- 低溶解氧污泥微膨胀前后污泥硝化活性的对比研究
- Comparison Analysis of Sludge Nitrification Activity Before and After Microbulking with Low Dissolved Oxygen
- 左金龙， 王淑莹， 彭赵旭， 姜安玺， 刘洋， 彭永臻， 孙治荣
- 土木与环境工程学报（中英文） 2009年31卷第4期 页码：117-122
- DOI：10.11835/j.issn.1674-4764.2009.04.023
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纸质出版日期：2009
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摘要
为了研究低溶解氧微膨胀前后污泥硝化活性的变化，采用SBR反应器，平均DO浓度为0.6 mg/L~0.9 mg/L，测定污泥微膨胀前后污泥氧消耗速率曲线。结果表明：发生污泥微膨胀后，活性污泥对COD的去除能力有较大的提高，而对氨氮去除能力却有一定的下降。污泥微膨胀前后的氧消耗速率曲线显示，微膨胀前活性污泥总活性为67.72 mgO2/gVSS·h，其中硝化活性为43.12 mgO2/g VSS·h，占其总活性的63.67%；而微膨胀后活性污泥总活性为90.49 mgO2/gVSS·h，其中硝化活性为2
Abstract
In order to investigate the variation of sludge nitrification activity before and after microbulking with low dissolved oxygen(DO), with mean DO value of 0.6mg/L-0.9 mg/L，the sequence batch reactor (SBR) was employed to test the oxygen consumption velocity curves before and after microbulking. The results showed that COD removal ability increased, whereas the ammonia nitrogen removal effect was decreased with microbulking of sludge. The oxygen consumption velocity curves before and after microbulking showed that the total activity of activated sludge was 67.72 mgO2/gVSS·h before microbulking, of which nitrification activity was 43.12 mgO2/gVSS·h, that is, 63.67% of the total activity. And the total activity of activated sludge was 90.49 mgO2/gVSS·h after microbulking, of which nitrification activity was 23.98 mgO2/gVSS·h, that is, 26.51% of the total activity. The low DO value was the limited substrates for microorganism growth. When activated sludge was in the state of microbulking, the filamentous bacteria were the dominant bacteria, whereas the nitrification bacteria were subordinate. Thus the total nitrification activity of activated sludge decreased.
