定义了好氧状态、厌氧状态和亏氧状态的生化降解过程。
The authors give the definition of biochemical degradation process from the aerobic state to the anaerobic state;
在厌氧状态下补充碳源会大大增强反硝化作用，提高对氮的去除效果。
Addition of organic carbon in anaerobic environment can enhance the denitrification process and improve the nitrogen removal efficiency.
旱季时由于水力负荷极小，水体流动性差，系统内处于厌氧状态，出现了磷的释放。
During dry season with low hydraulic load, the system is at an anaerobic condition due to insufficient water mobility, and phosphorus release from the media occurs.
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