| 摘要 |
<p>PURPOSE:To eliminate the need for a large-sized device and to shorten the treatment time by adding the high-concn. treated sludge obtd. by an aerobic decomposition treatment in another device or the high-concn. treated sludge obtd. by an anaerobic decomposition treatment into respectively corresponding treating chambers and treating the same. CONSTITUTION:Open channel type water conduits 4 are successively provided at need and air, etc., are fed therein from an air vent pipe if sewage is subjected to the aerobic decomposition treatment. The air, etc., are not used in the case of execution of the anaerobic decomposition treatment. The treated sewage is treated by a settled sludge collecting device 6 and the high-concn. treated sludge is gathered in a sludge collecting section 7. The gathered high-concn. treated sludge which is subjected to the aerobic treatment is supplied to an aerobic decomposition treatment tank and the sludge subjected to the anaerobic treatment is supplied to an anaerobic decomposition treatment device. A large amt. of the sludge is treated by the compact device in this way.</p> |
