目前，市政污泥的产量随着污水处理率的增加而逐年递增，高效的污泥调理、脱水处理技术的需求极为迫切。本研究基于污水处理厂中絮状污泥脱水性能提升的需要，以絮状污泥水凝胶结构的凝胶化关键物质的破解为主线，采用先进的性质测试与结构鉴定技术，揭示絮状污泥中凝胶化关键EPS组分及其结构；然后根据该EPS组分结构进一步筛选能够定向降解的高效酶，建立定向酶降解-磁场耦合调理技术体系，研究其对絮状污泥的调理脱水效果与最佳操作参数，探讨调理过程中絮状污泥的水凝胶结构、异质性结构、理化性质、EDLVO作用能、水分分布的变化规律，揭示该耦合调理技术的协同效应，明确基于凝胶化关键物质的絮状污泥调理脱水过程的强化机制，抽象出该作用过程的概念模式。上述研究成果可以为污泥调理技术的发展提供基础支撑和技术启发，并丰富污泥调理技术的科学理论和技术储备，从而推动污泥高效脱水技术的发展与应用。

Now the production of sewage sludge increases year by year with the rise of wastewater treatment rate in our country, it is necessary to develop the high-efficiency sewage sludge conditioning-dewatering tehchnology. On the basis of demand for improving the dewaterability of flocculent sludge, this project takes the disruption of key gelation components in hydrogel structure of flocculent sludge as the main line. The following research works will be done: identification of chemical components and structure of key gelation substance in flocculent sludge using advanced characteristics analysis and structural identification techniques; screening the high efficiency enzymes for directional degradation of key gelation substance(some EPS fractions); building the enzymatic directional degradation coupled magnetic field conditioning technology, investigating its conditioning-dewatering efficiency and optimum operation parameters for flocculent sludge, discussing the changes in hydrogel structure, structural heterogeneity, physicohemical characterisitics, EDLVO interaction energy and moisture distribution of flocculent sludge. Furthermore, both the synergistic effect and enhanced mechanisms of the enzymatic directional degradation coupled magnetic field conditioning technology based on the key gelation components will be revealed, the conceptual models for aforementioned process will also be derived as well. The research results of this project will play a fundamental, supporting and inspiration role in the sewage sludge conditioning-dewatering technology, and will enrich its scientific theory and technical reserves. It will promote the development and application of high-efficiency dewatering technology for sewage sludge.