| 摘要 |
<p>PURPOSE:To prevent the deterioration of a microorganism membrane in a filtration vessel with biomembrane in the operation of stopping water flow. CONSTITUTION:An oxygen dissolving vessel 11 and a filtration vessel with a biomembrane 12 are equipped. Circulating mechanisms 36, 38, 39, which return the treated water from the outlet of the filtration vessel with a biomembrane 12 to the inlet supplying oxygen to the water, are installed.</p> |
