磁强化处理技术在城市污水处理中的研究与应用进展

磁粉比重高易分离同时具有良好的生物效应，投加磁粉或外加磁场可强化混凝、活性污泥、厌氧消化等常规技术，提升城市污水预处理、生物处理、深度处理和污泥处理等单元的处理效率.在文献及工程调研的基础上，分析介绍磁强化混凝，磁强化活性污泥和磁强化剩余污泥处理3大类技术的研究应用现状与未来发展趋势.磁强化技术在未来城市污水处理厂中具有广泛的应用前景，有助于实现城市污水厂能量平衡与合流制溢流污染控制，为城市污水处理提供新思路.

Analyse of magnetically enhanced treatment in municipal sewage system

With high-density and magnetism effect, magnetic powder is easily separated and recycled, and has potentially positive effects on biological behavior. Magnetic-based technology is commonly applied to improve the processing capacity for biological treatment, in-depth treatment and sludge treatment and so forth via coupling with chemical coagulation, activated sludge, anaerobic digestion and other technologies. Based on literature and engineering investigation, we analyzed comprehensively the current progress and developing trend in magnetically enhanced coagulation, magnetically enhanced activated sludge and magnetically enhanced excess sludge treatment. Magnetically enhanced technology shows great prospect in next generation WWTP, it bolsters the WWTP to meet new goals in energy neutrality and combined sewer overflows pollution control, which provides neo-route for efficient municipal wastewater treatment.