The effect of temperature and sludge age on COD removal and nitrification in a moving bed sequencing batch biofilm reactor.
The effect of temperature and sludge age on COD removal and nitrification in a moving bed sequencing batch biofilm reactor.
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DOI：
10.2166/wst.2005.0395
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
H. Dulkadiroglu;E. Cokgor;N. Artan;D. Orhon
中科院分区：
文献类型：
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作者：
H. Dulkadiroglu;E. Cokgor;N. Artan;D. Orhon
研究了温度和泥龄对移动床序批式生物膜反应器（MBSBBR）去除COD和硝化性能的影响。实验在实验室规模的MBSBBR中进行，MBSBBR在三个不同的温度（20、15和10摄氏度）下操作，具有模拟生活污水特性的合成进料。结果表明，在所有的操作条件下，有机物的去除率高，效率超过90%，是有保证的。硝化速率显着影响温度的变化，但在每个温度下发生完全硝化。在20和15摄氏度下观察到的硝化速率非常接近（分别为0.241 mg NO（x）-N/m2 d、0.252 mg NO（x）-N/m2 d），但在10摄氏度下，它下降至0.178 mg NO（x）-N/m2 d。另一方面，随着时间的推移，生物量浓度和污泥龄增加，而VSS/TSS的比率，可以接受作为一个指标的活性生物量部分下降。研究认为，增加生物膜厚度和扩散限制对处理效果，尤其是硝化速率有负面影响。
This study investigates the effect of temperature and the sludge age on the performance of a moving bed sequencing batch biofilm reactor (MBSBBR) for COD removal and nitrification. The experiments are conducted in a lab-scale MBSBBR operated at three different temperatures (20, 15 and 10 degrees C) with a synthetic feed simulating domestic sewage characteristics. Evaluation of the results revealed that removal of organic matter at high rates and with efficiencies over 90% was secured at all operation conditions applied. The nitrification rate was significantly influenced by changes in temperature but complete nitrification occurred at each temperature. The nitrification rates observed at 20 and 15 degrees C were very close (0.241 mg NO(x)-N/m2d, 0.252 mg NO(x)-N/m2 d, respectively), but at 10 degrees C, it decreased to 0.178 mg NO(x)-N/m2d. On the other hand, the biomass concentration and sludge age increased while the VSS/TSS ratios that can be accepted as an indicator of active biomass fraction decreased with time. It is considered that, increasing biofilm thickness and diffusion limitation affected the treatment efficiency, especially nitrification rate, negatively.