Abstract: The research at home and abroad on sludge reduction by ozonation is reported in detail. Most attention is paid to the principle of sludge reduction by ozonation，efficiency of sludge reduction，relationship between efficiency and ozone dosage，as well as the effect of return sludge ozonation on wastewater treatment running and sludge settling and dewatering characteristics. Sludge reduction by ozonation can minimize excess biomass，have less impact on the effluent water quality，further more，can improve the system’s denitrification. Sludge reduction by ozonation shows a wide application foreground.

摘要： 阐述了臭氧化污泥减量技术的机理、臭氧化污泥的性状变化、污泥减量效果的影响因素、污泥臭氧化对出水水质的影响等。表明了臭氧化污泥减量技术在不影响出水水质的情况下，能有效地减少剩余污泥量，还能提高系统的反硝化能力，具有广阔的应用前景。