Performance Improvement of Activated Sludge Wastewater Treatment by Nonlinear Natural Oscillations
Performance Improvement of Activated Sludge Wastewater Treatment by Nonlinear Natural Oscillations
复制标题
非线性自然振荡活性污泥废水处理性能改进
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
A. Ray
中科院分区：
文献类型：
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作者：
Shen Jianqiang;A. Ray
本文介绍了一种提高生化反应器性能的新运行策略。研究了两个循环耦合的连续搅拌槽反应器在产生自持自然振荡的极限环区运行时的动态行为。然后，一个反应堆的周期性输出被用作另一个反应堆的强制输入。将该新型运行策略应用于活性污泥法废水处理。通过计算发现，对于反应器体积、循环比和其他操作参数的特定组合，采用上述运行策略可以在时间平均转换方面提高系统的整体性能。这种操作策略最重要的标准在于，整个系统的性能提高是通过自然振荡而不是强迫振荡来实现的。在实验研究和最终应用于工业过程中，这种自由耦合和强迫振动的新概念是有利的，因为它不需要任何额外的外部能量。
The paper describes a novel operation strategy for improvement in the performance of biochemical reactors. The dynamic behavior of two coupled continuous stirred-tank reactors with recycle is studied when one of the reactors is being operated under limit cycle regimes producing self-sustained natural oscillations. The periodic output from one reactor is then used as forced input into the other reactor. The novel operation strategy is applied to wastewater treatment by the activated sludge process. It was observed and demonstrated through computation that the overall performance of the system can be enhanced in terms of time-averaged conversion by employing the above-mentioned operation strategy for a particular combination of reactor volume, recycle ratio and other operating parameters. The most significant criterion of this operation strategy lies in the fact that the performance enhancement of the overall system is achieved through natural oscillation rather than forced oscillation. In experimental studies and in eventual application to industrial processes this new concept of coupling free and forced oscillation is advantageous, as it does not require any additional external energy.