:王志伟副教授个人网站 2024-10-30
  • This paper investigates the effects of phenolic-formaldehyde resin microplastics (PF-MPs) with different particle sizes on anaerobic granular sludge (AnGS) and reveals the complex interaction mechanisms between extracellular polymeric substances (EPS) and PF-MPs through the combination of molecular dynamics simulations and spectroscopy. PF-MPs provide a new ecological niche for microorganisms. Microorganisms and EPS can adhere and accumulate on the surface of PF-MPs, producing highly active floc sludge inside the reactor, thereby increasing the chemical oxygen demand (COD) removal rate and methane production of the reactor. However, the high metabolic activity of floc sludge consumes the biodegradable components in EPS, resulting in loose rupture of the sludge particles and reduced particle size. In addition, small particle size S-PF can adhere to the sludge surface,which caused mass transfer barriers and reduced the expression of genes and enzyme activities for the sludge acidification process and the main methanogenic processes. Insufficient internal nutrients lead to endogenous metabolism within the granules, causing internal hollowing, which affects the density and settling performance of the sludge. Monolayer physical adsorption plays a major role in the adsorption of EPS on PF-MPs. 2D-COS and FTIR spectroscopy were used to elucidate the preferential binding of polysaccharides to PF-MPs. This paper explores the fate of PF-MPs in anaerobic systems and demonstrates the important role of EPS in the capture of microplastics by granular sludge, providing a theoretical basis for understanding the migration of microplastics in wastewater treatment.
  • [来源:中国聚合物网]
  • 了解更多请进入: 王志伟副教授个人网站
相关新闻
  • · 基于配位作用的木质素基阻燃/自修复聚氨酯弹性体的制备及性能研究
  • · Surface modification of polyurethane foam with zeolite and zero-valent iron promotes short-cut nitrification
  • · Transitional bimetallic heterostructure catalyst modified anode for microbial fuel cell treatment of high-intensity wastewater
  • · Review of the mechanism and control methods of anaerobic granular sludge calcification

关于我们  |  联系我们  

网站:中国聚合物网

polymer.cn Copyright ©2017