| 摘要 |
<p>A highly efficient and compact biological waste treatment system for use in conjunction with an anaerobic holding tank to provide a high degree of purification for use in areas where municipal sewer systems are unavailable. A pump conveys anaerobically treated sewage from the septic tank to a biological oxidation tank which employs a plurality of partially submerged discs providing a surface for the growth of bacterial slimes. A motor rotates the discs so that the bacteria can oxidize the sewage thereby removing substantially all of the biochemical oxygen demand. After dropping to a settling tank, from the bottom of which sludge is returned to the septic tank, the clarified supernatant is passed through a filter to a high efficiency sterilizer which utilizes a heat exchanger. An artificial feed system is provided to supply nutrients to keep bacteria in the biological oxidation tank alive during extended periods of nonuse of the system.</p> |
