| 摘要 |
<p>PURPOSE:To obtain the small sized treating septic tank which has excellent treating performance, such as BOD removal rate, and is compact by providing a biomembrane filter tank packed with many porous carries for making a biological treatment by microorganisms and physical filtration. CONSTITUTION:The small sized treating septic tank for <=50 persons for treatments is provided with a raw water tank R, the biomembrane filter tank S and a treated water tank T which are integrated compact. The biomembrane filter tank S for making an aerobic septic treatment is provided with the biomembrane filter layer 45 packed with the many carriers (e.g. porous ceramics carriers) which make the biological treatment by the microorganisms and the physical treatment. Consequently, the high BOD removal performance and KLa value (oxygen moving efficiency) are obtd. and conversely, BOD and MLSS (sludge concn.) load are decreased. The smallsized treating septic tank which has the excellent treatment performance, such as BOD removal rate, and is compact is, therefore, obtd.</p> |
