A Study on BOD Removal Performance and Aeration Tank Management in Rural Sewerage Treatment Facilities with Intermittent Aerobic Suspended-Growth Processes

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  • 連続流入間欠ばっ気活性汚泥方式の農業集落排水施設におけるばっ気槽管理とBOD除去性能に関する研究
  • レンゾク リュウニュウ カンケツバッキカッセイ オデイ ホウシキ ノ ノウギョウ シュウラク ハイスイ シセツ ニ オケル バッキソウ カンリ ト BOD ジョキョ セイノウ ニ カンスル ケンキュウ

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<p>From this research it is clear that ORP of first aeration tank in intermittent aerobic suspended-growth sewerage treatment facilities should be held in range of 100∼125 mV in order to ensure BOD removal performance, and DO behavior characteristics vary with operation condition such as types of diffused aeration devices, aeration intensity, and aeration time. KLa can be classified by types of diffused aeration devices, and it can be deduced from aeration intensity, temperature and MLSS of aeration tank mixed fluid, also, BOD reaction rate constant can be deduced from aeration intensity, aeration time and temperature of aeration tank mixed fluid. It is shown that operation efficiency of intermittent aerobic suspended-growth sewerage treatment facilities can be improved by choosing the recommend combination of aeration intensity (0.03 m3∙m-3∙mim-1) and aeration time (30 min) which is appropriate to the diffused aeration device, as the result, required BOD removal performance can be obtained with less consumption of air quantity.</p>

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