| 摘要 |
<p>Biological purificn. appts., for domestic waste water and sewage, operates either by full oxidn. by means of activated sludge or as a digester/clarifier followed by an aerobic treatment. The effluent arrives through the inlet pipe which dips into the primary digestion cell, to prevent smells from reaching the building; it is oxidised by air from the compressor entering by a row of nozzles, when the appts. operates by full oxidn. When used as a digester/clarifier, the chimney surmounting a cone serves as the zone of the floating materials. The effluent thus treated passes into the primary clarifying cell through a longitudinal orifice, so as to trap the floating, and re-circulate the heavy, matter. The clarified water passes into a second oxidn. cell through an orifice high up in a partition. This cell is filled with a filtering material of the pozzolana type; this is generated by blowing nozzles. The effluent then goes to the final clarifier through an orifice at the base of another partition. The treated effluent finally leaves through a 'T' joint. Appts. is arranged in a single block for individual houses and small communities; it can operate whether it is used by fewer or more than a given number of persons.</p> |
