摘要
研究了醚化和接枝共聚双改性固废渣(D-MPR)对污泥中结合水分布的影响,从而改善污泥脱水性能;对处理剂的性质、处理后污泥的固液相和结合水释放的动态分析进行了研究。用结合水结合能来体现污泥减量的过程机理。结果表明,D-MPR能够破坏污泥稳定的胶体体系,促进污泥大絮凝体的形成,增强污泥中“难释放”结合水的脱除,提高污泥的脱水性能。加入12‰~15‰DS的D-MPR,能够脱除污泥中约93.98%的结合水,处理后污泥结合水Eb增加到289 kJ/kg左右,污泥中毛细结合水和表面结合水全部去除,并将占比6%的细胞内结合水留在污泥中。此外,本研究还建立了多元回归模型,胞外聚合物(EPS)含量和污泥比阻(SRF)影响污泥结合水释放,而污泥絮体体积增加有利于污泥脱水。
The effect of etherification and graft copolymerization of dual-modified solid waste residue (D-MPR) on the distribution of bound water in sludge were investigated, which can improve the sludge dewatering performance. The dynamic analysis of the properties of the treatment agent , the solid-liquid phase of the treated sludge and the release of the bound water was investigated, and the binding energy of the bound water was used to represent the mechanism of the process of sludge volume reduction. The results showed that D-MPR could destroy the stable colloidal system of sludge, promote the formation of large flocs in the sludge, enhance the removal of “difficult-to-release” bound water in sludge, and improve the dewatering performance of sludge. The addition of D-MPR with 12‰—15‰ DS can remove 93.98% of the bound water from the sludge, and the E b of the sludge bound water increases to about 289 kJ/kg after the treatment. All the capillary and surface bound water in the sludge are removed, and 6% of intracellular bound water is left, in the sludge. In addition, a multivariate regression model was developed here to show that the EPS content and sludge specific resistance SRF affects the release of sludge bound water, and the increase of sludge floc volume is favorable to sludge dewatering.
作者
罗越涛
马丽萍
谢龙贵
杨杰
殷霞
杜旺
孙铭艺
戴取秀
LUO Yuetao;MA Liping;XIE Longgui;YANG Jie;YIN Xia;DU Wang;SUN Mingyi;DAI Quxiu(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《材料导报》
北大核心
2025年第12期270-276,共7页
Materials Reports
基金
中国博士后科学基金(2019M663578)
云南省基础研究计划(202201AU070015,202301AU070060)。
关键词
污水污泥
固废渣
脱水性能
结合能
sewage sludge
solid waste residue
dewatering performance
binding energy
