- 大幅度快速降溫對活性污泥系統(tǒng)的影響
- Analysis of Effect of Quickly Decreased Temperature on Activated Sludge System
- 左金龍
- 土木與環(huán)境工程學報（中英文） 2012年34卷第5期 頁碼：121-125
- DOI：10.3969/j.issn.1674-4764.2012.05.019
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紙質出版日期：2012
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摘要
為了研究降低大幅快速降溫對活性污泥系統(tǒng)的影響，采用SBR反應器，控制平均DO濃度 1.5 mg/L左右，考察了大幅度降溫對活性污泥系統(tǒng)的影響。結果表明：當系統(tǒng)溫度從25 ℃大幅度降溫到14 ℃時，可引發(fā)活性污泥沉降性指標惡化，SVI值明顯升高并導致污泥膨脹。當系統(tǒng)溫度恢復至常溫25 ℃后，SVI值有一定程度的下降，但并未恢復到SVI的正常范圍。大幅度降溫對活性污泥系統(tǒng)磷和COD的去除效果影響較小，而對活性污泥硝化效果有較大影響。大幅度降溫后系統(tǒng)的氨氮去除率下降至20%左右。當系統(tǒng)溫度恢復到常溫后，活性污泥的硝化效果可以恢復。
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.
