Principle and Characteristics of Reversed A~2/O Process
Principle and Characteristics of Reversed A~2/O Process
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发表时间：
2000
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通讯作者：
Z. Bo
中科院分区：
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作者：
Z. Bo
通过小型试验研究了厌氧区短时间停留和缺氧区与厌氧区顺序颠倒对磷释放和吸收的生化特性。结果表明：（1）有效磷释放的充分与否并不是决定过量吸磷能力的充分必要条件。在一定程度上，较长的水力停留时间和较充分的厌氧环境，在随后的好氧条件下产生更强的过量吸磷潜力。(2)在生物脱氮除磷工艺中，将厌氧区与缺氧区位置对调，改为倒置A2/O工艺，可获得更好的脱氮除磷效果。其除磷、脱氮率明显高于常规A2/O工艺，而COD去除率与常规A2/O工艺相当。
The biochemical characteristics of short time retention in anaerobic zone and sequence reversing of anaerobic and anoxic zones on phosphorus release and uptake were studied in bench scale experiments. The results showed that:(1) the effective phosphorus release, fully or not, is not the sufficient and necessary condition deciding the ability of excess P uptake. To a certain extent,a relatively longer HRT and a more sufficient anaerobic environment produce a stronger potential of excess P uptake in the following aerobic condition.(2) a much better effect of N P removal can be obtained in biological nutrient removal process by reversing the position of anaerobic and anoxic zones and turning into reversed A 2/O process. Its phosphorus and nitrogen removal rates are markedly higher than that of conventional A 2/O process, whereas the COD removal rates are about equal.