| 摘要 |
<p>PURPOSE:To treat waste water under constant conditions by allowing the waste water to flow at a constant flow rate in plural pipes of a small diameter with iron oxidation bacteria adsorbed on the inner walls. CONSTITUTION:Waste water (a) contg. ferrous sulfate is fed from a feed pipe 1 to the top of a filler 3 in an aeration tank 2. By dropping and aerating the waste water (a), oxygen is dissolved in the water (a) so as to activate iron oxidation bacteria. The waste water (a) is then allowed to flow naturally in three inclined pipes 4 of a small diameter. During the flowing, ferrous ions in the waste water are surely oxidized with iron oxidation bacteria adsorbed on the inner walls of the pipes 4 without causing air stagnation in the pipes 4.</p> |
