温度对活性污泥产率的影响研究

Effect of Temperature on Activated Sludge Yield

研究了不同温度控制策略下活性污泥表观产率的变化,发现污泥表观产率随温度的降低而升高,且升高幅度逐渐增大。为进一步研究温度对污泥内部机制的影响,结合温度变化对污泥外源活性(SOUR_(ex))、内源活性(SOUR_(en))、真实产率、衰减系数及水解效率等方面的影响进行系统研究,结果显示,污泥真实产率受温度影响不大,而污泥衰减系数、水解效率、SOURen及SOURex等均随温度的降低而降低。根据Lawrence-McCarty模型分析认为,温度降低致使污泥表观产率增加的主要原因是低温条件下污泥的衰减速率降低。

The variation of apparent yield of activated sludge under different temperatures was studied, and it was found that the sludge yield increased significantly with the decrease of temperature. To further study the effect of temperature on the internal mechanism of activated sludge, the relationship of SOURen, SOURex, actual yield （ YH ）, decay coefficient （ bH ） and hydrolysis efficiency to temperature was investigated. The results showed that the temperature had less influence on the YH, but SOURon, SO- URex, bH, and hydrolysis efficiency decreased with the decrease of temperature. According to the analysis with Lawrenee-McCarty model, the increase of the apparent yield of activated sludge was mainly due to the decrease of the decay rate at low temperature.