【摘要】 重点分析了非稳态DO环境下废水生物处理效果,并对其研究发展趋势进行了展望。非稳态DO环境营造了良好的硝化/反硝化条件,不仅能显著提高系统去除有机物和脱氮的效率,而且能降低曝气能耗,减少剩余污泥产量,在保证出水水质的前提下降低污水处理费用。但非稳态DO环境下如何确定合适的运行周期和DO浓度,以减少生物处理过程中溶解性微生物产物（SMP）和温室气体N₂O的产生量,将是未来值得探索的研究方向。更多还原

【Abstract】 The effect of biological wastewater treatment under unsteady DO conditions are analyzed emphatically,and the developing trend of its research is forecast. The unsteady DO condition has constructed an appropriate nitrification/denitrification environment. It can not only increase the removing rates of organic substances and nitrogen significantly,but also reduce the energy consumption for aeration and lessen the residual sludge amount. With the precondition for guaranteeing the effluent water quality,the wastewater treatment cost is reduced. However,how to determine suitable operation cycle and DO concentration under unsteady DO conditions,so as to reduce the production of SMP and greenhouse gas N₂O in the process of biological treatment,will be a worthwhile research exploring direction in the future.更多还原