二级出水中膜污染水征有机物受突发环境事件影响的变化规律、机理及膜污染效应研究

针对当前突发环境事件频发，影响污水厂深度处理所用膜工艺的稳定性问题，本申请以二级出水关键膜污染水征有机物为研究对象，揭示突发环境事件影响其变化与分布的规律；利用基因毒理分析手段，探究微生物细胞受冲击情况下释放这些有机物的分子生物学机制；应用微生物生态学研究技术，揭示突发环境事件影响污水厂微生物种群结构和污泥絮体构象的变化，建立与膜污染水征有机物生成的关联关系；对不同条件下生成的膜污染水征有机物进行分离和表征，量化它们在独立和协同作用下的膜污染差异，阐明不同环境事件带来的膜污染效应与机理。研究成果对降低突发环境事件影响污水厂运行的负面影响，提高应对能力和控制水平有直接指导意义，对理解污水厂受突发环境事件影响其二级出水超滤膜污染的机理具有重要的科学价值。

Currently, environmental accidents have been increasing with respect to their number, intensity and types, which would affect the stability of wastewater treatment processes and membrane operation for wastewater reclamation. Taking the key organic foulants, which are mainly specific fractions of solvable microbiological products, in secondary effluent as the research objective, the present proposal aims at understanding the impact of environmental accidents on such organics in terms of their content, composition and distribution in secondary effluent. The release mechanisms of these organics would be tracked by using gene toxicity analysis methods. Microbiological structure and sludge properties would also be analyzed and related to the releasing of these organic foulants. As the property of foulants formed under the shock of different environmental accidents, fouling effect and relevant mechanisms would be studied after isolation and fractionation of organics. The outcomes from the present work would be used to guide wastewater treatment plants against the impact of environmental accidents and improve the stability of membrane systems operation.