【摘要】 为了研究降低大幅快速降温对活性污泥系统的影响,采用SBR反应器,控制平均DO浓度1.5mg/L左右,考察了大幅度降温对活性污泥系统的影响。结果表明:当系统温度从25℃大幅度降温到14℃时,可引发活性污泥沉降性指标恶化,SVI值明显升高并导致污泥膨胀。当系统温度恢复至常温25℃后,SVI值有一定程度的下降,但并未恢复到SVI的正常范围。大幅度降温对活性污泥系统磷和COD的去除效果影响较小,而对活性污泥硝化效果有较大影响。大幅度降温后系统的氨氮去除率下降至20%左右。当系统温度恢复到常温后,活性污泥的硝化效果可以恢复。更多还原

【Abstract】 In order to investigate the effect of quickly decrease temperature on activated sludge system,with the operation of sequence batch reactor(SBR) and mean DO value at 1.5 mg/L,the sludge volume index(SVI) and pollutants removal effect with quickly decreased and return normal temperature were analyzed.The results show that the SVI increases to activate sludge bulking,and activated sludge sedimentation property worsens when the system temperature quickly decreases from 25℃ to 14℃.The SVI slightly decreases,but it cannot return to normal range when system temperature returns to 25℃.The phosphorus and COD removal effects are slightly affected by quickly decreased temperature,whlle the activated sludge nitrification is severely affected by quickly decreased temperature.with the ammonia removal efficiency decreased to 20%.The activated sludge nitrification can return to normal level when system temperature returns to normal temperature.更多还原